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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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Thursday, 
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 40.4 39 37.2 34.6 31.3 29.9 29.7 30.4 31.2 31 31.5 33.1 35.5 37 38.5 40 41.6 43.1 43.8 42.8 40.2 36.2 31 25.6
Brown Green Bay UW ppb 40.7 40.3 40 39.8 39.5 39.1 39.1 39.6 40.5 41.7 42.7 44 45.6 47.2 48.8 50.3 51.6 52.3 52.1 50.9 49.9 48.4 46.7 44.6
Columbia Columbus ppb 31.5 30.6 30.4 31.2 31.8 32.5 33.5 34.4 35.2 36.1 36.9 37.4 38.4 39.2 39.8 40.7 41.4 42.2 42.8 42.9 42.5 42.1 41.7 41.2
Dane Madison East ppb 28.4 27.4 26.8 26.7 26.5 27.1 27.7 28.2 28.8 29.5 30.3 31 32.1 32.8 33.8 34.9 36 36.8 37.5 38.2 38.9 39.1 38.7 38.3
Dodge Horicon Wildlife Area ppb 32.6 33.5 34.8 36 37.2 38.1 39.1 39.9 40.7 41.2 41.8 42.2 42.8 43.7 44.5 45.3 46 46.4 46.5 46.6 46.3 45.7 45.3 44.7
Door Newport Park ppb 42.8 41.3 39.7 38.4 37.4 36.4 35 34.2 34.4 35 36.2 37.6 39.2 40.6 42.5 43.9 44.9 45.6 46 45.7 44.9 44.5 44.1 43.5
Eau Claire Eau Claire DOT Sign Shop ppb 41.9 39.6 37.4 35.7 33.9 31.9 30 28.3 27.2 26.6 26.5 26.6 27.1 28.1 29.3 30.6 31.4 31.6 31.5 31.2 30.7 29.7 28.1 25.8
Fond du Lac Fond Du Lac ppb 35.2 35.8 36.4 37 37.6 38.2 38.6 39 39.9 40.5 41.1 41.6 42.3 42.9 43.4 44.1 44.6 45.3 45.6 45.3 44.7 44.2 43.6 43.2
Forest Potawatomi ppb 44.5 43.3 41.8 40.4 39.3 38.5 38 37.8 38.1 38.8 39.9 40.9 41.8 42.9 43.8 44.8 45.8 46.5 47 47.3 47.3 47.1 47 46.8
Jefferson Jefferson-Laatsch ppb 30 29.8 30.3 30.9 31.8 32.5 33.3 34 34.6 35 35.1 35.2 35.4 35.9 36.7 37.5 38.4 39.3 40.3 40.8 40.7 40.4 39.9 38.9
Kenosha Chiwaukee Prairie ppb 39.2 39.4 39.4 39 38.7 38.5 38.5 38.4 38.6 38.8 39.2 39.8 40.2 40.6 41.1 41.8 42.8 43.6 44.2 44.8 45.6 46.6 47.7 48.6
Kenosha Kenosha-Water Tower ppb 37.7 37.8 38.2 38.2 38.1 38 38 38.2 38.6 38.8 39.3 40 40.4 40.8 41.8 42.8 43.7 44.6 45 44.9 45.2 45.8 46.2 46.2
Kewaunee Kewaunee ppb 44 44.3 44.4 44.4 44.2 44.1 44.5 44.2 43.8 43.6 43.8 44.2 45.1 46.2 47.4 48.6 49.8 50.7 51.2 51.3 51 49.8 48.5 46.7
La Crosse La Crosse DOT ppb 38.4 36.4 34.8 33.6 32.3 30.9 29.3 28.1 27.2 26.6 26 25.8 25.8 26.2 26.8 27.2 27.6 28.1 28.4 28.6 28.9 29.2 29.6 29.9
