Air Quality Alert issued June 16 at 12:24PM EDT by NWS Grand Rapids MI

Air Quality Advisory for June 17, 2025

The Michigan Department of Environment, Great Lakes, and
Energy (EGLE) has declared an Air Quality Advisory for
June 17 for elevated levels of ozone in several western lake
shore counties.

Pollutants within those areas are expected to be in the Unhealthy
for Sensitive Groups (USG, Orange AQI) range.

The Air Quality Advisory is in effect for the following Michigan
counties: Allegan, Kent, Muskegon, Ottawa, and Van Buren

All signs point towards the likely development of elevated ozone
along the several lake shore counties. Elements such as wind
direction, temperature, dew points, upper air conditions all point
towards the likelihood that could see ozone concentration in the
Unhealthy for Sensitive Groups (USG) range along those counties.
Cloud cover is uncertain during the peak heating hours of the day,
but enough sun will likely be present to trigger the photochemical
reactions necessary to generate ozone.

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
ozone 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.

For further information, please see EPAs Air Now site for up-to-
date air quality data:

https://www.airnow.gov/