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This is not the current AirNow website. To navigate to the current AirNow website, please go to airnow.gov. This website is historical material reflecting the AirNow website as it existed on April 15, 2020. Links to external websites and some internal pages may not work.

AirNow Announcements

AirNow Website Updated April 15, 2020

This is an archived version of the AirNow website. To navigate to the current AirNow website, please go to airnow.gov. If you have questions, let us know.

Airnow is currently experiencing technical issues which are stopping our maps from updating. We are working to resolve this issue and are sorry for the inconvenience.

Updated AirNow Website – Preview

The updated AirNow website is coming April 15! You can preview the site here. When we go live this spring, you’ll see the updated site any time you visit airnow.gov. If you have questions, let us know.

Want to know about the potential for significant wildfires where you live? Check the National Interagency Fire Center’s Outlooks page at https://go.usa.gov/xd9mN to learn more. Even if predictions don’t show a significant wildfire risk for your area, you should prepare for fire season if you live a wildfire-prone area. The Wildfire Smoke Fact Sheet: Prepare for Fire Season has tips to help you get ready at https://go.usa.gov/xd9mX.

The potential for significant wildland fires in California continues through December. Some air monitors may be down due to power outages. If you see or smell smoke, protect your health by checking Wildfire Guide Factsheets.
Smoke advisories and forecasts for local air agencies.

11/1/19: WILDFIRE SMOKE and DUST STORMS continue to impact the San Francisco, Los Angeles, Santa Barbara, Ventura County, and the San Joaquin Valley areas. Some air monitors are down due to fires and power outages. If you see or smell smoke, protect your health by following the steps in the Wildfire Guide Factsheets. Smoke advisories and forecasts for local air agencies.

10/31/19: WILDFIRE SMOKE and DUST STORMS continue to impact the San Francisco Bay Area, Los Angeles Area, and the San Joaquin Valley. Some air monitors are down due to fires and power outages. If you see or smell smoke, protect your health by following the steps in the Wildfire Guide Factsheets. For the latest air advisories, visit Bay Area AQMD and South Coast AQMD and the San Joaquin Valley APCD websites.

10/28/19: WILDFIRE SMOKE: Smoke is impacting the San Francisco Bay Area and Los Angeles Area. For the latest air advisories visit Bay Area AQMD and South Coast AQMD.
10/28/19: DUST STORMS: The San Joaquin Valley may experience elevated AQI levels due to dust storms. For the latest air advisories visit the San Joaquin Valley APCD website.
10/27/19: DUST STORMS: Great Basin and Central Valley, CA, and the Pahrump, NV areas are experiencing elevated AQI levels this morning due to dust storms. For the latest air advisories visit the Great Basin UAPCD, Sacramento Metro AQMD, San Joaquin Valley UAPCD, CARB, and Nevada DEP websites.

10/25/19: AirNow is experiencing high traffic due to the CA wildfires. There will be brief, intermittent downtimes over the course of the day as we adjust to handle high traffic volume.

October 10, 2019: AirNow may experience times when it is unable to update maps and data as PG&E restores power in California. Please check your state or local air agency website for the latest information on air quality at your location. A list of state and local agencies is available here. We apologize for the inconvenience.

The 2019 document Wildfire Smoke: A Guide for Public Health Officials is now available. This document is produced by the California Air Resources Board and Office of Environmental Health Hazard Assessment, and the US Centers for Disease Control and Prevention, Environmental Protection Agency, and Forest Service.

October 9, 2019: AirNow is currently unable to update maps because of the PG&E power cut in California. Please check your state or local air agency website for the latest information on air quality at your location. A list of state and local agencies is available here. We apologize for the inconvenience.

EPA has updated the NowCast for ozone – the technical method used to show current ozone values on AirNow.gov and will be making it live on 8/1/19. Using this improved method, current ozone conditions will more closely represent the 8-hour average value for ozone air quality and should be more consistent with the daily AQI value. For more information, please visit https://github.com/USEPA/O3-Nowcast/tree/master