Air-quality forecasting & source attribution
Know what you breathe — and where it comes from.
AI-corrected PM2.5 forecasts up to 5 days ahead, with source attribution, for cities on six continents — including cities without a single air-quality monitor.
Live map
Today’s air, city by city
Circles show today’s forecast on the US EPA Air Quality Index (24-hour PM2.5). Pick a city on the map or in the list for its forecast, pollution sources and the reasons behind them.
AQI today
Why it matters
When the monitors went dark
For many cities in Africa and Asia, the US Department of State’s embassy monitors were the only public, reference-grade PM2.5 measurements. Most of them have stopped reporting.
US embassy PM2.5 monitors reporting each month
Monitors in AirNow data files