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, April 14 - Sunday, April 20, 2014

Note: Ozone forecasts will resume in April, when the 2014 ozone season begins.

Particle pollution (PM2.5)

Mostly Good air quality this week.

Weather outlook

PM2.5 air quality is generally in the Good range this Monday morning across Wisconsin. Northerly winds behind a departing weather system are funneling cold and clean air across the region. This will last into Tuesday. Winds will turn southerly later Tuesday and Wednesday and will become breezy as a strong low pressure system moves into western Wisconsin by Wednesday evening. Air quality is expected to remain in the Good range into Thursday. Winds will turn southerly and be light on Friday as another low pressure system heads toward the region. A period of light winds is shaping up for next weekend, which could lead to favorable conditions for Moderate air quality.

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 April 14 2014