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, August 18 - Sunday, August 24, 2014

Ozone and particle pollution (PM2.5)

Mostly Good air quality early this week with Moderate possible next weekend.

Weather outlook

Ozone and PM2.5 air quality is in the Good range this Monday morning across Wisconsin. Rain showers and storms are possible late this afternoon across southern Wisconsin; this will help keep air quality in the Good range. A low pressure system will move across the state on Tuesday with rain showers gradually ending. Westerly winds behind the departing system will keep air quality in the Good range through Wednesday. A warm front moving towards the region will bring more rain chances Wednesday night into Thursday. The expected cloud cover and rain should maintain the Good air quality for Thursday. The exact position of the frontal boundary will play an important role in determining possible Moderate or higher air quality next weekend. As of now, the forecast calls for Moderate air quality next weekend.

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 August 18 2014