-
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

Filter by County:
Filter by Site:
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 14.5 10.4 6.7 3.2 1.8 1.3 1.5 2.1 3.9 6.5 9.2 12.3 15.6 19.1 21.8 24.1 25.4 25.6 25.6 24.1 21.4 18.1 15.4 13
Brown Green Bay UW ppb 20.9 18.7 17 16 15.8 15.8 16 16.4 16.7 17 17.5 17.6 18 18.6 19.3 20.1 20.8 21.3 21 20.1 19.4 19 18.6 18
Columbia Columbus ppb 22.2 19.9 18.2 17 16.7 17.5 18.2 19.1 20.6 22.3 23 24 24.6 23.9 24.2 24.6 24.5 23.9 24.1 23.6 23.1 22.4 21.2 19.7
Dane Madison East ppb 24.8 22.3 20.9 20.3 19.5 18.4 17.5 17.4 17.8 18.2 19 19.2 19.6 20.8 21.7 23 23.7 24 23.4 22.9 21.8 20 18.6 16.9
Dodge Horicon Wildlife Area ppb 23.4 21.3 20.2 19.6 18.8 18.1 17.8 17.3 16.7 16.9 17.5 18.5 19.8 21.2 23 24.7 26.5 27 26.7 26 24.9 23.5 21.6 20.2
Door Newport Park ppb 19.6 19.8 20.1 20.5 20.6 20.4 20 19.6 19.4 19.5 20 20.4 21.2 22.5 23.8 24.8 25.8 26.4 26.3 26.2 26.2 25.8 25.3 24.4
Eau Claire Eau Claire DOT Sign Shop ppb 8.8 8.5 9.1 9.9 9.9 9.7 9.4 9.5 9.7 10.8 11 11.3 23.1 21.3 19.3 16.7 13.7 10.8
Fond du Lac Fond Du Lac ppb 24.4 23.6 22.7 21.7 20.2 18.7 17 15.4 14.6 14.7 16.1 17.9 19.8 21.6 23.6 25.3 26.1 26.2 25.3 23.9 22.7 21.7 20.4 19.5
Forest Potawatomi ppb 22.4 21.6 21.2 20 18.9
Jefferson Jefferson-Laatsch ppb 21.9 19.1 16.8 15.5 14.8 14.2 13.7 14.2 15.2 16.7 18.9 20.2 21 22.3 23.8 25.2 26.3 26.9 25.9 24.5 23.9 22.2 20 17.6
Kenosha Chiwaukee Prairie ppb 30.3 27.9 25.8 23.7 21.1 18.3 15.7 14.9 15.2 16.1 18.6 21.9 25.4 29 33.3 36.4 38.7 39.8 39.3 38.1 37.1 36 33.9 31.9
Kenosha Kenosha-Water Tower ppb 21.8 19.2 17.1 15.2 13.4 11 10 9.3 9 10.6 13.8 17.1 20.4 24.5 28.9 32.9 36 37.1 36.5 35.5 34.6 33.1 30.7 27.3
Kewaunee Kewaunee ppb 24.6 21.8 20.7 20.3 20.2 20.7 21.6 22.8 24.1 25.3 24.6 24.1 23.7 23.3 23 22.8 22.9 23.1 24 24 23.9 23.7 23.3 22.9
La Crosse La Crosse DOT ppb 28.6 26.3 25.2 24.3 21 18.2 16.3 15.1 15.5 15.9 16.4 17.1 18.4 19.9 21.2 22.3 23.1 23.7 24 23.3 21.7 20 18.1 16.3
Manitowoc Manitowoc ppb 25.9 23.3 20.1 17.5 15.8 15.5 16 16.8 18 19.3 21.3 22.9 23.5 23.7 23.8 23.8 23.9 24 23.8 23.1 22.2 21.4 20.4 19.4
Marathon Lake Dubay ppb 21.9 21.8 21.3 20.4 19.4 18.7 18.3 17.8 17.5 17.6 18.2 19.1 20 21.1 22 23 23.6 23.5 22.8 21.9 21.3 20.2 19.1 17.6
Milwaukee Bayside ppb 30.7 29.9 29.3 28.3 26.4 24.2 22.1 20.3 19.4 20.4 21.2 22.6 24.4 26.3 27.9 29.4 30.5 30.6 30.4 29.4 28 26.8 25.7 25
Milwaukee Milwaukee-16th St. Health Center ppb 26.2 25.8 25.3 23.9 22 19.3 16.5 13.8 11.5 10.2 11.4 14 17.2 20.8 24.2 27.5 29.6 28.8 28.1 26.8 25.3 23.4 21.8 20.4
Outagamie Appleton ppb 26.1 23.7 21.3 19.3 17.5 16.1 14.9 14.4 14.6 14.6 14.8 16.4 17.8 19.4 21.3 23 24.1 24.1 23.7 23.3 22.6 20.7 18.7 17.3
Ozaukee Grafton ppb 28.8 28.1 27.3 26.2 24.1 21.6 18.8 16.6 16 15.4 16.5 18.2 20.2 22.5 25.6 28.3 29.1 28.6 27.9 26.8 25.7 24.3 23.1 21.9
Ozaukee Harrington Beach Park ppb 28.5 27.4 25.9 23.7 20.8 17.9 16.1 16.1 16.6 17.4 18.7 20.3 22.4 24.7 26.5 26.6 26.6 26.4 25.9 25.1 23.9 22.6 21.4 20.4
Racine Racine-Payne & Dolan ppb 30.4 30.2 29.9 29.3 28.3 26.2 23.3 21.4 19.6 19 19.6 20.7 22.3 25.6 29.5 32.1 34.4 35.3 35.2 34.7 33.9 32.5 30.8 29.6
Rock Beloit-Converse ppb 25.4 22.1 19.6 17.4 15.3 13.9 13.3 13.2 13.8 14.7 16.7 19.9 23.1 26.1 28.8 30.5 32.1 33.4 33.2 31.5 29.8 27.9 26.2 24.9
Sauk Devils Lake ppb 24.1 22.4 21.4 21 20 18.8 18.1 17 15.9 15 14.5 14.7 14.7 15.2 16.1 17.2 17.6 17.8 17.5 16.5 15.6 14.1 11.9 9.7
Sheboygan Sheboygan-Haven ppb 27 25.4 23.1 20.3 17.7 15.7 14.4 14.3 14.9 15.9 17.4 19.1 20.8 22.4 23.8 24.1 24.1 24 23.7 23.2 22.4 21.5 20.9 20.3
Sheboygan Sheboygan-Kohler Andrae ppb 30.5 29.1 27.4 24.9 22.3 20.3 19.9 20.1 20.7 21.7 23 24.4 26.3 27.5 27.6 27.6 27.7 27.4 26.7 26.2 25.6 25.3 25.1 24.6
Vilas Trout Lake ppb 18 15.8 14.4 13.3 12.2 11.4 11.2 11.2 11.9 13.2 14.7 16.4 18.1 20.1 21.9 23.4 24.7 25.5 25.4 24.8 24.1 23 21.8 20
Walworth Elkhorn ppb 20.7 18.3 16.1 15.4 14.6 13.2 12.5 11.9 12.9 14.9 17.7 20.3 23.1 26.1 28.7 31.3 33 33.1 32.1 30.6 29.1 27 24.7 21.9
Waukesha Waukesha-Cleveland Ave. ppb 23.2 22.3 21.9 20.9 19.3 17.7 15.4 13.6 11.9 11.2 10.7 11.5 13.7 16.5 19.5 22.2 24.8 26.2 27 26.7 25.7 23.9 22.2 20.8