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.

Poor air quality can affect your lungs, heart, and immune system. Stay hydrated, eat foods rich in antioxidants, and check AQI before leaving your home for work or other purposes.

Air quality changes consistently. Depending on the different pollutants in the air that come from natural and human activity, some days can be easier to breathe than others. Air quality indexes ...