The National Weather Service (NWS) has issued Air Stagnation Advisories across four cities, warning of deteriorating air quality due to stagnant atmospheric conditions trapping pollutants near the ...

The EPA measures regional air quality index (AQI) by how hazardous it is to the general public. Discover the AQI in your city by searching below.

The Air Quality Index (AQI) is an index for reporting daily air quality. It tells you how clean or polluted your air is, and what associated health effects might be a concern for you. For more ...