Manitowoc Manitowoc ppb 42 41.7 41 40.5 40 39.5 39 38.9 38.7 39.1 39.7 40.7 42.1 43.6 45 46.3 47.4 48.1 48.4 48.4 47.6 45.9 43.3 40.7
Marathon Lake Dubay ppb 36.3 34.5 33.5 32.7 32.2 32.3 32.9 34 35.5 36.9 38.1 39.3 40.7 41.9 43.2 44.3 45.4 46.2 46.7 46.6 46.1 45.6 45 44.2
Milwaukee Bayside ppb 40.2 40.2 40.2 40.3 40.4 39.8 39.5 39.5 39.8 40.3 40.8 41.4 41.8 42.7 43.5 44.3 45.1 45.6 46.1 46.9 47.6 48 47.8 46.1
Milwaukee Milwaukee-16th St. Health Center ppb 30 30.2 30.7 31.4 31.3 31 30.5 30.2 30.5 30.8 31.3 31.7 32.5 33.3 34.3 35.2 35.8 36.1 35.9 35.9 36.1 36.3 36 34.6
Milwaukee Milwaukee-UWM UPark ppb 36.9 36.8 37 37.2 37 36.5 36 35.9 36.2 36.7 37.4 38 38.8 39.9 41.1 42.1 42.9 43.7 44.3 45.1 45.9 46.7 46.7 45.9
Outagamie Appleton ppb 37.2 37.5 37.8 38.6 39.1 39.6 40.3 41.2 41.9 42.7 43.6 44.6 45.8 47.4 48.8 50.1 51 51.7 51.7 50.8 48.6 46.9 45.1 42.2
Ozaukee Grafton ppb 39.6 39.6 39.5 39.5 39.1 38.8 38.8 38.9 39.2 39.7 40.2 41 42 43.1 44.1 45 46 46.6 47.1 47.3 47.2 46.2 45.3 44.7
Ozaukee Harrington Beach Park ppb 43 42.7 42.2 41.8 41.3 41.2 41.1 41.1 41.3 41.6 41.9 42.7 43.4 44 44.8 45.6 46.5 47.3 48.1 47.8 47 46.1 45.3 44.4
Racine Racine-Payne & Dolan ppb 39.7 39.6 39.5 39 38.1 37.5 37 36.9 37 37.3 37.7 38.3 39.2 40.2 41.3 42.3 43.1 43.8 44.5 45 45.7 46.4 47 47.2
Rock Beloit-Converse ppb 27 26.1 25.7 25.7 26.1 26.8 27.6 28.7 29.9 31.1 32.2 33.2 34.2 35.2 36 36.6 37.1 37.6 38 38.5 39.1 39.6 39.7 39.6
Sauk Devils Lake ppb 31.4 29.9 28.7 27.9 27.2 26.9 27.3 28.1 29.2 30.1 31.1 32.2 33.4 34.7 35.9 36.7 37.4 37.9 38.4 38.7 39.3 39.6 39.4 39.3
Sheboygan Sheboygan-Haven ppb 41.7 41.7 41.6 41.7 41.6 41.9 41.8 42 42 42 42.2 42.7 43.6 44.4 45.5 46.4 47.5 48.4 48.9 49 48.4 47.3 45.8 44.2
Sheboygan Sheboygan-Kohler Andrae ppb 44.9 44.4 44.1 43.8 43.8 43.6 43.4 43.3 43.2 43.4 43.7 44.2 44.5 44.9 45.6 46.3 47.2 47.9 48.4 48.9 49 49.2 48.9 47.2
Vilas Trout Lake ppb 46.2 45.5 44.4 43 41.5 40.1 38.8 37.7 36.9 36.4 36.5 37.2 38.5 39.9 41.4 42.9 44.1 44.7 44.6 44.6 43.8 43 41.4 39.3
Walworth Elkhorn ppb 31.6 31.6 31.7 31.9 32.7 33.6 34.4 35.2 35.5 35.7 36 36.4 36.3 36.5 36.9 37.3 38.1 39.2 40.1 40.5 40.8 40.4 40.4 40
Waukesha Waukesha-Cleveland Ave. ppb 33 33.2 33.5 34.3 34.8 35.3 35.6 35.3 35.4 35.6 36.1 36.5 37 37.5 38.2 39.6 40.7 41.3 41.7 41.7 41.8 42.1 41.3 39.1