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Noise monitoring program
Active Air Quality Notification
  • An air quality ADVISORY for Unhealthy PM2.5 levels is in effect from 8/1/2025 12:00 to 8/2/2025 12:00 for these counties: Adams,Ashland,Barron,Bayfield,Brown,Buffalo,Burnett,Calumet,Chippewa,Clark,Columbia,Crawford,Dane,Dodge,Door,Douglas,Dunn,Eau Claire,Florence,Fond du Lac,Forest,Grant,Green,Green Lake,Iowa,Iron,Jackson,Jefferson,Juneau,Kenosha,Kewaunee,La Crosse,Lafayette,Langlade,Lincoln,Manitowoc,Marathon,Marinette,Marquette,Menominee,Milwaukee,Monroe,Oconto,Oneida,Outagamie,Ozaukee,Pepin,Pierce,Polk,Portage,Price,Racine,Richland,Rock,Rusk,Sauk,Sawyer,Shawano,Sheboygan,St. Croix,Taylor,Trempealeau,Vernon,Vilas,Walworth,Washburn,Washington,Waukesha,Waupaca,Waushara,Winnebago,Wood .

Highest Ozone

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Sunday, 
County Site Units 8-Hour Hour of Day 1-Hour Hour of Day
Outagamie Appleton ppb 40.7 05 PM 45.2 03 PM
Ashland Bad River Tribal School ppb 36.3 05 PM 39.8 05 PM
Milwaukee Bayside ppb 40.7 06 PM 42.7 03 PM
Rock Beloit-Converse ppb 48.1 06 PM 52.8 04 PM
Kenosha Chiwaukee Prairie ppb 43.6 10 PM 44.8 06 PM
Columbia Columbus ppb 43.3 07 PM 47 04 PM
Sauk Devils Lake ppb 43.2 05 PM 49 05 PM
Eau Claire Eau Claire DOT Sign Shop ppb 40 06 PM 43.5 04 PM
Walworth Elkhorn ppb 44.9 05 PM 51.7 04 PM
Fond du Lac Fond Du Lac ppb 42.8 06 PM 46.6 04 PM
Ozaukee Grafton ppb 40.5 06 PM 41.9 03 PM
Brown Green Bay UW ppb 42.2 05 PM 44.5 03 PM
Ozaukee Harrington Beach Park ppb 42 05 PM 44 02 PM
Dodge Horicon Wildlife Area ppb 42.9 06 PM 45.7 04 PM
Jefferson Jefferson-Laatsch ppb 41.6 06 PM 45.8 04 PM
Kenosha Kenosha-Water Tower ppb 41.4 06 PM 42.8 05 PM
Kewaunee Kewaunee ppb 43.8 06 PM 46.3 05 PM
La Crosse La Crosse DOT ppb 39.6 05 PM 41.7 02 PM
Marathon Lake Dubay ppb
Dane Madison East ppb 46.6 06 PM 51.6 04 PM
Manitowoc Manitowoc ppb 40.5 05 PM 42.7 04 PM
Milwaukee Milwaukee-16th St. Health Center ppb 38.4 05 PM 40.5 03 PM
Milwaukee Milwaukee-UWM UPark ppb 41.1 06 PM 42.8 04 PM
Door Newport Park ppb 45.9 12 AM 47.6 01 PM
Forest Potawatomi ppb 46.9 04 PM 49.6 08 PM
Racine Racine-Payne & Dolan ppb 41 05 PM 42.8 04 PM
Sheboygan Sheboygan-Haven ppb 40.4 06 PM 42.1 04 PM
Sheboygan Sheboygan-Kohler Andrae ppb 41.4 06 PM 43 05 PM
Vilas Trout Lake ppb 44.5 05 PM 46.2 11 AM
Waukesha Waukesha-Cleveland Ave. ppb 41.9 05 PM 45.7 01 PM