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AirNow is your one-stop source for air quality data. Our recently redesigned site highlights air quality in your local area first, while still providing air quality information at state, national, and world views.
Local air quality can affect our daily lives. Like the weather, it can change from day to day. EPA developed the Air Quality Index, or AQI, to make information available about the health effects of the five most common air pollutants, and how to avoid those effects.
The AirNow system automatically generates this list every hour, based on the areas with the highest NowCast AQI for ozone or particle pollution. Because air quality can change during the day, the areas on this list may change throughout the day, too.
AirNow is your one-stop source for air quality data. Our website and app highlights air quality in your local area first, while still providing air quality information at state, national, and world views.
The U.S. Air Quality Index (AQI) is EPA's tool for communicating about outdoor air quality and health. The AQI includes six color-coded categories, each corresponding to a range of index values. The higher the AQI value, the greater the level of air pollution and the greater the health concern.
Get a quick view of today and tomorrow’s air quality forecasts plus any action day notices. Hover over or tap images and text to find definitions and links to more information. Enter a new zip code, city, or state in the search box, or click the locator icon.
Use the Air Quality Index (AQI) to learn more about your local air quality and the best times for your outdoor activities.
The app automatically displays the current AQI (Air Quality Index) for your local area or any area you wish to check, and allows you to store multiple areas for quick reference. The app also includes the AirNow Fire and Smoke map, which the EPA produced in partnership with the U.S. Forest Service.
This map shows fine particle pollution (PM2.5) from wildfires and other sources. It provides a public resource of information to best prepare and manage wildfire season. Developed in a joint partnership between the EPA and USFS.
This new version features an updated display that allows you to get a quick glance at information, tailored user interfaces for both desktop and mobile, and faster loading. Learn more about the Fire and Smoke Map. Get Current and Forecast Air Quality for Your Area.