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, February 23 - Sunday, March 1, 2015

Note: Ozone forecasts will resume in late April, when the 2015 ozone season begins.

Particle pollution (PM2.5)

Mostly Good air quality this week.

Weather outlook

PM2.5 air quality is in the Good range this Monday morning across Wisconsin.  A northwest flow in the upper atmosphere will keep cold air over the Midwest for most of the upcoming week.

Brisk southwest winds will develop today and bring some moderation in temperatures into Tuesday. A cold front passing through the state later Tuesday will usher in the next surge of arctic air. This cold air will remain over the Midwest through the end of the week. Air quality should remain in the Good range for the work week.

Winds will turn southerly and push warmer air and more moisture toward the region next weekend. Conditions will become more favorable for Moderate levels of PM2.5.

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 0-59 0.0 to 12.0
Moderate 51-100 60-75 12.1 to 35.4
Unhealthy for Sensitive Groups 101-150 76-95 35.5 to 55.4
Unhealthy 151-200 96-115 55.5 to 140.4
Very Unhealthy 201-300 116-374 140.5 to 210.4
Hazardous > 300 > 374 > 210.4
Last revised: Monday February 23 2015