Weekly Air-Quality Evidence Briefing

SCC Air Quality Weekly England Air-Quality Evidence Briefing

Generated: 2026-09-14T18:21:04+00:00

SCC Air Quality has updated its England-wide AURN network review, current live episode screen, source-state register, cross-reference readiness and publication checks for this weekly run.

This is an evidence-screening and convergence note, not a regulatory, legal, medical, laboratory, meteorological, causal, source-apportionment or facility-risk determination.

Part A — England 30-day AURN monitoring review

National monitoring coverage met the predefined review thresholds. This is descriptive official monitoring evidence, not a population-weighted exposure, source-attribution, compliance or health assessment.

Active AURN sites172

Reporting stations142 / 143

English regions9 / 9

Configured-stream completeness96.2%

Review period: 2026-08-15 to 2026-09-13. Valid / expected pollutant-day observations: 9,506 / 9,878.

Pollutant	Reporting / configured stations	Valid / expected pollutant-day observations	Completeness
PM2.5	126 / 127	3,667 / 3,799	96.5%
PM10	106 / 108	3,109 / 3,229	96.3%
NO2	95 / 95	2,730 / 2,850	95.8%

Time-basis assurance: PASS; GMT hour ending; daily aggregation uses the printed source calendar date. 24:00 pollutant observations retained: 79,143.

Data status: 0 ratified pollutant-day observations and 9,506 provisional or as-supplied pollutant-day observations. Provisional values may change after ratification.

Regional completeness exceptions

• London PM10: 83.3% — above the hard regional floor but below the preferred national stream threshold.

Open the complete England network review Download pollutant-day observations

Run ID: 34879885394 · Commit: 333212e0bf07c88f4a7d3df0bac236f75e6e9519

Part B — Current live PM2.5 operational screen and forensic interpretation

Evidence statement

### England-wide current assessment unavailable

The station-level PM2.5 operational screen was evaluable at 129 fresh monitoring sites and no observation pattern met its controlled preliminary rule. The governed England-wide coverage/freshness criterion was nevertheless not met, so this bounded zero-candidate result is not an England-wide current environmental assessment and does not establish safety or absence of pollution.

Assessment status: Assessment unavailable incomplete england coverage

Screening status: Evaluable — no preliminary signal

Evidence strength: Data coverage status with bounded pm25 screen

What the evidence directly shows

• Observed fact: The canonical release contains 16,023 quality-accepted observations. It identified 133 physical monitoring sites and 237 pollutant streams; 132 sites and 234 streams supplied numeric observations. Evidence: `primary_ground/primary_ground_snapshot.json`, `primary_ground/monitoring_site_availability.json`, `primary_ground/provenance_manifest.json`.
• Data quality finding: 129 of 132 reporting physical monitoring sites met the current freshness requirement. Evidence: `primary_ground/primary_ground_snapshot.json`.
• Observed fact: The run executed 0 technical cross-source join(s) and validated 0 as reproducible record linkage. Evidence: `api/cross_reference_audit.json`, `convergence/cross_reference_execution.json`.

Technical interpretation

The PM2.5 screening result is limited to eligible station assessments, the configured time window and quality rules. It does not override incomplete England-wide coverage and cannot exclude unmonitored locations, pollutants, short-lived events or effects below the screening threshold.

Corroboration status

• Applicable episode joins: 0
• Executed joins: 0
• Validated technical record-linkage joins: 0
• Configured joins still pending or blocked: 11
• Evidence dimensions without a quality-validated source: 6
• Evidence dimensions without executed episode linkage: 4
• Status: Not executed or not applicable
• Scientific meaning: Validated linkage demonstrates reproducible identifier, time or geometry matching only; it does not establish source contribution.

