Daily AQI Color | Levels of Concern | Values of Index |
Yellow | Moderate | 51 to 100 |
Orange | Unhealthy for Sensitive Groups | 101 to 150 |
Red | Unhealthy | 151 to 200 |
Purple | Very Unhealthy | 201 to 300 |
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Get air quality data where you live. ; Air Quality Index Scale ; 0 - 50. Good ; 51 - 100. Moderate ; 101 - 150. Unhealthy for Sensitive Groups (USG) ; 151 - 200.
The list below shows the areas with the highest NowCast AQI for the current hour. The AirNow system automatically generates this list every hour, ...
The Air Quality Index is based on measurement of particulate matter (PM2.5 and PM10), Ozone (O3), Nitrogen Dioxide (NO2), Sulfur Dioxide (SO2) and Carbon ...
Air Now Logo. Interactive Map of ... U.S. Air Quality Index. Good (0-50). Moderate (51 ... Click “Plot Data” to see an AQI bar chart and a concentration line graph.