{
  "schema": "aq26_england_network_review_v3",
  "status": "partial_england_network_review",
  "target_area": "England",
  "period_start": "2026-09-11",
  "period_end": "2026-10-10",
  "period_days": 30,
  "period_end_rule": "latest completed source-calendar day with valid evidence in all 9 English regions",
  "regions_with_valid_data_on_period_end": 9,
  "configured_region_count": 9,
  "regions_reporting": 9,
  "region_coverage_percent": 100.0,
  "active_aurn_sites_discovered": 172,
  "configured_target_pollutant_station_count": 143,
  "reporting_station_count": 141,
  "reporting_station_coverage_percent": 98.6,
  "configured_target_stream_count": 332,
  "expected_configured_stream_days": 9960,
  "valid_pollutant_day_observations": 9720,
  "unique_station_days": 4218,
  "valid_station_days": 9720,
  "configured_stream_day_completeness_percent": 97.6,
  "national_publication_ready": false,
  "coverage_contract": {
    "all_nine_english_regions_required": true,
    "minimum_reporting_station_fraction": 0.85,
    "minimum_configured_stream_day_fraction": 0.85,
    "minimum_region_pollutant_stream_day_fraction": 0.8,
    "minimum_stations_for_regional_comparison": 2,
    "fixed_panel_minimum_valid_days": 27,
    "configured_pollutant_streams_are_the_completeness_denominator": true
  },
  "completeness_scope": "valid pollutant-day observations divided by expected pollutant-day observations for every currently configured NO2, PM10 and PM2.5 stream discovered at active English AURN sites",
  "configured_stream_day_completeness_formula": {
    "numerator_key": "valid_pollutant_day_observations",
    "denominator_key": "expected_configured_stream_days",
    "unit": "pollutant-day observations",
    "formula": "100 × valid pollutant-day observations / expected configured pollutant-day observations"
  },
  "pollutant_coverage": [
    {
      "pollutant": "PM2.5",
      "configured_station_streams": 127,
      "configured_regions": 9,
      "expected_pollutant_day_observations": 3810,
      "expected_station_days": 3810,
      "reporting_stations": 125,
      "reporting_regions": 9,
      "valid_pollutant_day_observations": 3714,
      "valid_station_days": 3714,
      "configured_stream_day_completeness_percent": 97.5,
      "all_configured_regions_reporting": true,
      "coverage_status": "reporting"
    },
    {
      "pollutant": "PM10",
      "configured_station_streams": 109,
      "configured_regions": 9,
      "expected_pollutant_day_observations": 3270,
      "expected_station_days": 3270,
      "reporting_stations": 107,
      "reporting_regions": 9,
      "valid_pollutant_day_observations": 3183,
      "valid_station_days": 3183,
      "configured_stream_day_completeness_percent": 97.3,
      "all_configured_regions_reporting": true,
      "coverage_status": "reporting"
    },
    {
      "pollutant": "NO2",
      "configured_station_streams": 96,
      "configured_regions": 9,
      "expected_pollutant_day_observations": 2880,
      "expected_station_days": 2880,
      "reporting_stations": 96,
      "reporting_regions": 9,
      "valid_pollutant_day_observations": 2823,
      "valid_station_days": 2823,
      "configured_stream_day_completeness_percent": 98.0,
      "all_configured_regions_reporting": true,
      "coverage_status": "reporting"
    }
  ],
  "region_pollutant_coverage": [
    {
      "region": "North East",
      "pollutant": "PM2.5",
      "expected_pollutant_day_observations": 360,
      "expected_station_days": 360,
      "valid_pollutant_day_observations": 356,
      "valid_station_days": 356,
      "reporting_stations": 12,
      "completeness_percent": 98.9,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "North East",
      "pollutant": "PM10",
      "expected_pollutant_day_observations": 300,
      "expected_station_days": 300,
      "valid_pollutant_day_observations": 296,
      "valid_station_days": 296,
      "reporting_stations": 10,
      "completeness_percent": 98.7,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "North East",
      "pollutant": "NO2",
      "expected_pollutant_day_observations": 240,
      "expected_station_days": 240,
      "valid_pollutant_day_observations": 214,
      "valid_station_days": 214,
      "reporting_stations": 8,
      "completeness_percent": 89.2,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "North West",
      "pollutant": "PM2.5",
      "expected_pollutant_day_observations": 540,
      "expected_station_days": 540,
      "valid_pollutant_day_observations": 531,
      "valid_station_days": 531,
      "reporting_stations": 18,
      "completeness_percent": 98.3,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "North West",
      "pollutant": "PM10",
      "expected_pollutant_day_observations": 480,
      "expected_station_days": 480,
      "valid_pollutant_day_observations": 471,
      "valid_station_days": 471,
      "reporting_stations": 16,
      "completeness_percent": 98.1,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "North West",
      "pollutant": "NO2",
      "expected_pollutant_day_observations": 510,
      "expected_station_days": 510,
      "valid_pollutant_day_observations": 503,
      "valid_station_days": 503,
      "reporting_stations": 17,
      "completeness_percent": 98.6,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "expected_pollutant_day_observations": 570,
      "expected_station_days": 570,
      "valid_pollutant_day_observations": 570,
      "valid_station_days": 570,
      "reporting_stations": 19,
      "completeness_percent": 100.0,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "expected_pollutant_day_observations": 510,
      "expected_station_days": 510,
      "valid_pollutant_day_observations": 506,
      "valid_station_days": 506,
      "reporting_stations": 17,
      "completeness_percent": 99.2,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "expected_pollutant_day_observations": 450,
      "expected_station_days": 450,
      "valid_pollutant_day_observations": 450,
      "valid_station_days": 450,
      "reporting_stations": 15,
      "completeness_percent": 100.0,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "East Midlands",
      "pollutant": "PM2.5",
      "expected_pollutant_day_observations": 390,
      "expected_station_days": 390,
      "valid_pollutant_day_observations": 385,
      "valid_station_days": 385,
      "reporting_stations": 13,
      "completeness_percent": 98.7,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "East Midlands",
      "pollutant": "PM10",
      "expected_pollutant_day_observations": 330,
      "expected_station_days": 330,
      "valid_pollutant_day_observations": 330,
      "valid_station_days": 330,
      "reporting_stations": 11,
      "completeness_percent": 100.0,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "East Midlands",
      "pollutant": "NO2",
      "expected_pollutant_day_observations": 270,
      "expected_station_days": 270,
      "valid_pollutant_day_observations": 262,
      "valid_station_days": 262,
      "reporting_stations": 9,
      "completeness_percent": 97.0,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "expected_pollutant_day_observations": 570,
      "expected_station_days": 570,
      "valid_pollutant_day_observations": 567,
      "valid_station_days": 567,
      "reporting_stations": 19,
      "completeness_percent": 99.5,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "West Midlands",
      "pollutant": "PM10",
      "expected_pollutant_day_observations": 540,
      "expected_station_days": 540,
      "valid_pollutant_day_observations": 537,
      "valid_station_days": 537,
      "reporting_stations": 18,
      "completeness_percent": 99.4,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "West Midlands",
      "pollutant": "NO2",
      "expected_pollutant_day_observations": 480,
      "expected_station_days": 480,
      "valid_pollutant_day_observations": 470,
      "valid_station_days": 470,
      "reporting_stations": 16,
      "completeness_percent": 97.9,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "East of England",
      "pollutant": "PM2.5",
      "expected_pollutant_day_observations": 210,
      "expected_station_days": 210,
      "valid_pollutant_day_observations": 150,
