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The GAIA air quality monitor uses laser particle sensors to measure in real-time PM2.5 and PM10 particle pollution, which is one of the most harmful air pollutants.
Use the IQAir California air quality map to discover air pollution levels across the state and help attribute city air quality to the emission source. Follow health recommendations when air quality levels exceed “good” standards.
Live most polluted major city ranking. Keep track of the most polluted cities in the world with our air quality index (AQI) ranking.
6 maj 2024 · The following spreadsheets provide air quality status and trends for counties and cities, defined as CBSAs (Core-Based Statistical Areas), with monitoring data. These tables are based on data from EPA's AQS (Air Quality System) database as of May 2, 2023.
Click on a tile below to learn more about air quality monitoring in California. PM2.5; AQI; AB 617; Air Districts; Monitoring Technology; Fires
Within California, 50 out of 58 counties could be graded for at least one measure of air quality. You can make a difference in the air that you breathe. California reports data on 48 out of 58 counties. Counties with no ozone data are not shown.
Smoke from numerous wildfires across Alaska 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.
