Public-health interpretation boundary
This Air Quality Project keeps emissions, ambient concentrations, exposure and health outcomes separate. health-based reference-value contexts are used only as health-context prompts; they do not identify the source of pollution.
Health-based reference-value context
fine particulates / proxy evidence context
Benchmark ready: no attributionparticulates; UKHSA notes PM10 can be a proxy for other emissions in some evidence
Benchmark ready: no attributioncombustion-related nitrogen oxides context
Benchmark ready: no attributionacid gas / combustion context
Benchmark ready: no attributionsecondary pollutant context, not direct stack marker
Benchmark ready: no attributioncombustion-efficiency context
Benchmark ready: no attributionchlorinated/fluorinated acidic gases
Permit matrix neededabatement/slip and secondary particulate chemistry context
Permit matrix neededmetals including lead, zinc, chromium, mercury and others where reported
Permit matrix neededrequires specialist sampling, stack/permitting and biomonitoring evidence
Manual review requiredBenchmark cards are public-health context only. They are not source-attribution findings.
Source-attribution caution
The automated site must not collapse these evidence classes into a single causal claim.
UKHSA-style balance
The public output is framed to support evidence review and challenge. It does not override regulator, public-health or permit determinations, and it does not assert that a modern regulated facility is or is not a significant public-health risk.
Scientific evidence and software assurance are different
Scientific evidence
Measurements, station and regional coverage, descriptive calculations, source records and stated limitations are the evidence available for review.
Engineering assurance
Automated checks confirm that the pipeline followed its declared rules. They do not constitute peer review, accreditation, regulatory approval or institutional endorsement.