      "valid_station_days": 150,
      "reporting_stations": 5,
      "completeness_percent": 71.4,
      "meets_minimum_cell_floor": false,
      "meets_national_stream_threshold": false,
      "coverage_status": "below_minimum_floor"
    },
    {
      "region": "East of England",
      "pollutant": "PM10",
      "expected_pollutant_day_observations": 150,
      "expected_station_days": 150,
      "valid_pollutant_day_observations": 120,
      "valid_station_days": 120,
      "reporting_stations": 4,
      "completeness_percent": 80.0,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": false,
      "coverage_status": "meets_minimum_floor_with_exception"
    },
    {
      "region": "East of England",
      "pollutant": "NO2",
      "expected_pollutant_day_observations": 120,
      "expected_station_days": 120,
      "valid_pollutant_day_observations": 120,
      "valid_station_days": 120,
      "reporting_stations": 4,
      "completeness_percent": 100.0,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "London",
      "pollutant": "PM2.5",
      "expected_pollutant_day_observations": 210,
      "expected_station_days": 210,
      "valid_pollutant_day_observations": 207,
      "valid_station_days": 207,
      "reporting_stations": 7,
      "completeness_percent": 98.6,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "London",
      "pollutant": "PM10",
      "expected_pollutant_day_observations": 180,
      "expected_station_days": 180,
      "valid_pollutant_day_observations": 147,
      "valid_station_days": 147,
      "reporting_stations": 5,
      "completeness_percent": 81.7,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": false,
      "coverage_status": "meets_minimum_floor_with_exception"
    },
    {
      "region": "London",
      "pollutant": "NO2",
      "expected_pollutant_day_observations": 120,
      "expected_station_days": 120,
      "valid_pollutant_day_observations": 120,
      "valid_station_days": 120,
      "reporting_stations": 4,
      "completeness_percent": 100.0,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "South East",
      "pollutant": "PM2.5",
      "expected_pollutant_day_observations": 540,
      "expected_station_days": 540,
      "valid_pollutant_day_observations": 540,
      "valid_station_days": 540,
      "reporting_stations": 18,
      "completeness_percent": 100.0,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "South East",
      "pollutant": "PM10",
      "expected_pollutant_day_observations": 480,
      "expected_station_days": 480,
      "valid_pollutant_day_observations": 478,
      "valid_station_days": 478,
      "reporting_stations": 16,
      "completeness_percent": 99.6,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "South East",
      "pollutant": "NO2",
      "expected_pollutant_day_observations": 390,
      "expected_station_days": 390,
      "valid_pollutant_day_observations": 386,
      "valid_station_days": 386,
      "reporting_stations": 13,
      "completeness_percent": 99.0,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "South West",
      "pollutant": "PM2.5",
      "expected_pollutant_day_observations": 420,
      "expected_station_days": 420,
      "valid_pollutant_day_observations": 408,
      "valid_station_days": 408,
      "reporting_stations": 14,
      "completeness_percent": 97.1,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "South West",
      "pollutant": "PM10",
      "expected_pollutant_day_observations": 300,
      "expected_station_days": 300,
      "valid_pollutant_day_observations": 298,
      "valid_station_days": 298,
      "reporting_stations": 10,
      "completeness_percent": 99.3,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    },
    {
      "region": "South West",
      "pollutant": "NO2",
      "expected_pollutant_day_observations": 300,
      "expected_station_days": 300,
      "valid_pollutant_day_observations": 298,
      "valid_station_days": 298,
      "reporting_stations": 10,
      "completeness_percent": 99.3,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": true,
      "coverage_status": "meets_national_threshold"
    }
  ],
  "regional_coverage_exceptions": [
    {
      "region": "East of England",
      "pollutant": "PM10",
      "expected_pollutant_day_observations": 150,
      "expected_station_days": 150,
      "valid_pollutant_day_observations": 120,
      "valid_station_days": 120,
      "reporting_stations": 4,
      "completeness_percent": 80.0,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": false,
      "coverage_status": "meets_minimum_floor_with_exception"
    },
    {
      "region": "London",
      "pollutant": "PM10",
      "expected_pollutant_day_observations": 180,
      "expected_station_days": 180,
      "valid_pollutant_day_observations": 147,
      "valid_station_days": 147,
      "reporting_stations": 5,
      "completeness_percent": 81.7,
      "meets_minimum_cell_floor": true,
      "meets_national_stream_threshold": false,
      "coverage_status": "meets_minimum_floor_with_exception"
    }
  ],
  "availability": [
    {
      "region": "North East",
      "active_aurn_sites_discovered": 13,
      "configured_target_pollutant_sites": 12,
      "reporting_stations": 12,
      "pollutants_with_valid_daily_means": [
        "NO2",
        "PM10",
        "PM2.5"
      ],
      "valid_pollutant_day_observations": 866,
      "valid_station_days": 866,
      "coverage_status": "reporting"
    },
    {
      "region": "North West",
      "active_aurn_sites_discovered": 24,
      "configured_target_pollutant_sites": 23,
      "reporting_stations": 23,
      "pollutants_with_valid_daily_means": [
        "NO2",
        "PM10",
        "PM2.5"
      ],
      "valid_pollutant_day_observations": 1505,
      "valid_station_days": 1505,
      "coverage_status": "reporting"
    },
    {
      "region": "Yorkshire and the Humber",
      "active_aurn_sites_discovered": 21,
      "configured_target_pollutant_sites": 20,
      "reporting_stations": 20,
      "pollutants_with_valid_daily_means": [
        "NO2",
        "PM10",
        "PM2.5"
      ],
      "valid_pollutant_day_observations": 1526,
      "valid_station_days": 1526,
      "coverage_status": "reporting"
    },
    {
      "region": "East Midlands",
      "active_aurn_sites_discovered": 17,
      "configured_target_pollutant_sites": 14,
      "reporting_stations": 14,
      "pollutants_with_valid_daily_means": [
        "NO2",
        "PM10",
        "PM2.5"
      ],
      "valid_pollutant_day_observations": 977,
      "valid_station_days": 977,
      "coverage_status": "reporting"
    },
    {
      "region": "West Midlands",
      "active_aurn_sites_discovered": 22,
      "configured_target_pollutant_sites": 22,
      "reporting_stations": 22,
      "pollutants_with_valid_daily_means": [
        "NO2",
        "PM10",
        "PM2.5"
      ],
      "valid_pollutant_day_observations": 1574,
      "valid_station_days": 1574,
      "coverage_status": "reporting"
    },
    {
      "region": "East of England",
      "active_aurn_sites_discovered": 15,
      "configured_target_pollutant_sites": 8,
      "reporting_stations": 6,
      "pollutants_with_valid_daily_means": [
        "NO2",
        "PM10",
        "PM2.5"
      ],
      "valid_pollutant_day_observations": 390,
      "valid_station_days": 390,
      "coverage_status": "reporting"
    },
    {
      "region": "London",
      "active_aurn_sites_discovered": 17,
      "configured_target_pollutant_sites": 7,
      "reporting_stations": 7,
      "pollutants_with_valid_daily_means": [
        "NO2",
        "PM10",
        "PM2.5"
      ],
      "valid_pollutant_day_observations": 474,
      "valid_station_days": 474,
      "coverage_status": "reporting"
    },
    {
      "region": "South East",
      "active_aurn_sites_discovered": 24,
      "configured_target_pollutant_sites": 20,
      "reporting_stations": 20,
      "pollutants_with_valid_daily_means": [
        "NO2",
        "PM10",
        "PM2.5"
      ],
      "valid_pollutant_day_observations": 1404,
      "valid_station_days": 1404,
      "coverage_status": "reporting"
    },
    {
      "region": "South West",
      "active_aurn_sites_discovered": 19,
