According to air quality data from 2021 to 2023, about 156 million people – 25 million more than last year’s report – live in an area that the association gives a failing grade for ozone and ...

Here's how to interpret the Air Quality Index values, according to the U.S. EPA: Good (0-50): The level of pollution in the air is of little to no risk. Moderate (51-100): For people who are ...

Good (0-50): The level of pollution in the air is of little to no risk. Moderate (51-100): For people who are unusually sensitive to air pollution, a moderate health concern may exist. Unhealthy ...