Each Air Quality Index category, also known as the level of concern, is attached to a certain range of values: Good (green): 0 to 50; Moderate (yellow): 51 to 100; ...

The Air Quality Index (AQI) is used by various government agencies to report how clean or polluted the air is in your area. For example, you may have spotted this metric popping up in local ...

When skies are smoky or hazy, there’s a good chance that the air quality has dropped to unhealthy levels. To determine this, we rely on the air quality index (AQI). Watch this video to see what ...

The national average air quality index in 2023 was 38, according to IQAir, a Swiss air quality technology company. More than 100 nations had cleaner air , on average, than the United States, and ...

The Air Quality Health Index was first created to show possible health and environmental impacts to vegetation, visibility and human and animal health.

With smoke from Canadian wildfires expected to continue affecting affect Michigan this summer, knowing how to check the air ...

Air quality in the U.S. is measured by the Environmental Protection Agency (EPA) using an air quality index (AQI), which rates air quality on a scale of zero to 500.

Since the Clean Air Act of 1970, air quality has greatly improved in the United States, and people are increasingly concerned about the environment and the air we breathe. Sensitive ecosystems are ...

The Air Quality Index does not take into account many gas or particle contaminants that are produced during wildfires, particularly when houses, cars and other man-made materials go up in flames.

What does PM2.5 mean on the air quality index? This unit is used to measure the fine particulate matter in the air, such as, smoke, dust, soot or dirt. The "2.5" figure means particles are 2.5 ...