      "configured_target_pollutant_sites": 17,
      "reporting_stations": 17,
      "pollutants_with_valid_daily_means": [
        "NO2",
        "PM10",
        "PM2.5"
      ],
      "valid_pollutant_day_observations": 1004,
      "valid_station_days": 1004,
      "coverage_status": "reporting"
    }
  ],
  "station_statistics": [
    {
      "region": "East Midlands",
      "station_code": "CHLG",
      "uka_id": "UKA00604",
      "station_name": "Chesterfield Loundsley Green",
      "environment_type": "Urban Background",
      "pollutant": "NO2",
      "valid_days": 29,
      "ratified_days": 0,
      "provisional_or_as_supplied_days": 29,
      "period_stat_eligible": true,
      "fixed_panel_eligible": true,
      "period_mean_ug_m3": 5.67,
      "period_median_ug_m3": 5.67,
      "period_p95_daily_mean_ug_m3": 8.74,
      "max_daily_mean_ug_m3": 12.1,
      "days_above_who_reference": 0
    },
    {
      "region": "East Midlands",
      "station_code": "CHLG",
      "uka_id": "UKA00604",
      "station_name": "Chesterfield Loundsley Green",
      "environment_type": "Urban Background",
      "pollutant": "PM10",
      "valid_days": 30,
      "ratified_days": 0,
      "provisional_or_as_supplied_days": 30,
      "period_stat_eligible": true,
      "fixed_panel_eligible": true,
      "period_mean_ug_m3": 7.78,
      "period_median_ug_m3": 7.46,
      "period_p95_daily_mean_ug_m3": 13.76,
      "max_daily_mean_ug_m3": 15.01,
      "days_above_who_reference": 0
    },
    {
      "region": "East Midlands",
      "station_code": "CHLG",
      "uka_id": "UKA00604",
      "station_name": "Chesterfield Loundsley Green",
      "environment_type": "Urban Background",
      "pollutant": "PM2.5",
      "valid_days": 30,
      "ratified_days": 0,
      "provisional_or_as_supplied_days": 30,
      "period_stat_eligible": true,
      "fixed_panel_eligible": true,
      "period_mean_ug_m3": 4.06,
      "period_median_ug_m3": 3.86,
      "period_p95_daily_mean_ug_m3": 7.98,
      "max_daily_mean_ug_m3": 8.28,
      "days_above_who_reference": 0
    },
    {
      "region": "East Midlands",
      "station_code": "CHS7",
      "uka_id": "UKA00529",
      "station_name": "Chesterfield Roadside",
      "environment_type": "Urban Traffic",
      "pollutant": "NO2",
      "valid_days": 30,
      "ratified_days": 0,
      "provisional_or_as_supplied_days": 30,
      "period_stat_eligible": true,
      "fixed_panel_eligible": true,
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      "median_daily_mean_ug_m3": 10.74,
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      "median_contributing_stations": 17.0,
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      "regional_comparison_eligible": true,
      "representativeness_note": "multi-station regional descriptive summary"
    },
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    }
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      "region": "East Midlands",
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      "regional_daily_mean_ug_m3": 19.05,
      "contributing_stations": 8,
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      "region": "East Midlands",
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      "regional_daily_mean_ug_m3": 4.45,
      "contributing_stations": 13,
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      "region": "East of England",
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      "regional_daily_mean_ug_m3": 5.7,
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      "region": "East of England",
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      "regional_daily_mean_ug_m3": 3.1,
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      "date": "2026-09-11",
      "region": "London",
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      "region": "London",
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      "regional_daily_mean_ug_m3": 11.72,
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      "region": "London",
      "pollutant": "PM2.5",
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      "region": "North East",
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      "region": "North East",
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      "region": "North West",
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      "date": "2026-09-11",
      "region": "North West",
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      "region": "North West",
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      "region": "South East",
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      "region": "South East",
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      "region": "South East",
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      "regional_daily_mean_ug_m3": 3.04,
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      "date": "2026-09-11",
      "region": "South West",
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      "date": "2026-09-11",
      "region": "South West",
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      "regional_daily_mean_ug_m3": 7.5,
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      "region": "South West",
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      "region": "West Midlands",
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      "date": "2026-09-11",
      "region": "West Midlands",
      "pollutant": "PM10",
      "regional_daily_median_ug_m3": 6.99,
      "regional_daily_mean_ug_m3": 7.6,
      "contributing_stations": 18,
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      "date": "2026-09-11",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "regional_daily_median_ug_m3": 3.64,
      "regional_daily_mean_ug_m3": 3.87,
      "contributing_stations": 19,
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      "region": "Yorkshire and the Humber",
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      "date": "2026-09-11",
      "region": "Yorkshire and the Humber",
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      "regional_daily_median_ug_m3": 10.24,
      "regional_daily_mean_ug_m3": 10.29,
      "contributing_stations": 16,
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      "date": "2026-09-11",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "regional_daily_median_ug_m3": 5.35,
      "regional_daily_mean_ug_m3": 5.63,
      "contributing_stations": 19,
      "regional_comparison_eligible": true
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      "date": "2026-09-12",
      "region": "East Midlands",
      "pollutant": "NO2",
      "regional_daily_median_ug_m3": 12.49,
      "regional_daily_mean_ug_m3": 13.26,
      "contributing_stations": 9,
      "regional_comparison_eligible": true
    },
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      "date": "2026-09-12",
      "region": "East Midlands",
      "pollutant": "PM10",
      "regional_daily_median_ug_m3": 8.17,
      "regional_daily_mean_ug_m3": 8.55,
      "contributing_stations": 11,
      "regional_comparison_eligible": true
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      "date": "2026-09-12",
      "region": "East Midlands",
      "pollutant": "PM2.5",
      "regional_daily_median_ug_m3": 4.71,
      "regional_daily_mean_ug_m3": 4.81,
      "contributing_stations": 13,
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      "date": "2026-09-12",
      "region": "East of England",
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      "regional_daily_median_ug_m3": 9.11,
      "regional_daily_mean_ug_m3": 10.17,
      "contributing_stations": 4,
      "regional_comparison_eligible": true
    },
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      "date": "2026-09-12",
      "region": "East of England",
      "pollutant": "PM10",
      "regional_daily_median_ug_m3": 7.34,
      "regional_daily_mean_ug_m3": 7.35,
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      "regional_comparison_eligible": true
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      "date": "2026-09-12",
      "region": "East of England",
      "pollutant": "PM2.5",
      "regional_daily_median_ug_m3": 3.91,
