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Noise monitoring program
Active Air Quality Notification
  • An air quality ADVISORY for Unhealthy for Sensitive Groups PM2.5 levels is in effect from 8/5/2025 12:00 to 8/6/2025 12:00 for these counties: Ashland,Bayfield,Brown,Calumet,Dodge,Door,Douglas,Florence,Fond du Lac,Forest,Green Lake,Iron,Kenosha,Kewaunee,Langlade,Lincoln,Manitowoc,Marathon,Marinette,Marquette,Menominee,Milwaukee,Oconto,Oneida,Outagamie,Ozaukee,Portage,Racine,Shawano,Sheboygan,Vilas,Washington,Waukesha,Waupaca,Waushara,Winnebago .

8-HR Ozone Summary

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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 10.4 8.1 6.3 5.7 6.1 6.6 7.1 8 9.5 11.4 13.5 15.6 17.8 20 22 23.6 24.7 25.2 24.5 22.7 20.8 19.6 18.7 17.8
Brown Green Bay UW ppb 17.7 17.3 17 17.2 16.7 15.5 13.6 12.7 11.6 10.5 30.9 30.2 29.4 28.6 27.6 26.4 25 23
Columbia Columbus ppb 18.1 16.4 15.4 14.8 14.2 13.6 12.8 12.8 14 15.8 17.5 19.3 21.5 24 26.6 28.7 29.9 30.5 30.5 30.1 29.7 29.2 28.3 26.8
Dane Madison East ppb 14.7 12.6 10.6 8.8 7.8 7 6.5 6.4 7.4 9.5 12.4 15.5 19.2 23.6 27.9 32.1 35.4 37 37.4 37.1 35.9 33.9 31.3 28.7
Dodge Horicon Wildlife Area ppb 18.4 16.8 15.7 14.9 13.9 12.7 12 11.9 13.1 14.9 16.7 18.8 21.5 24.7 27.7 30 31.8 33 33.9 33.7 32.9 31.9 30.3 28.2
Door Newport Park ppb 22.8 21.2 20.6 19.1 17.3 16.3 15.5 15.7 17 18.4 19.6 21.9 24.4 26.4 28.1 29 29.3 29.4 29 28.9 28.7 28.7 28.9 29.1
Eau Claire Eau Claire DOT Sign Shop ppb 7.7 4.8 2.7 1.5 0.9 0.6 0.7 1.7 3.7 6.7 10.3 13.8 17.3 20.9 24.6 27.5 29.7 30.6 30.4 30.2 30.6 30.5 29.8 28.7
Fond du Lac Fond Du Lac ppb 19 18.4 17.8 17.6 17.5 16.8 16.7 16.7 17.1 18.2 19.9 21.4 22.7 24.8 26.9 29.1 30.5 31.4 31 30.4 29.4 28.1 26.5 24.2
Forest Potawatomi ppb 17.4 16 14.8 14 13.6 12.9 12.4 12.7 13 13.9 15.9 17.6 19.4 21.2 22.8 24 25.2 26.1 25.8 25.2 24.6 24.1 23.5 22.7
Jefferson Jefferson-Laatsch ppb 15.4 13.4 12.2 11.2 9.8 8.9 9 9.6 10.4 12.1 14.3 17 20.2 23.8 27 29.6 31.7 33 33.1 31.2 28.8 27.2 25.3 23.3
Kenosha Chiwaukee Prairie ppb 30.7 30 29.9 29.5 27.3 25.1 22.9 21.5 21.2 21.3 21.4 22.1 24.6 27.3 30.1 32.1 32.9 33.1 32.9 32.4 30.2 27.2 23.9 20.7
Kenosha Kenosha-Water Tower ppb 24.1 21.2 18.2 16 13.7 11.6 10 10.3 11.6 13.8 16.9 19.7 22.5 25.6 28.3 30.5 31.4 31.6 31.2 30.2 28.8 26.2 23 20.1
