The Iowa DNR on Tuesday issued a statewide Air Quality Alert through 6 a.m. Thursday. The agency warned that the Air Quality Index may reach the red or unhealthy category in affected areas.

But the air quality index, which had reached the mid-200 range, or “very unhealthy” on Tuesday, was down to 60, or “moderate,” by Wednesday afternoon.

Maroon: Hazardous (301+) As of 9 a.m. on June 4, AirNow.gov was forecasting the air quality index in parts of New Jersey to move into the "unhealthy for sensitive groups" category with an AQI of 105.

As of 9 a.m. on Friday, June 6, here are the air quality index readings, according to AirNow's Air Quality Index: Ann Arbor: PM2.5 of 135; unhealthy for sensitive groups.

On Thursday, June 5, an air quality alert is in place for 15 counties in the UP: Alger, Baraga, Chippewa, Delta, Dickinson, Gogebic, Houghton, Iron, Keweenaw, Luce, Mackinac, Marquette, Menominee ...

Canadian wildfire smoke continues to affect air quality across much of the eastern and central United States, including Iowa. An air quality alert will be in effect for all of Wednesday, June 4.

As of 9 a.m. Wednesday, June 4, the air quality rating in Marquette was considered unhealthy with a PM2.5 of 155 (particulate matter of 2.5 micrometers or less).

Air quality in Grand Rapids deteriorates amid wildfire smoke, posing health risks. Forecasts predict improvement by weekend. Stay updated with AirNow.

As of 9 a.m. Wednesday, June 4, the air quality rating in Marquette was considered unhealthy with a PM2.5 of 155 (particulate matter of 2.5 micrometers or less).

In Lansing, as of 10 a.m. on June 4, AirNow's Air Quality Index reflected a "moderate" reading with a PM2.5 of 81 — meaning the sensitive groups may be harmed by poor air quality, and people ...

Air quality worsens in eastern U.S. as Canadian wildfire smoke hangs over Midwest Smoke from Canadian wildfires can be seen partially obscuring the skyline of downtown Kansas City, Mo., on Wednesday.

The map also showed purple for "very unhealthy" across much of the Minneapolis-St. Paul metropolitan area, where the Air Quality Index numbers of 250 and were common, though conditions started to ...