      "regional_daily_mean_ug_m3": 3.9,
      "contributing_stations": 5,
      "regional_comparison_eligible": true
    },
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      "date": "2026-09-12",
      "region": "London",
      "pollutant": "NO2",
      "regional_daily_median_ug_m3": 16.7,
      "regional_daily_mean_ug_m3": 16.33,
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      "regional_comparison_eligible": true
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      "date": "2026-09-12",
      "region": "London",
      "pollutant": "PM10",
      "regional_daily_median_ug_m3": 7.38,
      "regional_daily_mean_ug_m3": 7.64,
      "contributing_stations": 5,
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      "date": "2026-09-12",
      "region": "London",
      "pollutant": "PM2.5",
      "regional_daily_median_ug_m3": 3.93,
      "regional_daily_mean_ug_m3": 3.86,
      "contributing_stations": 7,
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      "date": "2026-09-12",
      "region": "North East",
      "pollutant": "NO2",
      "regional_daily_median_ug_m3": 6.53,
      "regional_daily_mean_ug_m3": 7.32,
      "contributing_stations": 6,
      "regional_comparison_eligible": true
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      "date": "2026-09-12",
      "region": "North East",
      "pollutant": "PM10",
      "regional_daily_median_ug_m3": 9.18,
      "regional_daily_mean_ug_m3": 9.52,
      "contributing_stations": 10,
      "regional_comparison_eligible": true
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      "date": "2026-09-12",
      "region": "North East",
      "pollutant": "PM2.5",
      "regional_daily_median_ug_m3": 5.91,
      "regional_daily_mean_ug_m3": 6.29,
      "contributing_stations": 12,
      "regional_comparison_eligible": true
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      "date": "2026-09-12",
      "region": "North West",
      "pollutant": "NO2",
      "regional_daily_median_ug_m3": 10.09,
      "regional_daily_mean_ug_m3": 9.6,
      "contributing_stations": 17,
      "regional_comparison_eligible": true
    },
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      "date": "2026-09-12",
      "region": "North West",
      "pollutant": "PM10",
      "regional_daily_median_ug_m3": 11.17,
      "regional_daily_mean_ug_m3": 10.94,
      "contributing_stations": 15,
      "regional_comparison_eligible": true
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      "date": "2026-09-12",
      "region": "North West",
      "pollutant": "PM2.5",
      "regional_daily_median_ug_m3": 6.89,
      "regional_daily_mean_ug_m3": 6.62,
      "contributing_stations": 17,
      "regional_comparison_eligible": true
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      "date": "2026-09-12",
      "region": "South East",
      "pollutant": "NO2",
      "regional_daily_median_ug_m3": 8.91,
      "regional_daily_mean_ug_m3": 10.62,
      "contributing_stations": 13,
      "regional_comparison_eligible": true
    },
    {
      "date": "2026-09-12",
      "region": "South East",
      "pollutant": "PM10",
      "regional_daily_median_ug_m3": 8.43,
      "regional_daily_mean_ug_m3": 8.23,
      "contributing_stations": 16,
      "regional_comparison_eligible": true
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      "date": "2026-09-12",
      "region": "South East",
      "pollutant": "PM2.5",
      "regional_daily_median_ug_m3": 3.82,
      "regional_daily_mean_ug_m3": 3.99,
      "contributing_stations": 18,
      "regional_comparison_eligible": true
    },
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      "date": "2026-09-12",
      "region": "South West",
      "pollutant": "NO2",
      "regional_daily_median_ug_m3": 9.35,
      "regional_daily_mean_ug_m3": 9.14,
      "contributing_stations": 10,
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    {
      "date": "2026-09-12",
      "region": "South West",
      "pollutant": "PM10",
      "regional_daily_median_ug_m3": 7.52,
      "regional_daily_mean_ug_m3": 8.25,
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      "date": "2026-09-12",
      "region": "South West",
      "pollutant": "PM2.5",
      "regional_daily_median_ug_m3": 3.75,
      "regional_daily_mean_ug_m3": 3.95,
      "contributing_stations": 14,
      "regional_comparison_eligible": true
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      "date": "2026-09-12",
      "region": "West Midlands",
      "pollutant": "NO2",
      "regional_daily_median_ug_m3": 8.16,
      "regional_daily_mean_ug_m3": 9.66,
      "contributing_stations": 16,
      "regional_comparison_eligible": true
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    {
      "date": "2026-09-12",
      "region": "West Midlands",
      "pollutant": "PM10",
      "regional_daily_median_ug_m3": 7.51,
      "regional_daily_mean_ug_m3": 7.48,
      "contributing_stations": 18,
      "regional_comparison_eligible": true
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      "date": "2026-09-12",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "regional_daily_median_ug_m3": 4.0,
      "regional_daily_mean_ug_m3": 4.07,
      "contributing_stations": 19,
      "regional_comparison_eligible": true
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      "date": "2026-09-12",
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "regional_daily_median_ug_m3": 13.12,
      "regional_daily_mean_ug_m3": 12.46,
      "contributing_stations": 15,
      "regional_comparison_eligible": true
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    {
      "date": "2026-09-12",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "regional_daily_median_ug_m3": 11.04,
      "regional_daily_mean_ug_m3": 11.04,
      "contributing_stations": 16,
      "regional_comparison_eligible": true
    },
    {
      "date": "2026-09-12",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "regional_daily_median_ug_m3": 6.52,
      "regional_daily_mean_ug_m3": 6.75,
      "contributing_stations": 19,
      "regional_comparison_eligible": true
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      "date": "2026-09-13",
      "region": "East Midlands",
      "pollutant": "NO2",
      "regional_daily_median_ug_m3": 9.77,
      "regional_daily_mean_ug_m3": 12.66,
      "contributing_stations": 9,
      "regional_comparison_eligible": true
    },
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      "date": "2026-09-13",
      "region": "East Midlands",
      "pollutant": "PM10",
      "regional_daily_median_ug_m3": 6.66,
      "regional_daily_mean_ug_m3": 6.17,
      "contributing_stations": 11,
      "regional_comparison_eligible": true
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      "date": "2026-09-13",
      "region": "East Midlands",
      "pollutant": "PM2.5",
      "regional_daily_median_ug_m3": 4.03,
      "regional_daily_mean_ug_m3": 3.6,
      "contributing_stations": 12,
      "regional_comparison_eligible": true
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      "date": "2026-09-13",
      "region": "East of England",
      "pollutant": "NO2",
      "regional_daily_median_ug_m3": 9.28,
      "regional_daily_mean_ug_m3": 8.82,
      "contributing_stations": 4,
      "regional_comparison_eligible": true
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      "date": "2026-09-13",
      "region": "East of England",
      "pollutant": "PM10",
      "regional_daily_median_ug_m3": 5.18,
      "regional_daily_mean_ug_m3": 4.9,
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      "regional_comparison_eligible": true
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      "date": "2026-09-13",
      "region": "East of England",
      "pollutant": "PM2.5",
      "regional_daily_median_ug_m3": 2.68,
      "regional_daily_mean_ug_m3": 2.66,
      "contributing_stations": 5,
      "regional_comparison_eligible": true
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      "date": "2026-09-13",
      "region": "London",
      "pollutant": "NO2",
      "regional_daily_median_ug_m3": 13.63,
      "regional_daily_mean_ug_m3": 12.42,
      "contributing_stations": 4,
      "regional_comparison_eligible": true
