![AQI: Good (0 - 50)](https://webarchive.library.unt.edu/web/20170118234651im_/https://airnow.gov/images/aqi_good_text.gif)
Air quality is considered satisfactory, and air pollution poses little or no risk.
![AQI: Moderate (51 - 100)](https://webarchive.library.unt.edu/web/20170118234651im_/https://airnow.gov/images/aqi_mod_text.gif)
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)](https://webarchive.library.unt.edu/web/20170118234651im_/https://airnow.gov/images/aqi_usg_text.gif)
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)](https://webarchive.library.unt.edu/web/20170118234651im_/https://airnow.gov/images/aqi_unh_text.gif)
Everyone may begin to experience health effects members of sensitive groups may experience more serious health effects.
![AQI: Hazardous(301 - 500)](https://webarchive.library.unt.edu/web/20170118234651im_/https://airnow.gov/images/aqi_haz_text.gif)
Health warnings of emergency conditions. The entire population is more likely to be affected.
![Action Day](https://webarchive.library.unt.edu/web/20170118234651im_/https://airnow.gov/images/actionday.gif)
Highest 5: |
About the Highest 5 |
- Today's Forecasts
- Tomorrow's Forecasts
- Current AQI
Boise, ID |
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Salmon, ID |
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Minneapolis-St. Paul, MN |
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Franklin, ID |
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Keene, NH |
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North Pole, AK |
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Franklin, ID |
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Helena, MT |
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Logan, UT |
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Salt Lake City, UT |
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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 here.
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
10/28/16: The October Air Quality Flag Program Newsletter
is now available. For past newsletters click here.
8/11/16: AirNow pre-event at the 17th World Clean Air Congress & 9th Better Air Quality Conference, 29 August – 2 September 2016, Busan, South Korea. More