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 ...

With wildfire smoke in the forecast, track the drop in air quality across dozens of PurpleAir sensors with our live, updating ...

Air quality is unhealthier-than-average for some people Thursday as winds are blowing wildfire smoke across the Northern ...

What is the Air Quality Index? The Environmental Protection Agency breaks down the six different air quality categories on its AQI website. "Think of the AQI as a yardstick that runs from 0 to 500.

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 alert comes as humidity is expected to increase Tuesday, with high temperatures in the mid 80s to low 90s, with heat indices reaching 100 by Wednesday.

MIchigan's air quality will be unhealthy for some groups Saturday. Check the air quality index map to see if it's good or bad ...

Delhi experienced its cleanest air since September 2023, with the AQI reaching the 'good' category due to rain and favorable winds.

Parts of Ontario experienced some of the worst air quality in the world Monday due to wildfire smoke. Learn if health ...

COVID-19 lockdowns resulted in better air quality due to decreased commercial activity and automobile traffic. The lifting of lockdowns and a recent surge of wildfires in Western and Mountain states ...