    },
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      "date": "2026-09-13",
      "region": "London",
      "pollutant": "PM10",
      "regional_daily_median_ug_m3": 4.55,
      "regional_daily_mean_ug_m3": 4.53,
      "contributing_stations": 5,
      "regional_comparison_eligible": true
    },
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      "date": "2026-09-13",
      "region": "London",
      "pollutant": "PM2.5",
      "regional_daily_median_ug_m3": 2.91,
      "regional_daily_mean_ug_m3": 2.76,
      "contributing_stations": 7,
      "regional_comparison_eligible": true
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      "date": "2026-09-13",
      "region": "North East",
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      "regional_daily_median_ug_m3": 12.89,
      "regional_daily_mean_ug_m3": 12.17,
      "contributing_stations": 6,
      "regional_comparison_eligible": true
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      "date": "2026-09-13",
      "region": "North East",
      "pollutant": "PM10",
      "regional_daily_median_ug_m3": 11.84,
      "regional_daily_mean_ug_m3": 11.87,
      "contributing_stations": 10,
      "regional_comparison_eligible": true
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      "date": "2026-09-13",
      "region": "North East",
      "pollutant": "PM2.5",
      "regional_daily_median_ug_m3": 8.0,
      "regional_daily_mean_ug_m3": 8.07,
      "contributing_stations": 12,
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      "region": "North West",
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      "regional_daily_median_ug_m3": 11.87,
      "regional_daily_mean_ug_m3": 11.29,
      "contributing_stations": 17,
      "regional_comparison_eligible": true
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      "date": "2026-09-13",
      "region": "North West",
      "pollutant": "PM10",
      "regional_daily_median_ug_m3": 7.7,
      "regional_daily_mean_ug_m3": 8.11,
      "contributing_stations": 15,
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      "region": "North West",
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      "regional_daily_mean_ug_m3": 5.06,
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      "region": "South East",
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      "region": "South East",
      "pollutant": "PM10",
      "regional_daily_median_ug_m3": 7.72,
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      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "PRES",
      "uka_id": "UKA00408",
      "region": "North West",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "PRES",
      "uka_id": "UKA00408",
      "region": "North West",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "ROCB",
      "uka_id": "UKA01174",
      "region": "North West",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "ROCB",
      "uka_id": "UKA01174",
      "region": "North West",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "ECCL",
      "uka_id": "UKA00339",
      "region": "North West",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "ECCL",
      "uka_id": "UKA00339",
      "region": "North West",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "ECCL",
      "uka_id": "UKA00339",
      "region": "North West",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "CW",
      "uka_id": "UKA00579",
      "region": "North West",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SHLW",
      "uka_id": "UKA00627",
      "region": "North West",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SHLW",
      "uka_id": "UKA00627",
      "region": "North West",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "TAMM",
      "uka_id": "UKA01099",
      "region": "North West",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WARP",
      "uka_id": "UKA01175",
      "region": "North West",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WARP",
      "uka_id": "UKA01175",
      "region": "North West",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WARP",
      "uka_id": "UKA01175",
      "region": "North West",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WSMR",
      "uka_id": "UKA00603",
      "region": "North West",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WIG5",
      "uka_id": "UKA00482",
      "region": "North West",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WIG5",
      "uka_id": "UKA00482",
      "region": "North West",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WIG5",
      "uka_id": "UKA00482",
      "region": "North West",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "TRAN",
      "uka_id": "UKA00406",
      "region": "North West",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "TRAN",
      "uka_id": "UKA00406",
      "region": "North West",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "TRAN",
      "uka_id": "UKA00406",
      "region": "North West",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BAR3",
      "uka_id": "UKA00353",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BAR3",
      "uka_id": "UKA00353",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BAR3",
      "uka_id": "UKA00353",
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BDMA",
      "uka_id": "UKA00611",
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BRAS",
      "uka_id": "UKA01090",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BRAS",
      "uka_id": "UKA01090",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BRWP",
      "uka_id": "UKA01161",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BRWP",
      "uka_id": "UKA01161",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "DYAG",
      "uka_id": "UKA00654",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "DYAG",
      "uka_id": "UKA00654",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "DYAG",
      "uka_id": "UKA00654",
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "DCST",
      "uka_id": "UKA00612",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "DCST",
      "uka_id": "UKA00612",
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "HARW",
      "uka_id": "UKA01093",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "HARW",
      "uka_id": "UKA01093",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "HUL2",
      "uka_id": "UKA00450",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "HUL2",
      "uka_id": "UKA00450",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "HUL2",
      "uka_id": "UKA00450",
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "HULR",
      "uka_id": "UKA00600",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "HULR",
      "uka_id": "UKA00600",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "HULR",
      "uka_id": "UKA00600",
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "IMGM",
      "uka_id": "UKA00647",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "IMGM",
      "uka_id": "UKA00647",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "IMGM",
      "uka_id": "UKA00647",
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LEED",
      "uka_id": "UKA00222",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LEED",
      "uka_id": "UKA00222",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LEED",
      "uka_id": "UKA00222",
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LED6",
      "uka_id": "UKA00527",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LED6",
      "uka_id": "UKA00527",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LED6",
      "uka_id": "UKA00527",
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "ROED",
      "uka_id": "UKA01054",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "ROED",
      "uka_id": "UKA01054",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SCN2",
      "uka_id": "UKA00381",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SCN2",
      "uka_id": "UKA00381",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SCN2",
      "uka_id": "UKA00381",
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SHBR",
      "uka_id": "UKA00622",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SHBR",
      "uka_id": "UKA00622",
