The air quality forecast is a prediction of the day’s overall AQI issued by state and local air quality forecasters. Each polygon on this map represents a reporting area that issues a forecast.

This map displays data from reference-grade air quality monitors at U.S. embassies and consulates around the world. Fine particulate matter (PM2.5) data is available for all sites, and ozone data is …

Read EPA's annual air trends report, Our Nation's Air, to learn about air quality improvements to protect human health and the environment.

Read EPA's annual air trends report, Our Nation's Air, to learn about air quality improvements to protect human health and the environment.