Alternative explanations that must be tested

• Regional or long range background pollution — Must be tested not assumed. Required evidence: validated regional comparators; CAMS or equivalent regional context.
• Road traffic, domestic/commercial combustion or other local activity — Must be tested not assumed. Required evidence: time-aligned activity data; spatial and wind-sector analysis.
• Wildfire, open burning, dust or transported aerosol — Must be tested not assumed. Required evidence: FIRMS/satellite context; meteorology and trajectory evidence.
• Monitor artefact, siting effect, missingness or method incompatibility — Must be tested not assumed. Required evidence: instrument and method metadata; quality flags; independent comparator behaviour.

Uncertainty and limitations

• Evidence geography for this run: England.
• Monitoring coverage is not equivalent to population exposure coverage.
• Technical record linkage does not establish contribution, causation or responsibility.
• Model, satellite, inventory, media and regulatory records remain separate evidence classes.
• The governed England-wide current-assessment coverage/freshness criterion was not met; the station-level PM2.5 screen is reported only as a bounded operational screening result.
• Missing or incomplete episode dimensions: competing_source_assessment, fire_and_satellite_context, official_meteorology, regional_model_context, regulatory_and_operational_context, traffic_activity.

Evidence required to change the interpretation

• Acquire and time-align official Met Office observations for every discovered event.
• Validate comparator monitor roles and create explicit urban-background, roadside and rural-background classes.
• Acquire actual DfT/WebTRIS traffic observations rather than catalogue metadata.
• Resolve principal installation permits and operator identities using exact official identifiers.
• Integrate CAMS regional fields and other competing-source layers before any source-consistent hypothesis.
• Keep the legacy Drive archive disabled; reacquire any potentially useful historic record from its original publisher before independent validation.

Explicit non-conclusions

• No source contribution or causation is determined.
• No permit, legal or regulatory breach is determined.
• No individual exposure or health effect is determined.
• No clean-air, safe-air or dangerous-air declaration is made.
• No named facility is implicated by proximity or contextual inclusion alone.

Claim boundary: Screening evidence only — no causal source attribution, legal or regulatory determination, health finding, safety declaration or compliance conclusion.

Primary measurement harvest

Pollutant time series: 237

Identified physical monitoring sites: 133

Reporting pollutant time series: 234

Physical monitoring sites with numeric data: 132

Configured streams with no accepted numeric data: 0

Provider-grid data capture: 100.0%

Fresh pollutant time series: 229

Fresh physical monitoring sites: 129

Environmental assessment status: assessment unavailable incomplete england coverage

A zero PM2.5 candidate count is a bounded operational-screen result. It does not override an unavailable England-wide assessment and is not interpreted as clean, safe or pollution-free air.

Physical sites and pollutant time series are counted separately. Missing or unresolved site identities are not silently promoted to sites.

Data-led screening and cross-reference execution

Screening events: 0

Executed cross-source joins: 0

Validated record-linkage joins: 0

Episode evidence bundles: 0

A validated join validates reproducible record linkage, time or geometry under its stated rules. It does not validate source contribution or causation.

Legacy Google Drive archive

Legacy records inventoried: 0

Legacy records quarantined: 0

Legacy records promoted through strict validation: 0

Google Drive material cannot influence SCC Air Quality findings unless the original non-Drive source, publication date, independent authority, SHA-256 content identity, lineage, parser/schema quality and exact target linkage are validated.

Validated legacy target counts

• No categories available.

These counts include only promoted legacy source records. Record volume is not a facility-risk, pollution, health-impact or compliance ranking.