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SHDG",
      "uka_id": "UKA00575",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SHDG",
      "uka_id": "UKA00575",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SHDG",
      "uka_id": "UKA00575",
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SHE",
      "uka_id": "UKA00181",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SHE",
      "uka_id": "UKA00181",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SHE",
      "uka_id": "UKA00181",
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WAKA",
      "uka_id": "UKA01107",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WAKA",
      "uka_id": "UKA01107",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "YK10",
      "uka_id": "UKA00523",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "YK10",
      "uka_id": "UKA00523",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "YK10",
      "uka_id": "UKA00523",
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "YK11",
      "uka_id": "UKA00524",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "YK11",
      "uka_id": "UKA00524",
      "region": "Yorkshire and the Humber",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "YK11",
      "uka_id": "UKA00524",
      "region": "Yorkshire and the Humber",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "CHLG",
      "uka_id": "UKA00604",
      "region": "East Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "CHLG",
      "uka_id": "UKA00604",
      "region": "East Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "CHLG",
      "uka_id": "UKA00604",
      "region": "East Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "CHS7",
      "uka_id": "UKA00529",
      "region": "East Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "CHS7",
      "uka_id": "UKA00529",
      "region": "East Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "CHS7",
      "uka_id": "UKA00529",
      "region": "East Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "DESA",
      "uka_id": "UKA00630",
      "region": "East Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "DESA",
      "uka_id": "UKA00630",
      "region": "East Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "DESB",
      "uka_id": "UKA01027",
      "region": "East Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "DESB",
      "uka_id": "UKA01027",
      "region": "East Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LEIR",
      "uka_id": "UKA00609",
      "region": "East Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LEIR",
      "uka_id": "UKA00609",
      "region": "East Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LEIR",
      "uka_id": "UKA00609",
      "region": "East Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LECU",
      "uka_id": "UKA00573",
      "region": "East Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LECU",
      "uka_id": "UKA00573",
      "region": "East Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LECU",
      "uka_id": "UKA00573",
      "region": "East Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LIN3",
      "uka_id": "UKA00561",
      "region": "East Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LOTA",
      "uka_id": "UKA01103",
      "region": "East Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LOTA",
      "uka_id": "UKA01103",
      "region": "East Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "MALA",
      "uka_id": "UKA01050",
      "region": "East Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "MALA",
      "uka_id": "UKA01050",
      "region": "East Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "NTN4",
      "uka_id": "UKA00632",
      "region": "East Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "NTN4",
      "uka_id": "UKA00632",
      "region": "East Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "NOTB",
      "uka_id": "UKA01092",
      "region": "East Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "NOTB",
      "uka_id": "UKA01092",
      "region": "East Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "NOTK",
      "uka_id": "UKA01048",
      "region": "East Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "NOTK",
      "uka_id": "UKA01048",
      "region": "East Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "NOTK",
      "uka_id": "UKA01048",
      "region": "East Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "NWBV",
      "uka_id": "UKA00618",
      "region": "East Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "NWBV",
      "uka_id": "UKA00618",
      "region": "East Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "NWBV",
      "uka_id": "UKA00618",
      "region": "East Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WIGS",
      "uka_id": "UKA01176",
      "region": "East Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WIGS",
      "uka_id": "UKA01176",
      "region": "East Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BEDC",
      "uka_id": "UKA01158",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BEDC",
      "uka_id": "UKA01158",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BIRR",
      "uka_id": "UKA00626",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BIRR",
      "uka_id": "UKA00626",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BIRR",
      "uka_id": "UKA00626",
      "region": "West Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BIHG",
      "uka_id": "UKA01062",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BIHG",
      "uka_id": "UKA01062",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BIHG",
      "uka_id": "UKA01062",
      "region": "West Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BMLD",
      "uka_id": "UKA00655",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BMLD",
      "uka_id": "UKA00655",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BMLD",
      "uka_id": "UKA00655",
      "region": "West Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BAQF",
      "uka_id": "UKA01108",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BAQF",
      "uka_id": "UKA01108",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BOTR",
      "uka_id": "UKA00652",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BOTR",
      "uka_id": "UKA00652",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BOTR",
      "uka_id": "UKA00652",
      "region": "West Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "CANK",
      "uka_id": "UKA00623",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "CANK",
      "uka_id": "UKA00623",
      "region": "West Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "COAL",
      "uka_id": "UKA00592",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "COAL",
      "uka_id": "UKA00592",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "COAL",
      "uka_id": "UKA00592",
      "region": "West Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "COBR",
      "uka_id": "UKA00634",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "COBR",
      "uka_id": "UKA00634",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "COBR",
      "uka_id": "UKA00634",
      "region": "West Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LEAM",
      "uka_id": "UKA00265",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LEAM",
      "uka_id": "UKA00265",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LEAM",
      "uka_id": "UKA00265",
      "region": "West Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LEAR",
      "uka_id": "UKA00564",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LEAR",
      "uka_id": "UKA00564",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LEAR",
      "uka_id": "UKA00564",
      "region": "West Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LEOM",
      "uka_id": "UKA00489",
      "region": "West Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BOLD",
      "uka_id": "UKA00595",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BOLD",
      "uka_id": "UKA00595",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BOLD",
      "uka_id": "UKA00595",
      "region": "West Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SHUN",
      "uka_id": "UKA01055",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SHUN",
