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.
As thousands of acres burn across Southern California, wildfire smoke is causing poor air quality in the region and beyond.
Air quality in Western Pennsylvania dropped ... AirNow.gov predicted that Pittsburgh’s AQI would reach 130 on Thursday and 100 on Friday. The Pittsburgh region was forecast to see code orange ...