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, October 20 - Sunday, October 26, 2014

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

Particle pollution (PM2.5)

Good air quality this week.

Weather outlook

PM2.5 air quality is in the Good range this Monday morning across Wisconsin. A cold front will pass through southern Wisconsin early today. Clouds will increase later this morning and linger through the evening. High pressure behind the front will bring quiet weather and cool temperatures to the region through Wednesday. Another trough of low pressure will bring a chance for rain showers on Thursday. Quiet weather and mild temperatures are likely next weekend. Air quality should remain in the Good range through the week. With warmer temps and light southerly winds possible next weekend there is some possibility the PM2.5 levels may reach the Moderate range at a random site.

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 October 20 2014