      "uka_id": "UKA01055",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "STKR",
      "uka_id": "UKA00610",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "STKR",
      "uka_id": "UKA00610",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "STKR",
      "uka_id": "UKA00610",
      "region": "West Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "STOK",
      "uka_id": "UKA00337",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "STOK",
      "uka_id": "UKA00337",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "STOK",
      "uka_id": "UKA00337",
      "region": "West Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "TDHD",
      "uka_id": "UKA00648",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "TDHD",
      "uka_id": "UKA00648",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "TDHD",
      "uka_id": "UKA00648",
      "region": "West Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WALD",
      "uka_id": "UKA01117",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WALD",
      "uka_id": "UKA01117",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WAL4",
      "uka_id": "UKA00565",
      "region": "West Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WBKP",
      "uka_id": "UKA00658",
      "region": "West Midlands",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WOLE",
      "uka_id": "UKA01162",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WOLE",
      "uka_id": "UKA01162",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WORT",
      "uka_id": "UKA01098",
      "region": "West Midlands",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WORT",
      "uka_id": "UKA01098",
      "region": "West Midlands",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "CAMK",
      "uka_id": "UKA01115",
      "region": "East of England",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "CAMK",
      "uka_id": "UKA01115",
      "region": "East of England",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "CAM",
      "uka_id": "UKA00396",
      "region": "East of England",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LUTR",
      "uka_id": "UKA00605",
      "region": "East of England",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LUTR",
      "uka_id": "UKA00605",
      "region": "East of England",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "NO12",
      "uka_id": "UKA00549",
      "region": "East of England",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "NO12",
      "uka_id": "UKA00549",
      "region": "East of England",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "NO12",
      "uka_id": "UKA00549",
      "region": "East of England",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "PEGE",
      "uka_id": "UKA01052",
      "region": "East of England",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "PEGE",
      "uka_id": "UKA01052",
      "region": "East of England",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SOUS",
      "uka_id": "UKA01096",
      "region": "East of England",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SOUS",
      "uka_id": "UKA01096",
      "region": "East of England",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SEND",
      "uka_id": "UKA00409",
      "region": "East of England",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SEND",
      "uka_id": "UKA00409",
      "region": "East of England",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "SEND",
      "uka_id": "UKA00409",
      "region": "East of England",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "STGW",
      "uka_id": "UKA01156",
      "region": "East of England",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LONC",
      "uka_id": "UKA01119",
      "region": "London",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LONC",
      "uka_id": "UKA01119",
      "region": "London",
      "pollutant": "PM10",
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      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "CLL2",
      "uka_id": "UKA00211",
      "region": "London",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "CLL2",
      "uka_id": "UKA00211",
      "region": "London",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "CLL2",
      "uka_id": "UKA00211",
      "region": "London",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "HRL",
      "uka_id": "UKA00472",
      "region": "London",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "HRL",
      "uka_id": "UKA00472",
      "region": "London",
      "pollutant": "PM10",
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      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "HRL",
      "uka_id": "UKA00472",
      "region": "London",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "HIL",
      "uka_id": "UKA00266",
      "region": "London",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "HIL",
      "uka_id": "UKA00266",
      "region": "London",
      "pollutant": "PM10",
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      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "HIL",
      "uka_id": "UKA00266",
      "region": "London",
      "pollutant": "NO2",
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      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LONM",
      "uka_id": "UKA01100",
      "region": "London",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "LONM",
      "uka_id": "UKA01100",
      "region": "London",
      "pollutant": "PM10",
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      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "TED2",
      "uka_id": "UKA00572",
      "region": "London",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "TED2",
      "uka_id": "UKA00572",
      "region": "London",
      "pollutant": "PM10",
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      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "HORS",
      "uka_id": "UKA00435",
      "region": "London",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "HORS",
      "uka_id": "UKA00435",
      "region": "London",
      "pollutant": "NO2",
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      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "AYLA",
      "uka_id": "UKA01109",
      "region": "South East",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BRT3",
      "uka_id": "UKA00483",
      "region": "South East",
      "pollutant": "PM2.5",
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      "period_end": "2026-10-10",
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    },
    {
      "station_code": "BRT3",
      "uka_id": "UKA00483",
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      "period_end": "2026-10-10",
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    },
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      "station_code": "BRT3",
      "uka_id": "UKA00483",
      "region": "South East",
      "pollutant": "NO2",
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      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
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      "station_code": "CHAT",
      "uka_id": "UKA00553",
      "region": "South East",
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      "period_end": "2026-10-10",
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    },
    {
      "station_code": "CHAT",
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      "period_end": "2026-10-10",
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    },
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      "station_code": "CHAT",
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      "period_end": "2026-10-10",
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    },
    {
      "station_code": "EB",
      "uka_id": "UKA00546",
      "region": "South East",
      "pollutant": "PM2.5",
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      "period_end": "2026-10-10",
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    },
    {
      "station_code": "EB",
      "uka_id": "UKA00546",
      "region": "South East",
      "pollutant": "PM10",
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      "period_end": "2026-10-10",
