-
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

Filter by County:
Filter by Site:
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 22.7 20.2 18.5 16.8 14.7 13.5 11.4 9.2 7.8 8.8 10.4 12.1 14.3 16.6 18.7 20.3 21.3 21.2 20.7 20.1 18 15.9 13.6 11.2
Brown Green Bay UW ppb 25.6 24 22.3 20.8 18.7 17 16.1 15.7 15.9 16.8 17.7 18.5 20 21.5 22.6 23.3 23.1 22.3 21.9 21.4 20.4 19.1 17.5 16.4
Columbia Columbus ppb 23 22.1 21.5 21.2 20.3 19.4 18.7 18.4 19 20 21.6 23.4 25.2 27 29 30.7 31.9 31.9 31 29.7 28.1 26.1 24 21.7
Dane Madison East ppb 22.9 21.1 19.4 17.7 15.6 13.5 11.8 10.7 11.5 13.1 15.5 18.4 22 25.5 28.7 31.7 32.9 33.5 33.3 32.2 30 27.9 25.8 23.7
Dodge Horicon Wildlife Area ppb 22.3 21.1 20.8 19.9 18.9 17.8 16.9 17.1 17.9 19.1 20.7 22.8 25 27.7 30 30.8 31 30.4 29.4 28 26.5 24.8 23.2 21.7
Door Newport Park ppb 22.6 21 19.6 18 16.9 16 15.7 16.1 16.9 18.1 19.6 21.1 22 22.8 23.2 23.4 23.4 23.1 22.6 22.4 22.1 22 22 22
Eau Claire Eau Claire DOT Sign Shop ppb 9.1 5.8 3.4 1.7 1 1 1.2 2.1 3.7 5.5 7.7 10.8 14 17.1 20.1 22 23.3 24.2 24.4 23.6 22.5 21.4 20.2 18.9
Fond du Lac Fond Du Lac ppb 23.3 21.8 20.7 20.1 19.8 19.7 18.9 18.7 19.5 20.6 22.1 23.4 25.1 26.9 28 28.1 28 27.1 25.5 23.9 21.6 19.7 18.2 17
Forest Potawatomi ppb 22.6 21.4 20.8 20.7 20.5 19.8 19.1 18.4 17.6 17.1 17 17 17.2 17.5 17.1 17.3 17.8 18.2 17.5 16.3 14.8 13.6 13.3 13.1
Jefferson Jefferson-Laatsch ppb 20.9 18.6 17.1 15.9 14.4 12.3 11 10.6 11.5 13.2 15.6 18.4 21.9 25.6 28.9 31.3 33 33.5 33.1 32 30.3 28.6 26.1 23.4
Kenosha Chiwaukee Prairie ppb 23.9 20.6 19 17.8 17.8 17.5 18.9 20.4 21.7 23.6 24.7 26.4 28.2 30.3 30.9 31.1 31.3 31.1 30.9 30.5 30.1 29.6 29.1 28.9
Kenosha Kenosha-Water Tower ppb 21.9 19.2 17.5 16.5 15.1 13.7 14.3 15.8 17.4 19.4 21.1 23.1 25.3 28.2 29.3 29.5 29.6 29.5 29 28.5 28.2 27.6 26.9 26
Kewaunee Kewaunee ppb 23.8 23.1 21.9 21.1 20.5 19.7 19.1 19 19 19.2 20.2 21 21.8 22.6 23.1 23.2 23.4 23.6 23.7 23.7 23.4 22.1 20.9 20.1
La Crosse La Crosse DOT ppb 21.3 18.6 16 13.5 11.4 9.8 8.3 7.8 8.2 10.5 13.2 17 21 24.8 28.6 31.6 33.7 34.2 33.7 32 30.3 28.6 27 25.4
