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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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Wednesday, 
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 13.5 10.7 7.9 5.6 4.2 3.6 4.4 6 8.3 10.2 12.4 15 17.9 20.3 21.7 22.9 23.5 24.6 24.9 24.1 25.9 28.1 29.4 30.7
Brown Green Bay UW ppb 32.3 30.8 29.6 26.9 24.2 21.2 20.5 18.5 17.2 20.8 25.2 30.1 36.2 41.5 45.8 46.3 46.5 47 47 46.6 46 45.5 45.2 44.9
Columbia Columbus ppb 43.4 40.2 36.8 33.7 30.6 27.7 25.2 24 24 24.7 26.8 30 34.2 38.9 43.3 46.8 50.1 53.2 54.2 55.4 55.4 54.4 53.5 52.6
Dane Madison East ppb 44.2 41.4 38.3 34.5 29.8 25.8 23.8 23.3 24 25.5 27.5 31.6 37.4 44.3 50.2 54.3 56.7 58.9 60.6 60.9 60 58.5 56.7 54.7
Dodge Horicon Wildlife Area ppb 47.7 44.7 42.3 40.3 38 35.8 34.1 32.9 32.4 32.2 31.8 33.1 35.7 39.6 43.7 47.6 51.4 52.3 52.4 52.9 53 52.9 52.3 51.7
Door Newport Park ppb 26.5 22.8 20.7 18.8 17.2 16.9 17.8 19.2 21.3 22.6 23.5 25.2 26.7 28.3 29.6 30.8 31.9 32.5 32.6 32.7 32.7 32.3 32.2 32.7
Eau Claire Eau Claire DOT Sign Shop ppb 24.1 21.1 16.7 12.1 8.5 5.9 5.8 7.3 9.3 13 17.9 23.2 28.7 34.1 38.6 41.9 44.9 47.2 48.4 49.5 50.3 50.8 51.1 51.3
Fond du Lac Fond Du Lac ppb 42.6 40.9 39.4 38.1 36.3 34.7 33.7 33.1 33.3 33.8 35.1 36.8 38.9 41.6 44.5 47.1 49.4 51.1 51.9 51.9 51.7 51.3 50.8 50.3
Forest Potawatomi ppb 19.6 16.9 14.6 13.4 13.2 12.8 12.7 13.1 14.9 17 19.6 22.1 24.7 27.7 30.2 31.8 33 34.3 35.8 37.2 38.3 39.6 40.7 42.4
Jefferson Jefferson-Laatsch ppb 46.4 43.7 40.4 37.4 33.6 30.3 27.8 27 28.1 30 32.8 36.4 41.3 46.2 51.1 55 57.7 59.8 61 61.2 60.6 59.9 58.6 56.8
Kenosha Chiwaukee Prairie ppb 50.7 50.1 49.7 49.1 48.2 46.8 45.8 45.1 44.3 43.6 43.8 45.2 47.5 50.5 53.7 55.9 57.5 59.1 58.9 58.2 57.1 55.3 54 53.7
Kenosha Kenosha-Water Tower ppb 50.1 49.2 48.4 48.1 48.2 48 47.6 47.5 47.3 47.7 48.4 49.3 50.5 52.4 55.4 57.4 58.5 59 58.9 58.2 56.9 55.3 54.2 54.3
Kewaunee Kewaunee ppb 46.4 43.9 42.3 41.8 41 39.6 39.6 40 42.3 45 47.6 47.6 47.5 48.3 48 47.4 46.7 46.7 46 45.4 44.9 44.5 44.5 45.1
La Crosse La Crosse DOT ppb 30.1 24.8 20.8 18 17.5 16.8 16.2 16.8 18.4 21.1 23.6 27.4 30.2 33.5 37.6 41 44.3 47.5 50.1 51.6 53 53.8 53.9 53.4
