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Noise monitoring program
Active Air Quality Notification
  • An air quality ADVISORY for Unhealthy PM2.5 levels is in effect from 8/4/2025 12:00 to 8/5/2025 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,Juneau,Jefferson,Kenosha,Kewaunee,Lafayette,La Crosse,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 .

8-HR Ozone Summary

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Friday, 
County Site Units 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Ashland Bad River Tribal School ppb 8.9 6.7 4.5 2.6 2.1 1.6 1.5 1.5 3.7 6.9 10.1 13.3 16.4 19.7 23 23.5 24.7 25.1 25.6 26 26.1 24.6 22.1 19.5
Brown Green Bay UW ppb 15.7 15.7 15.4 14.9 14.7 14.3 14.6 14.6 15 15.6 16.4 17.8 19.2 21.2 22.3 23.3 24 24.2 23.5 22.1 20.7 19.7 18.6 17.7
Columbia Columbus ppb 19.2 17.2 15.9 15.1 14.6 14.2 14.2 14.7 15.8 17.1 18.6 20.2 21.9 23.9 26.1 28 29.3 30.4 30.8 30.6 29.7 28.1 26.1 24.3
Dane Madison East ppb 21.7 19.8 17.8 16.4 15.7 15.2 14.8 14.6 14.8 15.5 16.7 18.3 20.2 22.3 24.5 26.6 28.5 29.7 30.3 30 28.9 27 24.8 22.5
Dodge Horicon Wildlife Area ppb 20.2 18.8 17.5 16.6 15.9 15.5 14.9 14.9 15.7 17 18.4 20 21.7 23.5 25.6 27.4 28.6 29.1 29.1 28.5 27.7 26.4 25.1 22.8
Door Newport Park ppb 21.8 21.8 21 20 18.9 17.7 16.8 16.4 16.3 16.6 17.8 18.8 20 21.2 21.9 22.1 22.4 22.3 21.7 20.5 19.4 18.5 18.5 18.7
Eau Claire Eau Claire DOT Sign Shop ppb 17.2 15.4 13.7 12.3 11.3 9.7 8.2 7.7 8.2 9.5 11.3 13.3 15.5 18.5 21.7 24.4 26.9 28.4 28.7 27.3 24.8 22.2 19 15.7
Fond du Lac Fond Du Lac ppb 15.4 14.6 14 13.4 13.7 13.3 12.9 13.2 14.3 15.2 16.5 18.3 19.8 21.8 24.2 25.9 26.6 26.6 25.7 24.6 23.3 21.8 20.2 18.9
Forest Potawatomi ppb 12.7 12.4 12.4 12.8 13.6 14.3 14.7 14.9 15.3 16.3 17.6 19 20.5 22.2 24.2 26 27.4 28.2 28.4 27.7 26.3 24.9 23.3 21.6
Jefferson Jefferson-Laatsch ppb 20.6 18.1 16.4 15.2 14.3 13.8 13.8 14.4 15.4 17 18.6 20.4 22.4 24.4 26.5 28.5 29.9 30.6 30.5 29.7 28.5 26.8 24.3 21.3
Kenosha Chiwaukee Prairie ppb 28.6 28.1 27.8 27.4 27 26.7 26.4 26.2 26.1 26.2 26.4 26.6 26.9 27.2 27.6 27.8 28 28.2 28.2 28.2 28 28 27.9 28
Kenosha Kenosha-Water Tower ppb 24 22.4 20.7 20 19.8 19.5 19.4 20 21.6 22.8 24.6 25.5 26 26.7 27.2 27.3 27.7 27.6 27.4 26.8 25.9 24.2 22.3 20.6
Kewaunee Kewaunee ppb 19.6 19.3 18.9 18.4 17.9 18.3 18.8 19.2 19.4 19.6 19.9 20.3 21 21.9 22.8 23.3 23.8 23.9 24 23.7 22.9 22 21.5 21.6
