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

The current infrastructure also isn’t set up to fully account for the shifting behavior of wildfire smoke, which can travel ...

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 ...

The data that goes into the Air Quality Index comes from 5,000 air monitors across the country, including local, state, ...

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

The air quality index score is expected to rise to 105, which falls into the "unhealthy for sensitive groups" range of 100-150. The AQI scale is from 0 to 500. Higher numbers indicate worse air ...

If the air feels a little heavier today, you're not imagining it. A health advisory for elevated air pollution levels remains in effect through 11 p.m. today, Wednesday, June 25, across much of the ...

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 ...

PHILADELPHIA (WPVI) -- The National Weather Service has declared an "Orange" air quality alert in the Philadelphia metro area and several New Jersey counties for Thursday. In Pennsylvania, Bucks ...

Calgary, Edmonton, Red Deer, Saskatoon, and Regina are among the Prairie populations exposed to the dense smoke, which caused the Air Quality Health Index (AQHI) level to max out at 10+.

At one point this morning, Bismarck’s air quality index, or AQI, climbed above 200. That level is considered “very unhealthy” by federal standards, and it’s rare for an American city to ...

Air quality alerts are issued when the Air Quality Index (AQI) exceeds 100. Today, it's expected to reach 105. An AQI in the 101-150 range is considered "unhealthy for sensitive groups," including ...