About AirScope
AirScope brings transparent, global air-quality data to everyone — no account, no ads, no paywall.
How it works
We read live and forecast air-quality data from the Open-Meteo Air Quality API, which is built on the Copernicus Atmosphere Monitoring Service (CAMS). Readings are cached in our own database so we serve you fast and stay within fair-use limits.
What is AQI?
The Air Quality Index converts pollutant concentrations into a single number on a colour scale. A higher number means more pollution and greater health risk. AirScope supports both the US EPA AQI and the European EAQI.
US AQI
EU AQI
The US AQI (EPA) and European AQI (EEA) use different scales and breakpoints. We show which one you've selected on every reading.
Methodology
Europe uses the higher-resolution 11 km CAMS domain; the rest of the world uses the 45 km global domain, so small differences can appear at borders.
Disclaimer
AirScope is for general information only and is not medical advice. Modelled data can differ from local ground stations. If you have health concerns, follow guidance from your doctor and local authorities.