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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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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 20.8 17.9 14.9 12.5 11.1 11.3 12.4 14 16.1 18.8 21.5 24.7 27.9 30.3 32.2 34.2 35.4 36.7 38.2 38.5 37.6 37.2 37.2 36.9
Brown Green Bay UW ppb 19.8 16.5 13.7 12.7 12.2 11.8 13.1 16.2 20.3 25.2 30.8 35 40 44.9 47.2 48.2 48.2 47.3 45.3 44 41.4 38.2 35.6 32.9
Columbia Columbus ppb 38 36.7 35.7 34.6 33.8 33.2 33.2 33.7 34.3 34.6 35.3 36.8 39.3 42.3 45.2 47.8 49.7 51.6 52.7 52.3 50.8 48.5 46.3 44
Dane Madison East ppb 27.7 24.6 21.9 20.4 20.4 21.7 23.7 25.3 26.7 27.6 29.1 30.8 32.9 35.1 38.1 41.3 44.5 47.8 50 51 50.7 49.7 48.5 47.6
Dodge Horicon Wildlife Area ppb 34.1 32 30.1 28.4 26.7 25.3 24.1 23.9 25 27 30 33.2 37.1 41.6 46.1 49.9 52.5 54.1 54.6 54.6 53.8 52.3 50.6 48.9
Door Newport Park ppb 29.6 27.4 24.7 22.3 19.5 20.4 22.8 25.2 27.5 29.2 31.8 34.3 38 40 40.5 41.4 43.7 46.4 48.6 50 50.5 51.7 52 50
Eau Claire Eau Claire DOT Sign Shop ppb 23.8 17.2 11.1 6 2.6 1.6 2 2.5 5.2 9.3 14.3 19.7 25.6 31.5 36.5 40.7 43.2 44.5 45.1 43.8 40.9 36.8 32.4 28
Fond du Lac Fond Du Lac ppb 35.4 34.1 32.7 31.1 29.6 28.5 27.4 28 28.7 29.6 31.5 34.8 38.4 42.2 45.9 48.2 49.7 50.4 50.5 50.2 49.3 48.2 47.1 45.5
Forest Potawatomi ppb 29.1 27.4 26.7 26 26.2 26.7 27.8 28.7 29.8 31.2 32.1 33.5 34.2 34.9 35.7 36.5 37 37.3 37 36.6 35.7 34.8 34.1 33.2
Jefferson Jefferson-Laatsch ppb 30.7 28.4 26 25.2 26.1 26.6 27.1 28.5 29.2 30.4 32.7 33.9 36 38.2 40.9 43.1 45.9 48.5 50.3 51.3 51.6 51.5 50.2 48.1
Kenosha Chiwaukee Prairie ppb 41.1 37.5 34.1 32 30.2 27.9 26.9 28 30.1 33.2 36.4 38.8 40.8 44.3 47.3 49.9 52.1 52.8 53.1 52.9 51.7 50.2 48.6 46.7
Kenosha Kenosha-Water Tower ppb 34.6 31.1 27.2 23.4 20.2 17.9 17.5 19.6 22.2 24.4 28.2 32.8 37 41 44.1 46.4 48.3 49.8 50.1 50.2 50.1 49.1 48.1 46.3
Kewaunee Kewaunee ppb 35.2 31.4 27.3 24 21.8 20.4 17.8 18.5 20.9 23.5 27.1 30.8 34.3 38 43 46.9 49.6 52.1 53.7 54.4 53.6 51 47.4 43.3
La Crosse La Crosse DOT ppb 38.6 34.3 30.1 27.4 25.3 23.6 22 20.7 20.6 20.9 21.9 24.1 27.2 31.2 36.2 40.8 44.5 47.8 50.9 52.4 52.2 49.8 47.2 44.5
Manitowoc Manitowoc ppb 29.2 23.7 18 12.9 9.8 8.5 8.2 10.1 12.9 17 21.8 27.2 33 38.5 43.3 47 50.5 53 55.1 56.1 55.1 52.4 49.8 47.4
