Compare indicators on a consistent scope
Document definition, unit, population, period and revisions before comparing figures.
Read the practical method →National reference database for air quality, providing measurements, statistics, history, maps and an API.
Resource identity and purpose checked against the source on . This check does not verify all service conditions or individual data records.

Data and artificial intelligence · France
Open the original resourcePrepare air-quality analysis by checking stations, pollutants and periods.
Separate observations, histories and forecasts. Retain pollutant, unit, station and period before comparing results.
This factsheet helps document data; it gives no medical advice or individual exposure conclusion.
Observation or forecast.
Pollutant, unit and station.
Period and result status.
Document definition, unit, population, period and revisions before comparing figures.
Read the practical method →Geod’air — primary source. Link checked . The checklist is editorial guidance; link availability does not guarantee completeness or suitability.
Read the editorial method · Report a correction with its source