-
Noise monitoring program
Active Air Quality Notification
  • An air quality ADVISORY for Unhealthy PM2.5 levels is in effect from 7/29/2025 08:30 to 7/31/2025 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,Jefferson,Juneau,Kenosha,Kewaunee,La Crosse,Lafayette,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:
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 17.8 17 16.9 16.6 16.2 16.3 17.3 17.9 17.7 17 15.9 15.2 14.7 14.9 15.1 15.3 15.4 15.8 16.3 16.5 16.5 16.5 16.5 16.6
Brown Green Bay UW ppb 26.8 23.8 22.5 21 20.2 18.8 17.9 16.8 16.3 16.2 15.8 15.6 15.2 15.1 14.5 14.2 14 13.8 14 13.8 13.2 12.7 12.1 11.4
Columbia Columbus ppb 32.8 30.2 28.2 27 26.3 25.6 25 24.1 23.2 23.7 24.6 25.5 26.4 27.8 28.1 28.1 28.1 26.9 24.3 21.2 18.1 15.7 14.8 14.4
Dane Madison East ppb 21.4 16.8 13.9 12.7 12.4 12.3 12.3 12.5 13.8 16.2 18.7 21.1 22.9 24.9 27.5 31 31.5 29.8 27 24.1 21.3 18.2 15.4 12.4
Dodge Horicon Wildlife Area ppb 37 34.2 32.2 31 29.7 28.2 26.6 25.2 23.6 23 23.9 24.7 24 23.7 23.1 22.6 22.1 21.2 18.9 16.6 15.9 15.4 15.1 14.8
Door Newport Park ppb 20.6 15.9 14.9 13.5 11.9 11.4 10.7 10.6 11.4 12.9 13.4 13.8 13.7 13.5 13.5 13.7 13.5 13.2 12.7 12.4 12 11.7 11.2 10.7
Eau Claire Eau Claire DOT Sign Shop ppb 7.5 3.9 2.2 2.5 3.9 5.5 7.1 8.9 10.4 12.3 14.3 15 15.5 15.4 14.8 13.8 13.7 13.3 12.8 12.4 11.2 10.7 10.7 10.7
Fond du Lac Fond Du Lac ppb 33.5 31.9 30.4 29.5 28.4 27.8 27 26.1 25 24 23.4 22.6 22.3 21.2 20.3 19.3 18.4 17.6 16.4 16 15.4 15 14.6 14.2
Forest Potawatomi ppb 20.8 19.3 18.3 16.9 14.7 12.6 12 12.1 11.5 10.7 10.3 10.2 10 10 10 9.8 9.6 9.6 9.5 9.2 9 9.1 9.1 9.4
Jefferson Jefferson-Laatsch ppb 19 14.8 11.8 9.7 9 9 9.5 9.9 11.1 13.3 16.2 19.8 22.9 26.5 30.6 33.9 34.5 33.4 31.3 28.7 26 22.6 19.3 16.4
Kenosha Chiwaukee Prairie ppb 25.5 19.8 15.2 11.4 8.3 6.1 4.3 4.8 7.4 10.7 15.6 21.5 27.2 32.6 37.7 42 43.8 43.8 42.6 39.4 36.2 32.6 29.2 25.4
Kenosha Kenosha-Water Tower ppb 28.7 23.3 19.6 16 12.6 9.7 7.7 6.6 7.7 11.8 16.3 21.5 26.8 32.3 36.8 40.9 43.7 43.3 41.4 37.9 34.7 31 27.4 23.6
Kewaunee Kewaunee ppb 32.3 30.5 28.8 27.9 27.6 27.2 25.9 24.7 23.9 23.1 22.1 20.9 19.3 17.8 17.3 16.8 16 15.5 15.2 14.5 13.8 13.1 12.6 12.4