La Crosse La Crosse DOT ppb 24.2 22.7 21.8 21.6 21.3 20.4 19.3 18.7 18.6 19.2 20 20.9 22.3 24.2 26.2 28.1 29.6 30.6 31.1 30.3 29.6 29.4 28.8 28.2
Manitowoc Manitowoc ppb 11 9.6 8.7 9.2 9.6 10.2 11.1 11.8 12.8 15.3 17.1 18.1 19.9 21.9 23.5 23.6 23.7 23.9 23.4 21.9 20.2 18.4 16.2 14.2
Marathon Lake Dubay ppb 16.5 15.1 14 13.2 12.9 12.7 12.5 12.6 13.2 14.7 16.4 18.1 20.1 22.3 24.8 26.9 28.5 29.3 29.1 28.9 28.3 27.3 26.1 24.9
Milwaukee Bayside ppb 26.8 26.9 25.5 23.9 22.2 21 20.2 19.5 19.2 19.1 20.3 21.9 23.4 24.4 25.2 25.7 25.6 25.5 25.4 25.4 25.4 24.5 23.5 23.5
Milwaukee Milwaukee-16th St. Health Center ppb 25 24.9 23.3 21.4 19.4 17 14.7 13.6 12.9 12.9 14.6 16.8 18.9 21.3 23.6 24.7 24.9 24.7 24.2 23.5 23 21.6 19.5 17.4
Outagamie Appleton ppb 13.8 12.6 12 11.8 11.4 11.7 12.5 13.4 14.7 15.9 17 18.2 19.7 21.3 23.5 25.5 26.9 27.7 27.7 26.8 25.2 22.8 20.3 17.9
Ozaukee Grafton ppb 19.7 18.2 16.8 15.2 13.5 12 12.5 13.7 15.5 17 18.5 20.1 21.9 24.3 25.3 26 25.9 25.7 25.4 24.8 24.3 22.9 21.4 20
Ozaukee Harrington Beach Park ppb 21.5 19.8 18.1 16.6 15.1 13.5 12.8 12.8 14.3 16 17.6 19 20.6 22.2 23.4 24 23.9 23.8 23.6 22.9 21.9 20.8 19.6 18.5
Racine Racine-Payne & Dolan ppb 27 26.8 26.7 26.3 26 25.8 25.3 25.1 25 25.1 25.2 25.4 25.8 26.2 26.5 26.8 26.9 26.8 26.6 26.4 26.2 26 26.1 26
Rock Beloit-Converse ppb 22.5 20.1 17.8 16 14.6 13.2 11.8 11.5 12.1 13.3 15.4 18.1 21.5 25.1 28.6 31.4 33.5 35.1 35.4 34.6 32.8 30.2 27.2 24.2
Sauk Devils Lake ppb 24.1 23.1 21.7 20.9 20.5 20.2 20.1 19.8 19.5 19.5 20.4 21.4 22.6 24 25.3 26.7 28.5 29.8 29.9 29.1 28.1 27.8 27 26
Sheboygan Sheboygan-Haven ppb 15.5 14 13 12 11 10.6 10.8 11.8 13.3 14.9 16.2 17.6 19 20.3 21.4 22.2 22.3 22.5 22.5 22 21.2 20.4 19.4 18
Sheboygan Sheboygan-Kohler Andrae ppb 23.7 21.8 20.2 18.7 17.2 15.8 14.9 15 16.4 18.4 19.8 21.2 22.7 24 24.9 24.8 24.6 24.6 24.8 24.9 24.9 25.1 25.3 25.5
Vilas Trout Lake ppb 10.9 9.8 8.8 8.6 8.8 8.5 8.7 9.6 11.2 13 15 16.6 18.3 20.3 22.1 22.9 23.7 23.8 23.1 21.9 20.2 18.8 17.4 16
Walworth Elkhorn ppb 20.2 18.7 18.1 17.7 17.5 17.1 16.5 16.2 16.9 18 18.1 20 21.7 24 26.5 28.7 30.2 30.9 30.2 28.8 27.4 25.7 23.7 21.7
Waukesha Waukesha-Cleveland Ave. ppb 18.8 16.7 14.8 13.8 12.8 12.1 11.5 11.7 12.8 14.7 16.9 18.6 20.4 22.4 24.4 26 26.5 26.6 26.1 25 23.8 22.4 20.8 19.1