![AQI: Good (0 - 50)](https://webarchive.library.unt.edu/web/20161225054357im_/https://www.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/20161225054357im_/https://www.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/20161225054357im_/https://www.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/20161225054357im_/https://www.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/20161225054357im_/https://www.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/20161225054357im_/https://www.airnow.gov/images/actionday.gif)
Local Air Quality Resources | ||
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