Manitowoc Manitowoc ppb 19.4 17 15.8 15.3 14.7 13.2 11.9 10.8 10 22.6 21.9 21.1 19.9 19.4 16.5 15.1 13.2
Marathon Lake Dubay ppb 23.2 21.5 19.4 16.9 14.6 12.1 10.4 9.5 9.6 9.8 9.5 9.9 13.6 17.4 20.4 23.3 25.1 26.3 25.4 24.4 23.1 21.3 19.7 17.9
Milwaukee Bayside ppb 27.2 25.4 24.4 24.6 25.1 25.2 26 26.5 27 27.6 27.8 27.8 27.7 27.6 27.7 27.8 27.8 27.6 27.5 27.4 27.3 27.2 27 26.8
Milwaukee Milwaukee-16th St. Health Center ppb 24.3 22.6 20.8 19.7 19.9 20.1 20.8 21.5 22.2 23.2 24.4 25.5 25.9 26.2 26.5 26.8 27 26.8 26.5 26.2 25.8 25.5 25.4 25.1
Outagamie Appleton ppb 22 20.3 18.4 17 15.4 13.2 11.8 11.3 11.5 11.7 12.4 13.6 15.4 17.5 19.5 21.3 22.4 22.9 23.3 22.7 21.9 20.5 18.3 16
Ozaukee Grafton ppb 24.4 22.6 20.9 19.5 18.6 16.2 15 15.8 16.8 17.8 19 21.1 23 26.2 28.4 28.4 28.2 28 27.7 27.3 26.9 25.7 23.7 21.6
Ozaukee Harrington Beach Park ppb 23.8 22.2 22.2 22.3 22.7 23.2 23.7 24.3 24.9 25.8 25.8 25.8 26.1 26.4 26.6 26.5 26.3 26.2 25.9 25.5 25 24.7 23.9 23
Racine Racine-Payne & Dolan ppb 31.7 29.9 28 26.1 24.4 23.4 23.8 24.9 25.4 25.8 26.3 27 27.6 28 28.3 28.7 28.6 28.7 28.4 28.3 28.1 27.7 27.5 27.2
Rock Beloit-Converse ppb 24.6 23.3 21.8 20.3 19.4 18.5 17.4 17.2 17.4 18.4 20.1 22.6 25.3 28.1 31 33.5 35.3 35.6 35.3 34 32.1 30.1 27.9 25.2
Sauk Devils Lake ppb 23.5 21.1 18.7 16.4 14.3 12.4 11.1 11.3 12.7 14.7 17.3 20 23 26 28.5 30.3 31.1 31.3 30.9 30.3 29.4 28.2 27.1 25.4
Sheboygan Sheboygan-Haven ppb 22.7 20.9 19.2 18.1 17.2 16.3 15.2 14.6 15.4 16.5 17.8 19.1 20.6 21.9 23.1 23.9 23.7 23.2 22.5 22 21.3 20.3 19 17.2
Sheboygan Sheboygan-Kohler Andrae ppb 25.4 24.5 24.2 24.5 25.1 26.1 26.6 27 27.7 27.7 27.6 27.8 27.9 28 27.8 27.6 27.3 26.7 26.5 26.1 25.6 25.4 25.3 25.2
Vilas Trout Lake ppb 18.8 15.7 12.3 9.8 9 8.5 8.6 9 10.1 11.5 13.4 15.1 16.3 17.9 19.3 20.1 20.1 19.6 18.9 18 16.5 15.1 13.4 12.2
Walworth Elkhorn ppb 22.5 20.3 18.9 17.7 16.3 15.5 15.5 16.2 17.6 19.2 20.7 22.8 25.3 27.7 29.4 30.4 31.1 31.1 30.1 28.8 27 25.2 23.3 21.9
Waukesha Waukesha-Cleveland Ave. ppb 24.3 22.8 21.7 21.1 20.5 19.2 18.1 18.2 18.9 20 21.1 22.8 24.7 26.3 27.7 28.5 28.9 28.7 28 26.5 25 23.7 22.5 20.8