waqi
Query real-time and forecast air quality (AQI) data from the World Air Quality Index project (WAQI/AQICN). Use when checking air quality, PM2.5, pollution levels, or AQI for any city or coordinates worldwide. Supports city name lookup, geo-coordinate queries, station search, and multi-day PM2.5/PM10/O3 forecasts. Also known as aqicn.org.