U.S. Environmental Protection Agency (EPA), National Oceanic and Atmospheric Administration (NOAA), National Park Service, NASA, Centers for Disease Control and Prevention, U.S. Forest Service, U.S. Department of State
AirNow is a one-stop source for air quality data. AirNow reports air quality using the official U.S. Air Quality Index (AQI), a color-coded index designed to communicate whether air quality is healthy or unhealthy.
The AQI is calculated for four major air pollutants regulated by the Clean Air Act: ground level ozone, particle pollution, carbon monoxide, and sulfur dioxide. For each of these pollutants, EPA has established national air quality standards to protect public health. Of these, ground-level ozone and airborne particles are the two pollutants that pose the greatest threat to human health.
AirNow’s centralized data system provides quality control, national reporting consistency, and the ability to distribute data to the public, researchers, businesses, educators, and to other data systems. In AirNow, you’ll find:
- Current and forecast air quality maps and data for more than 500 cities across the U.S.
- Current and historical data for U.S. Embassies and Consulates around the world
- Current fire conditions including fire locations, smoke plumes, and air quality data from permanent and temporary air quality monitors
- Air quality data for Canada and Mexico
- Enviroflash emails, apps, widgets, and an API
- Health and air quality information for the public, healthcare professionals, teachers and students, and weathercasters.
AirNow is a partnership of the EPA, NOAA, National Park Service, NASA, Centers for Disease Control, and tribal, state, and local air quality agencies.