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, September 15 - Sunday, September 21, 2014

Ozone and particle pollution (PM2.5)

Mostly Good air quality this week.

Weather outlook

Ozone and PM2.5 air quality is in the Good range Monday morning across Wisconsin. Clouds and passing rain showers ahead of a cold front will keep air quality in the Good range Monday. High pressure will build into the Midwest behind the front and provide Good air quality and pleasant weather through Thursday. By Friday the high pressure will be off to the east and southerly winds will develop bringing warmer and more humid air into the region. A low pressure system passing through Wisconsin will bring a chance for rain on Saturday. Northerly winds behind the low will develop on Sunday. Air quality should remain in the Good range next weekend with only marginal chances for spotty Moderate levels.

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 September 15 2014