Kewaunee Kewaunee ppb 22.9 21.8 20.4 19.8 19.3 18.8 18.7 18.7 18.6 19.7 21.1 22.8 24.6 26.2 27.6 28.7 29.2 29.8 30 29.7 28.8 28.1 27.5 26.8
La Crosse La Crosse DOT ppb 14.2 11.7 9.1 7.6 6.4 5.3 4.3 4.2 5 6.8 10 13.6 17.5 21.4 25.4 28.9 31.7 33.7 34.6 34.9 34.8 34.4 33.5 32.2
Manitowoc Manitowoc ppb 18.5 17.4 15.9 15.1 14.6 13.9 13.7 14.3 13.9 13.6 29.1 29.1 28.7 27.8 26 24.1 21.7 19.5
Marathon Lake Dubay ppb 16 14.4 13.7 12.7 11.4 10.3 9.6 9.3 10 12 13.7 15.9 18.3 20.7 23.1 25.1 26.4 27 26.8 26.4 25.6 24.7 23.6 22.6
Milwaukee Bayside ppb 24.3 23.2 22 21.2 20.6 19.4 18.9 18.9 19.7 20.9 22.2 23.4 24.8 26.6 28 28.4 28.5 28.2 27.8 26.9 25.4 23.4 20.7 17.8
Milwaukee Milwaukee-16th St. Health Center ppb 19.5 18.1 16.8 16.2 15.1 14.1 13.5 13.7 14.8 16.5 18.6 20 21.8 23.9 25.6 26.8 27.4 27.6 27.3 26.6 25.4 23.2 20.5 18.8
Outagamie Appleton ppb 15.8 14.3 13.1 12 11.1 10.7 10.6 10.7 12 13.6 15.7 17.9 20.5 24.1 28.5 31.4 33.4 34.6 35.3 34.5 33.3 31 27.9 25.8
Ozaukee Grafton ppb 21.3 20.8 20 19.3 18.4 17.5 16.8 17.2 17.9 18.7 20.1 21.6 23.6 25.7 27.4 28.3 28.8 28.8 28.6 28.4 26.1 23.2 20.9 18.8
Ozaukee Harrington Beach Park ppb 19.5 18.7 18 17.4 16.8 16.3 16.2 16.6 17.2 18 19.1 20.4 21.9 23.5 24.9 25.8 26.4 26.8 27 27.2 27 26.3 25.3 24
Racine Racine-Payne & Dolan ppb 28.9 28.5 27.9 26.9 25.6 24 21.5 19.4 19.2 19.4 20 21.4 23 25 27.9 30.3 31 31.1 30.8 30.3 29.2 27.2 25.6 23.8
Rock Beloit-Converse ppb 23 20.5 17.9 15.8 14.4 13.2 12.5 12.1 12.9 14.9 17.8 21.1 24.2 27.5 30.5 33.3 35.2 36.5 35.9 33.2 29.8 25.5 21.9 19.3
Sauk Devils Lake ppb 8.1 6.6 5.7 4.7 3.6 2.7 2.7 3.5 5.5 8.4 11.2 14.5 17.7 21.2 24.1 26.9 28.1 28.4 27.9 27.5 26.8 25.7 25 23.6
Sheboygan Sheboygan-Haven ppb 19.8 19.2 18.3 17.5 16.9 16.4 16.2 16.5 17 17.9 19.2 20.6 22.1 23.7 25 25.8 26.2 26.3 26.1 25.2 24.1 23 21.7 20.1
Sheboygan Sheboygan-Kohler Andrae ppb 23.6 22.8 22.2 21.2 19.9 18.5 17.5 17.3 17.9 19.3 20.5 21.9 23.5 25.3 27.4 28.6 29.3 29.1 29.2 28.5 26.8 25.1 22.7 20.2
Vilas Trout Lake ppb 18 16.1 14.4 12.7 11 9.4 7.7 7.4 8 9.7 12 14.7 17.4 20.2 23.1 25.2 26.4 26.6 26.2 25 23.4 22 20.9 19.9
Walworth Elkhorn ppb 19.2 16.9 14.9 13.1 11.3 10.1 9.8 10.1 11.2 13 15.7 18.8 22.3 26 29 31.5 32.9 34.2 34.2 33.1 31.6 30.1 28.2 26.5
Waukesha Waukesha-Cleveland Ave. ppb 19.5 18.5 17.3 16.6 15.6 14.3 13.3 13.3 14.1 15.4 17.3 19.1 21.5 24.5 27.5 29.4 30.7 31.2 31.2 29.9 27.8 25.9 23.3 20