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.

Smoke from several wildfires in the Los Angeles, California area is affecting air quality in portions of the state. Check the AirNow Fire and Smoke Map for local air quality conditions, fire locations and smoke plumes.

Smoke from several wildfires in the Los Angeles, California area is affecting air quality in portions of the state. Check the AirNow Fire and Smoke Map for local air quality conditions, fire locations and smoke plumes.

This map shows fine particle pollution from wildfires and other sources. It does not show air toxics or other pollutants. For ozone, go to AirNow . Learn more about this map

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.

Air Quality Guide for Nitrogen Dioxide This guide provides you with information about ways to protect your health when nitrogen dioxide levels reach the unhealthy range, and ways you can help reduce nitrogen dioxide air pollution.

Smoke from several wildfires in the Los Angeles, California area is affecting air quality in portions of the state. Check the AirNow Fire and Smoke Map for local air quality conditions, fire locations and smoke plumes.

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.

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 for you. When you know the AQI in your area, you can take steps to protect your health.

A circle for each daily air quality forecast, with its AQI color, AQI number (if available), and the primary pollutant, which is the pollutant that is expected to have the highest overall AQI for the day.