Canadian wildfire smoke is again putting Minnesota under a statewide air quality alert that will last until 5 p.m. Saturday.

Canadian wildfire smoke no longer lingers in Michigan as of July 18. Southwest Michigan will experience unhealthy air for sensitive groups on July 21.

An air quality alert was issued in Delaware on Tuesday, July 29, as ozone levels reached unhealthy levels for sensitive ...

An Air Quality Alert has been issued for parts of northern New York and Vermont today because of Canadian wildfire smoke.

The Mid-Ohio Regional Planning Commission on July 30 issued an air quality alert for Columbus and several central Ohio counties, warning that it's expected to become unhealthy for sensitive groups.

An air quality alert was issued by the National Weather Service in Mount Holly at 3:45 p.m. on Monday, July 28. This warning ...

Multiple states in the mid-to-upper Midwest have been flagged as unhealthy for sensitive groups and unhealthy for the overall population, regardless of health conditions, according to the U.S ...

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As of 8 a.m., multiple air quality sensors are reporting readings in the “Unhealthy for Sensitive Groups” (AQI 101–150) to “Unhealthy” (AQI 151–200) range.

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“These conditions will allow ozone to reach the Unhealthy for Sensitive Groups (USG) category in areas along and south of the I-95 corridor.