Air Quality Alert issued June 21 at 11:05AM EDT by NWS Grand Rapids MI

The Michigan Department of Environment, Great Lakes, and Energy (EGLE)
has declared an Air Quality Advisory for June 21 and June 22, 2025,
for elevated levels of ozone in western counties of Michigan.
Pollutants within those areas are expected to be in the Unhealthy for
Sensitive Groups (USG, Orange AQI) range.

The Air Quality Advisory for Saturday and Sunday is in effect for
the following Michigan counties:

Allegan, Kent, Muskegon, Ottawa, and Van Buren

We are in the peak of ozone season, and the current forecast shows
ozone-conducive conditions for Saturday and Sunday. Surface temperatures
in the 90s, coupled with ample sunlight and southwest winds, create
an environment favorable for ozone development along the Lake
Michigan shoreline.

It is recommended that, when possible, you avoid strenuous outdoor
activities, especially those with respiratory diseases such as asthma.

People and businesses are urged to avoid activities which can lead to zone
formation. These activities include:

refueling vehicles or topping off when refueling;
using gasoline powered lawn equipment;
using charcoal lighter fluid.

Positive activities include:

driving less;
telecommuting;
walking or bike riding;
delaying or combining errands;
using water-based paints.