La Crosse La Crosse DOT ppb 17.9 13.8 9.8 7.5 6.2 5.9 8 11.5 15.2 18.3 21.5 24.6 27.4 30.2 31.6 32.1 32.6 33.3 32.3 30.3 28 25.5 22.1 18.9
Manitowoc Manitowoc ppb 17.1 15 15.3 15 13.6 14.4 15.8 18.2 17.6 17.7 18.1 19.3 20.6 19.9 18.1 15.8 15.4 14.9 14.5 14 13.4 12.9 12.3 11.9
Marathon Lake Dubay ppb 24.5 20.6 17.6 14.9 13.6 12.2 11.7 11.4 11.9 13.1 13.8 14.1 13.8 13.6 13.5 13.5 13.4 13.4 13.4 13.3 13 12.7 12.4 12.3
Milwaukee Bayside ppb 30.3 25.4 20.6 15.7 10.9 7.8 6 5.3 5.8 8.4 11.7 17.1 20.5 22.6 24.5 26.6 27.6 26.5 25 21.2 19.6 18.6 17.3 15.7
Milwaukee Milwaukee-16th St. Health Center ppb 31.7 28.7 26.1 22.9 19.1 15.4 12.1 10.1 9.7 11.6 14.6 18.9 24.4 27.7 30.9 33.3 33.6 31.7 28.3 24.2 20.1 18.4 16.1 13.7
Outagamie Appleton ppb 26.9 23 19.7 17.1 15.4 13.9 12.3 12.5 13.5 14.7 15.5 16.4 15.9 15.8 16 15.5 14.7 14.7 14.6 14.4 14.1 13.7 13 12.2
Ozaukee Grafton ppb 37.5 34 31.1 28.6 25.4 21.3 18.1 14.6 12.5 12.7 13.1 15.8 17.8 20 21.2 22.8 23.6 23.1 22.1 19.8 18.7 17.7 16.5 15.2
Ozaukee Harrington Beach Park ppb 35 32.5 30 28.4 26.3 23.6 21.5 20.5 19.2 20.4 21.5 22 22.1 23.2 23.8 23 22.6 20.9 18.9 17.1 16.5 15.5 14.4 13.8
Racine Racine-Payne & Dolan ppb 35.5 31.5 27.2 22.9 18.3 13.9 10.3 7.7 6.9 8.7 12.6 17.8 23.4 28.2 31.8 35.3 37.3 37.1 34.4 30.7 26.8 23.4 21.2 18.9
Rock Beloit-Converse ppb 16.7 11.4 7.7 5.1 4 4.1 4.6 6.3 9 12.6 16.6 20.8 24.2 28.4 32.7 36.2 38.7 39.9 38 35.7 35.3 33.7 32.1 28.4
Sauk Devils Lake ppb 12.5 9.9 10.1 11.6 13.7 16.2 17.4 18 18.6 20.2 21.5 22.8 24.1 24 23.9 23.5 22.9 21.3 19.4 17.1 14.6 13.3 12.5 11.9
Sheboygan Sheboygan-Haven ppb 32.7 31.6 30 28.3 26.3 23.9 22.2 21.1 20.8 20.7 20.7 20.4 20.5 20.8 20.4 19.6 18 16.2 15.3 15.1 14.4 13.8 13.5 13.2
Sheboygan Sheboygan-Kohler Andrae ppb 34.8 29.1 25.4 23.5 21.7 19.5 19 18 17.1 16.8 17.9 18.8 19.6 21.1 21.3 20.7 20.4 19.7 17.9 17.2 16.5 15.5 14.7 14.1
Vilas Trout Lake ppb 12 10 8.8 9.2 9.8 10.6 11.5 12 12.1 12.1 11.5 10.9 10.4 9.8 9.2 9 9.3 9.4 9.2 9.2 9.3 9.5 9.7 9.8
Walworth Elkhorn ppb 41.4 41.5 39.9 37.8 34.7 31.4 28.2 25.4 22.8 21.3 22.7 24.8 27.2 29.8 33.2 36.3 38.6 39.6 39 37.2 36.5 36.1 33.1 29.4
Waukesha Waukesha-Cleveland Ave. ppb 26.2 22.6 18.6 15.5 12.4 10.3 8.2 7.6 8.1 10 13.2 17.4 22.2 26.7 31.1 34 34.9 34 31.4 27.8 24.2 21.1 18.1 15.5