Canonical source status

• Defra UK-AIR Sensor Observation Service: Quality validated for stated use within stated limitations. Downloaded records: 237; production usable: yes. Next: Use only within documented scientific and claim boundaries.
• Defra UK-AIR Atom downloads: Metadata/index only. Downloaded records: 0; production usable: no. Next: Harvest and validate underlying records; metadata is not measurement evidence.
• Imperial College London LAQN API: Quality checks passed; target linkage pending. Downloaded records: 766; production usable: no. Next: Complete comparator, meteorology and competing-source validation.
• Environment Agency Public Register: Records downloaded; validation pending. Downloaded records: 23,556; production usable: no. Next: Validate schema, units, time basis, quality flags and lineage.
• Planning Data API: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• National Atmospheric Emissions Inventory: Metadata/index only. Downloaded records: 0; production usable: no. Next: Harvest and validate underlying records; metadata is not measurement evidence.
• Department for Transport Road Traffic Statistics API: Records downloaded; validation pending. Downloaded records: 10,000; production usable: no. Next: Validate schema, units, time basis, quality flags and lineage.
• OpenAQ v3: Metadata/index only. Downloaded records: 0; production usable: no. Next: Harvest and validate underlying records; metadata is not measurement evidence.
• World Air Quality Index API: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• OpenWeather current conditions: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• Met Office Weather DataHub Land Observations: Records downloaded; validation pending. Downloaded records: 576; production usable: no. Next: Validate schema, units, time basis, quality flags and lineage.
• Met Office Weather DataHub Global Spot: Records downloaded; validation pending. Downloaded records: 10; production usable: no. Next: Validate schema, units, time basis, quality flags and lineage.
• Copernicus Atmosphere Monitoring Service: Records downloaded; validation pending. Downloaded records: 2; production usable: no. Next: Validate schema, units, time basis, quality flags and lineage.
• Copernicus Data Space STAC Sentinel-5P: Metadata/index only. Downloaded records: 0; production usable: no. Next: Harvest and validate underlying records; metadata is not measurement evidence.
• NASA Earthdata Common Metadata Repository: Metadata/index only. Downloaded records: 27; production usable: no. Next: Harvest and validate underlying records; metadata is not measurement evidence.
• PurpleAir API: Records downloaded; validation pending. Downloaded records: 286; production usable: no. Next: Validate schema, units, time basis, quality flags and lineage.
• NewsAPI: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• NewsData.io: Credential present; not harvested. Downloaded records: 0; production usable: no. Next: Run a minimal authenticated sample retrieval and validation test.
• SerpAPI: Credential present; not harvested. Downloaded records: 0; production usable: no. Next: Run a minimal authenticated sample retrieval and validation test.
• Companies House API: Credential present; not harvested. Downloaded records: 0; production usable: no. Next: Run a minimal authenticated sample retrieval and validation test.
• Google Drive legacy archive: Legacy archive disabled; not collected or scientifically used. Downloaded records: 0; production usable: no. Next: Keep disabled; do not collect, promote or use as scientific evidence.
• OpenAI API: Credential present; not harvested. Downloaded records: 0; production usable: no. Next: Run a minimal authenticated sample retrieval and validation test.
• Gemini API: Credential present; not harvested. Downloaded records: 0; production usable: no. Next: Run a minimal authenticated sample retrieval and validation test.
• UK-AIR Data Selector: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• SEPA Public Register: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• Natural Resources Wales Public Register: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• Northern Ireland environmental regulation records: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• Local authority planning portals: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• Environment Agency flood monitoring API: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• Ordnance Survey Data Hub: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• ONS Open Geography Portal: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• NOMIS / ONS population data: Credential present; not harvested. Downloaded records: 0; production usable: no. Next: Run a minimal authenticated sample retrieval and validation test.
• Index of Multiple Deprivation: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• Get Information About Schools: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• CQC care directory: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• Contracts Finder: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• Find a Tender Service: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• Waste Data Interrogator: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• WhatDoTheyKnow: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• ICO decision notices: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• OpenStreetMap / Overpass: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• Department for Transport Port Freight Statistics: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• NASA FIRMS VIIRS and MODIS active fire data: Records downloaded; validation pending. Downloaded records: 309; production usable: no. Next: Validate schema, units, time basis, quality flags and lineage.
• UK Pollutant Release and Transfer Register: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• Defra Local Air Quality Management and AQMA records: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• Local authority LAQM annual status and detailed assessment reports: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• National Highways WebTRIS traffic data: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• OHID Fingertips Public Health Data API: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• ONS Census and population APIs: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• European Environment Agency air quality data: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• EMEP/EBAS atmospheric composition observations: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• Natural England designated sites data: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.
• CEDA atmospheric and Earth observation archive: Credential present; not harvested. Downloaded records: 0; production usable: no. Next: Run a minimal authenticated sample retrieval and validation test.
• Google Earth Engine: Not configured. Downloaded records: 0; production usable: no. Next: Implement only after authority, licence and scientific utility review.

