AQI: Good (0 - 50)Air quality is considered satisfactory, and air pollution poses little or no risk.
AQI: Moderate (51 - 100)Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
AQI: Unhealthy for Sensitive Groups (101 - 150) Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.
AQI: Unhealthy (151 - 200) Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.
AQI: Very Unhealthy (201 - 300)Health alert: everyone may experience more serious health effects.
AQI: Hazardous (301 - 500)Health warnings of emergency conditions. The entire population is more likely to be affected.
Action Day
| Highest 5: |
| About the Highest 5 |
- Current AQI
- Today's Forecasts
- Tomorrow's Forecasts
| Hidden Valley, AZ |
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| Liberty/Clairton area, PA |
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| Birmingham, AL |
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| Brownsville-McAllen, TX |
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| Dayton, OH |
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| San Juan County, NM |
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| C San Bernardino M, CA |
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| E San Bernardino, CA |
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| C San Bernardino-1, CA |
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| C San Bernardino-2, CA |
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| Westport, CT |
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| Bridgeport, CT |
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| Stratford, CT |
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| Middletown, CT |
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| Danbury, CT |
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Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the Hazardous category. Additional information on reducing exposure to extremely high levels of particle pollution is available.
Fires: Current Conditions |
| Click to see map |
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U.S. Embassies and Consulates Data from air quality monitors at select U.S. embassies and consulates around the world |
Announcements
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
