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today's forecasts on AIRNow [exit DNR].
current air quality in Wisconsin.
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Contact information
For information on air quality and forecasts, contact:
Mike Majewski

Current air quality outlook

Department meteorologists use monitoring data along with weather predictions to determine when and where an air quality notice is needed. The meteorologists submit daily air quality forecasts for eight Wisconsin cities to EPA's AirNow website [exit DNR]. Below is the current air quality forecast, which will be updated as needed.

Monday, May 2 - Sunday, May 8, 2016

Note: The air quality standard for ozone has been lowered from 75 ppb to 70 ppb for an 8-hr average.


Mostly Good levels this week.

Particle pollution (PM2.5)

Mostly Good levels this week.

Weather outlook

Particle pollution (PM2.5) and ozone air quality are in the Good range across Wisconsin this Monday morning. Values should remain unchanged for the remainder of the day.

Westerly winds will bring warmer temperatures to Wisconsin on Tuesday ahead of an approaching cold front. Air quality should remain in the Good range.

Cooler air will filter back into the state on Wednesday with north-northeast winds. Temperatures will then gradually warm into Saturday. Air quality should remain in the Good range through Friday.

Another cold front is forecast to cross the region on Saturday. Some Moderate air quality readings are possible over the southern half of Wisconsin.

Air quality should drop back into the Good range for Sunday behind the frontal passage.

Warmer air will head back across the Midwest on Monday along with chances of Moderate air quality.

Air Quality Index (AQI) ranges

For more information, see the U.S. EPA's Air Quality Index - A Guide to Air Quality and Your Health [exit DNR].

Color coded chart showing ozone and fine particle concentration ranges for each AQI level
AQI Levels
of Health Concern
Numerical Value 8-hr Ozone (ppb) 24-hr PM2.5 (ug/m3)
Good 0-50 0-54 0.0 to 12.0
Moderate 51-100 55-70 12.1 to 35.4
Unhealthy for Sensitive Groups 101-150 71-85 35.5 to 55.4
Unhealthy 151-200 86-105 55.5 to 140.4
Very Unhealthy 201-300 106-200 140.5 to 210.4
Hazardous > 300 > 201 > 210.4
Last revised: Monday May 02 2016