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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 23 - Monday, May 30, 2016


A mix of Good and Moderate levels this week.

Particle pollution (PM2.5)

A mix of Good and Moderate levels this week.

Weather outlook

Particle pollution (PM2.5) and ozone air quality are in the Good range across Wisconsin this Monday morning. With mostly sunny skies and warming temperatures the ozone values are expected to rise into the Moderate range and possibly reach Unhealth for Sensitive Groups (USG) levels at some sites today.

A more active weather pattern will begin on Tuesday when a weak cold front makes is way across the state. This front will stall across the region and be a focus for showers and storms for most of the week. Although temperatures will be above normal, several waves of low pressure will move through the Midwest continuing the chances for rain and showers.

Air quality should be mostly in the Good range but may reach Moderate levels if there are long enough breaks in the cloud cover.

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 23 2016