Marathon Lake Dubay ppb 44.4 41.2 38.1 34.6 30.3 25.6 22 19.6 19.7 21.6 23.9 26.2 29.6 33.7 36.7 39 39.2 39.2 38.6 38 37.2 36.3 36.6 36.2
Milwaukee Bayside ppb 26.8 23.8 21 19.3 20 21.4 22.5 23.4 25.8 29.3 33.9 36.6 40.7 44.9 49 52.2 53.4 53.3 52.4 51.2 50.1 49.2 47.8 46.6
Milwaukee Milwaukee-16th St. Health Center ppb 24.8 23 21.2 20.5 21.3 22.8 23.5 24.7 26.5 29.1 32.6 36.1 39.3 42.8 46.3 48.8 50.3 50.1 49.5 48.5 47.4 46.1 44.9 43.5
Milwaukee Milwaukee-UWM UPark ppb 24 19.8 16.1 13.2 12.1 14.2 16.8 19.5 23 27.5 32.8 38.4 43.6 47.3 50.3 52.6 53.4 52.9 51.8 50.7 49.2 48 46.8 45.3
Outagamie Appleton ppb 30.9 29.1 26.5 23.9 22 21.5 21 21.7 23.3 25.5 29.1 32.7 36.9 40.1 42.6 43.9 44.7 44.9 43.9 42.9 41.2 39.3 36.9 34.1
Ozaukee Grafton ppb 31.5 30.3 29.6 29.2 28.2 26.8 26.2 26.9 28 29.8 32.6 36.4 41.1 45.6 49.3 51.2 52.9 53.7 53.4 52.9 52.2 51.6 51.1 50.8
Ozaukee Harrington Beach Park ppb 32.3 31 29.8 29.7 30.3 29.8 29.7 29.9 31.2 33.3 36.5 39.1 41.3 44.7 47.5 49.6 51.1 51.7 51.7 51.2 50.1 49.2 48.6 48.7
Racine Racine-Payne & Dolan ppb 38.4 35.2 32.5 30.1 28.1 26.9 26.3 26.9 28.5 30.4 33.4 36.7 39.8 42.9 46.2 49.1 51.1 52.4 52.2 51.7 51.8 51.1 49.9 48.3
Rock Beloit-Converse ppb 20.9 16.4 12.2 9.8 8.6 8.3 9.5 12.6 16.1 19.8 23.3 26.8 30.6 35.3 38.9 40.8 42.5 44.8 47.3 49.7 50.7 49.9 48.3 46.3
Sauk Devils Lake ppb 29 26.3 24.3 24.9 27.7 29.5 30.4 32.1 33.8 35.1 37.1 39.4 40.9 42.9 45.4 47.8 49.9 51.9 52.8 53.1 52.3 51.7 50.4 49.3
Sheboygan Sheboygan-Haven ppb 35.1 34 32.8 31.4 30.1 28.6 27.9 28.1 29.6 31.5 34.6 38 41.5 45.1 48.2 50.4 51.4 52.1 51.7 50.8 50.3 50 49.6 48.6
Sheboygan Sheboygan-Kohler Andrae ppb 30.7 29.1 27.9 25.5 24 24.7 25.3 25.5 26 27.2 28.8 30.8 33 36.6 40.3 43.7 47.1 49.7 51.5 52.9 53.8 52.5 50.6 48.9
Vilas Trout Lake ppb 26 22.5 18.8 15.5 12.4 9.9 7.9 8.3 10.7 13.9 14.8 19.3 24.1 29.2 34.1 36.6 37.1 36.8 35.8 34.2 31.4 29.1 26.6 24.5
Walworth Elkhorn ppb 36.7 34.9 33.8 32.7 31.6 30.6 30.3 30.4 31.1 32.6 34.4 36.9 39.6 42.9 45.3 47.8 49.8 50.8 50.9 50.7 50.4 49.2 47.7 45.3
Waukesha Waukesha-Cleveland Ave. ppb 22.9 18.6 14.5 11.1 9.8 10.2 11.3 12.6 15.9 21.1 26.6 32.6 38.1 42.9 46.6 49.9 52.3 52.2 51.9 51.6 51 49.8 47.8 45.6