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Noise monitoring program
Active Air Quality Notification
  • The Wisconsin Air Quality Monitoring Data map will undergo an upgrade on Monday, September 8th. Some parts of the map functionality may be affected during the transition. To view current air quality in Wisconsin outside of DNR’s website, visit EPA’s AirNow map.

Highest Ozone

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Monday, 
County Site Units 8-Hour Hour of Day 1-Hour Hour of Day
Outagamie Appleton ppb 39.5 06 PM 45.2 05 PM
Ashland Bad River Tribal School ppb 30.9 07 PM 33.2 05 PM
Milwaukee Bayside ppb 44.5 09 PM 47.4 05 PM
Rock Beloit-Converse ppb 36.3 04 PM 37.5 02 PM
Kenosha Chiwaukee Prairie ppb 61.9 10 PM 67.4 06 PM
Columbia Columbus ppb 32.7 04 PM 36.2 03 PM
Sauk Devils Lake ppb 32.5 03 AM 31.1 03 PM
Eau Claire Eau Claire DOT Sign Shop ppb 33.7 05 PM 37.3 03 PM
Walworth Elkhorn ppb 40.8 05 PM 42.2 01 PM
Fond du Lac Fond Du Lac ppb 36 04 PM 38.6 01 PM
Ozaukee Grafton ppb 41.2 09 PM 48.2 09 PM
Brown Green Bay UW ppb 40.7 05 PM 43.4 02 PM
Ozaukee Harrington Beach Park ppb 46.7 11 PM 55 10 PM
Dodge Horicon Wildlife Area ppb 36.2 06 PM 39.7 05 PM
Jefferson Jefferson-Laatsch ppb 34 05 PM 36.5 04 PM
Kenosha Kenosha-Water Tower ppb 61.3 10 PM 71.6 09 PM
Kewaunee Kewaunee ppb 41.9 04 PM 43.3 03 PM
La Crosse La Crosse DOT ppb 37.2 05 PM 40.6 03 PM
Marathon Lake Dubay ppb 26.4 12 AM 15.4 03 AM
Dane Madison East ppb 35 05 PM 37.1 03 PM
Manitowoc Manitowoc ppb 36.6 04 PM 38.4 10 AM
Milwaukee Milwaukee-16th St. Health Center ppb 38.8 04 PM 50 11 PM
Milwaukee Milwaukee-UWM UPark ppb 44.3 04 PM 49.6 11 PM
Door Newport Park ppb 43.2 05 PM 46.8 03 PM
Forest Potawatomi ppb 30.8 03 PM 35.6 11 AM
Racine Racine-Payne & Dolan ppb 60 11 PM 71.2 10 PM
Sheboygan Sheboygan-Haven ppb 39.5 05 PM 41.8 03 PM
Sheboygan Sheboygan-Kohler Andrae ppb 48.6 11 PM 56.6 11 PM
Vilas Trout Lake ppb 32.1 04 PM 33.6 11 AM
Waukesha Waukesha-Cleveland Ave. ppb 39.1 05 PM 42.8 10 AM