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.

Smoke from the Shoe Fire will pollute Redding and Shasta County air this week.Here's what happened Tuesday and what to expect ...

It comprises two measures: the number of days with an air quality index below a certain threshold and the number of violation points against drinking water systems in each state. Learn more about ...

Smoke from the Shoe Fire in Shasta County is negatively impacting air quality across Northern California. KCRA 3 ...

Ash from the recent series of major wildfires that tore through the Southland last month has been blown through the Los ...

Ozone is a gas comprised of three oxygen (O3) atoms. It is unstable and reacts easily to other gases. In its natural state, it is a component in several levels of the atmosphere. At high altitudes ...

In the U.S., one measure of outdoor air pollution is the Air Quality Index, or AQI which rates air conditions across the country based on concentrations of five major pollutants: ground-level ...

Our air quality can change to unhealthy levels throughout the year, even when the skies don't necessarily look bad.

The Oregon Department of Environmental Quality issued another air quality advisory Wednesday for Deschutes County due to smoke from new and older wildfires still burning around the region. DEQ said ...

Nasa said winds usually carry smoke from wildfires in the Quebec area east and out to sea but ... Data from the US Environmental Protection Agency's Air Quality Index (AQI) shows that cities ...

To help you choose the best air quality monitor for your next adventure, we reviewed several top models. To test the air quality monitors, I first set them up in different rooms in my home and ...

Click on the map below to view your local air quality health index. You can search for major cities across Canada and bookmark your favourites by clicking the star icon. To help Canadians get an ...