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    },
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      "station_code": "EB",
      "uka_id": "UKA00546",
      "region": "South East",
      "pollutant": "NO2",
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      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "FARC",
      "uka_id": "UKA01097",
      "region": "South East",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
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      "station_code": "FARC",
      "uka_id": "UKA01097",
      "region": "South East",
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      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "MAID",
      "uka_id": "UKA01064",
      "region": "South East",
      "pollutant": "PM2.5",
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      "period_end": "2026-10-10",
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      "station_code": "MAID",
      "uka_id": "UKA01064",
      "region": "South East",
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      "period_end": "2026-10-10",
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    },
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      "station_code": "MKCC",
      "uka_id": "UKA00963",
      "region": "South East",
      "pollutant": "PM2.5",
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      "period_end": "2026-10-10",
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      "station_code": "MKCC",
      "uka_id": "UKA00963",
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      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
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      "station_code": "OX",
      "uka_id": "UKA00258",
      "region": "South East",
      "pollutant": "NO2",
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      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
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      "station_code": "OX8",
      "uka_id": "UKA00518",
      "region": "South East",
      "pollutant": "PM2.5",
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      "period_end": "2026-10-10",
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      "station_code": "OX8",
      "uka_id": "UKA00518",
      "region": "South East",
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      "period_end": "2026-10-10",
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      "station_code": "OX8",
      "uka_id": "UKA00518",
      "region": "South East",
      "pollutant": "NO2",
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      "period_end": "2026-10-10",
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    },
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      "station_code": "PMTH",
      "uka_id": "UKA00421",
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      "period_end": "2026-10-10",
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      "station_code": "PMTH",
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    },
    {
      "station_code": "POAR",
      "uka_id": "UKA00651",
      "region": "South East",
      "pollutant": "PM2.5",
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      "station_code": "POAR",
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      "station_code": "POAR",
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      "station_code": "REA5",
      "uka_id": "UKA00620",
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      "pollutant": "PM10",
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      "period_end": "2026-10-10",
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      "station_code": "REA5",
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      "pollutant": "NO2",
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      "period_end": "2026-10-10",
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      "station_code": "REA1",
      "uka_id": "UKA00462",
      "region": "South East",
      "pollutant": "PM2.5",
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      "station_code": "REA1",
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      "station_code": "RRKL",
      "uka_id": "UKA01053",
      "region": "South East",
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      "period_end": "2026-10-10",
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      "station_code": "SLOW",
      "uka_id": "UKA01091",
      "region": "South East",
      "pollutant": "PM2.5",
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      "period_end": "2026-10-10",
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      "station_code": "SLOW",
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      "region": "South East",
      "pollutant": "PM10",
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      "period_end": "2026-10-10",
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    },
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      "station_code": "SA33",
      "uka_id": "UKA00613",
      "region": "South East",
      "pollutant": "PM2.5",
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      "period_end": "2026-10-10",
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      "station_code": "SA33",
      "uka_id": "UKA00613",
      "region": "South East",
      "pollutant": "PM10",
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      "period_end": "2026-10-10",
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      "station_code": "SA33",
      "uka_id": "UKA00613",
      "region": "South East",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
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    {
      "station_code": "SOUT",
      "uka_id": "UKA00235",
      "region": "South East",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
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      "station_code": "SOUT",
      "uka_id": "UKA00235",
      "region": "South East",
      "pollutant": "PM10",
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      "station_code": "SOUT",
      "uka_id": "UKA00235",
      "region": "South East",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "STOR",
      "uka_id": "UKA00548",
      "region": "South East",
      "pollutant": "PM2.5",
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      "period_end": "2026-10-10",
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      "station_code": "STOR",
      "uka_id": "UKA00548",
      "region": "South East",
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      "station_code": "STOR",
      "uka_id": "UKA00548",
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      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
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    },
    {
      "station_code": "WTHG",
      "uka_id": "UKA00628",
      "region": "South East",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
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      "station_code": "WTHG",
      "uka_id": "UKA00628",
      "region": "South East",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "WOEA",
      "uka_id": "UKA01061",
      "region": "South East",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
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      "station_code": "WOEA",
      "uka_id": "UKA01061",
      "region": "South East",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BPLE",
      "uka_id": "UKA00574",
      "region": "South West",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BPLE",
      "uka_id": "UKA00574",
      "region": "South West",
      "pollutant": "PM10",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BHA4",
      "uka_id": "UKA00660",
      "region": "South West",
      "pollutant": "NO2",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
      "expected_station_days": 30
    },
    {
      "station_code": "BORN",
      "uka_id": "UKA00429",
      "region": "South West",
      "pollutant": "PM2.5",
      "active_start": "2026-09-11",
      "period_end": "2026-10-10",
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      "station_code": "BOBV",
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