A source is not described as production usable merely because a credential exists, an endpoint responds or metadata is indexed.

Visual review layer

• Primary-data pipeline: pollutant time series 237 → fresh physical sites 129 → screening events 0 → executed cross-source joins 0 → source determinations 0.
• Legacy archive: 0 inventoried, 0 quarantined and 0 promoted through strict validation.
• UK-AIR / LAQN discovery status: UK-AIR index entries 544, source links 5316, LAQN endpoints 5/5. Index/endpoint availability is not equivalent to downloaded validated measurement records.
• Pollutant cards are benchmark/context cards only.
• Emissions, ambient monitoring, exposure and health outcomes remain separate evidence classes.

External interrogation readiness

SCC Air Quality is ready for methodology, provenance, linkage and data-gap interrogation. It is not ready for source attribution, permit-compliance conclusions, exposure modelling, health-effects assessment or comparative facility ranking.

### IAQM / AQEG / atmospheric-science review

• Are target-matching and monitor-selection rules sufficiently conservative?
• Are receptor, background and comparator monitors separated correctly?
• Are meteorology and time-alignment gates explicit before interpretation?

### Public-health and reference-value review

• Does the public output avoid unsupported health-causation claims?
• Are pollutant benchmarks separated from source attribution?
• Are vulnerability/receptor flags presented as context, not diagnosis?

### Clean Air Programme / Clean Air Fund / EEA

• Is the data provenance clear enough for reuse and challenge?
• Are data gaps visible and actionable?
• Are official networks and open-data feeds preserved with source URLs and access dates?

### UKWIN / ToxicoWatch / GAIA / Zero Waste reviewers

• Are permitting, compliance, emissions and waste-policy questions kept traceable?
• Are campaign-source materials separated from official records and peer-reviewed studies?
• Are alternative explanations and contrary evidence recorded before public claims?

### Named scientific reviewers and independent experts

• Which source record supports each statement?
• What uncertainty remains before a stronger claim could be made?
• What additional monitoring, modelling or records would materially improve confidence?

Readiness

Overall: Api led screening and evidence convergence not source determination

Public claim level: Screening and readiness notes only

Primary evidence policy: Current England operational-scope primary-source harvesting and reproducible cross-source joins lead analysis. Every release is limited to the geography actually evidenced. The legacy Google Drive archive is disabled and has no scientific influence.

Claim boundary: No causal, legal, medical, regulatory, laboratory, comparative-risk or source-attribution determination is made by the automated output.

{
  "comparator_checked": "not_applicable_no_fresh_screening_events_monitor_roles_pending",
  "meteorology_checked": "official_meteorology_acquired_no_event_alignment_not_applicable",
  "monitor_role_checked": "candidate_monitor_roles_unvalidated",
  "parser_validated": "quality_validated_current_measurements",
  "provenance_recorded": "complete_current_measurement_provenance",
  "reviewer_challenge_recorded": "claim_Framework started",
  "source_acquired": "complete_primary_measurements",
  "time_alignment_checked": "not_applicable_no_fresh_screening_events"
}

Next evidence tasks

• Acquire and time-align official Met Office observations for every discovered event.
• Validate comparator monitor roles and create explicit urban-background, roadside and rural-background classes.
• Acquire actual DfT/WebTRIS traffic observations rather than catalogue metadata.
• Resolve principal installation permits and operator identities using exact official identifiers.
• Integrate CAMS regional fields and other competing-source layers before any source-consistent hypothesis.
• Keep the legacy Drive archive disabled; reacquire any potentially useful historic record from its original publisher before independent validation.