Manitowoc Manitowoc ppb 40.4 41.4 42.9 43.1 39.7 37.7 35.9 34.7 33.5 32.8 33.9 37 42 46.3 49 50.9 53.1 54.3 54.2 53.2 51.7 50.3 49.1 48.5
Marathon Lake Dubay ppb 33.9 31 28.2 25.3 22.8 20.7 19.4 18.9 18.7 19.1 19.3 21.1 24.1 27.4 30.5 33.4 36.1 39 41.7 43.3 45 46 46.4 46.4
Milwaukee Bayside ppb 50.8 49.8 48.5 47.6 46.4 44.4 43.6 43.1 42.7 42.7 43.4 44 45.9 48.6 50.7 52.2 53.5 54.3 54.7 54.4 53.2 52.1 51.6 50.2
Milwaukee Milwaukee-16th St. Health Center ppb 47.7 46.5 45.6 45.1 44.2 43.4 43 42.6 42.3 42.4 42.5 43 44.2 45.8 47.3 48.6 49.6 50.1 50.3 49.8 49.1 47.9 46.7 45.6
Milwaukee Milwaukee-UWM UPark ppb 51.8 50.7 49.6 48.7 47.6 46.6 45.9 45.9 46.1 46.5 46.8 47.1 48.3 49.9 51.6 52.7 53.2 53.6 53.9 54.1 53.6 53.2 52.6 51.5
Outagamie Appleton ppb 35.6 32.8 31.8 29.7 27.9 25.7 24.6 24.4 25.3 27.8 30 32.7 36 39.5 43.2 46.2 49.2 51.4 52.5 53 52.8 51.3 49.6 49.6
Ozaukee Grafton ppb 49.4 48.2 47.1 45.6 43.1 40.7 39.9 38.1 36.7 36.6 37 38.1 40.3 43 45.5 48.1 50.2 51.7 52.5 52.8 52.4 51.7 50.9 49.4
Ozaukee Harrington Beach Park ppb 50.3 49.3 47.6 45.8 42.8 40.6 38.7 36.6 35 35.2 36.7 38.1 39.9 42.5 45.5 48.2 50.3 51.2 51.6 51.8 51.5 51 50.3 49.6
Racine Racine-Payne & Dolan ppb 53.1 52.3 51.8 51.5 51.4 51.7 51.8 51.4 51.3 51.3 51.5 51.9 52.5 53.6 54.8 56 56.6 56.8 56.6 56 55.5 54.7 53.8 53.8
Rock Beloit-Converse ppb 45.8 43.7 41.9 40.2 38.1 36.5 35.9 36 37 38.6 41.4 45 49.4 53.7 57.4 60.8 63.9 65.4 65.8 65.2 63.7 61.4 58.5 56.1
Sauk Devils Lake ppb 42 38.9 36.1 31.9 28.1 25 23.1 21.8 20.4 19.6 19.8 22.1 26.1 31.3 35.2 39.4 44.6 48.4 51.2 52.8 53.9 54.3 54.4 53.5
Sheboygan Sheboygan-Haven ppb 46 46.3 45.9 45 43.6 41.8 41.2 40.6 40.4 40.4 41.6 43.3 45.9 48.8 50.6 52.4 53.6 53.9 53.7 53.3 52.5 51.2 50 49.1
Sheboygan Sheboygan-Kohler Andrae ppb 52.9 53.4 51.5 46.6 42.1 39.4 39.6 39.6 39.2 38.4 40.1 42.8 46.4 49.9 50.7 51 51.7 53 53.5 53.6 53.2 52.9 52.4 51.8
Vilas Trout Lake ppb 9.3 6.8 5 3 2.2 1.7 1.8 3.5 5.8 8.9 12.7 16.5 20.7 24.7 28.3 30.3 32.2 33.4 33.7 34.2 34.8 35.8 37.6 39.6
Walworth Elkhorn ppb 44.4 41.4 37.9 35.1 33.4 31.6 31.2 32.1 33.9 36.5 40.4 45.1 49.2 54.1 57.3 60.3 62.7 64.2 64.9 64.1 62.2 59.7 58.4 56.1
Waukesha Waukesha-Cleveland Ave. ppb 48.3 46.4 44.4 42.6 41 39.8 39 39.5 40.2 41.4 43.3 46.1 49.4 53 56.2 58.6 60.3 61.1 61 59.5 57 54.5 52.3 50.9