-
Noise monitoring program
Active Air Quality Notification
  • An air quality ADVISORY for Unhealthy PM2.5 levels is in effect from 7/24/2025 15:00 to 7/25/2025 23:00 for these counties: Adams,Ashland,Barron,Bayfield,Brown,Buffalo,Burnett,Calumet,Chippewa,Clark,Dodge,Door,Douglas,Dunn,Eau Claire,Florence,Fond du Lac,Forest,Green Lake,Iron,Jackson,Juneau,Kenosha,Kewaunee,La Crosse,Langlade,Lincoln,Manitowoc,Marathon,Marinette,Marquette,Menominee,Milwaukee,Monroe,Oconto,Oneida,Outagamie,Ozaukee,Pepin,Pierce,Polk,Portage,Price,Racine,Rusk,Sawyer,Shawano,Sheboygan,St. Croix,Taylor,Trempealeau,Vernon,Vilas,Washburn,Washington,Waukesha,Waupaca,Waushara,Winnebago,Wood .

8-HR Ozone Summary

Filter by County:
Filter by Site:
Sunday, 
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 12.5 9.9 7.1 4.6 3.2 2.5 1.8 1.8 2.9 4.2 5.5 7.3 9.4 11.7 13.9 15.7 16.8 17.9 18.4 17.6 15.8 13.7 11.4 9.2
Brown Green Bay UW ppb 22.1 22 22.8 23.9 24.4 24.9 24.5 24.1 23.7 23.8 23.7 24.1 25.1 26.4 27.7 28.4 28.8 28.7 27.6 27.1 25.6 24.7 23.1 22.6
Columbia Columbus ppb 27.8 27.1 26.9 26.9 27.2 27.6 28 28.4 29.3 30.7 31.9 32.4 32.5 32.6 32.5 32.2 31.6 30.5 29.6 28.6 27.4 25.7 24.7 23.3
Dane Madison East ppb 29.5 27.7 27.1 27.2 28 29.3 30.3 30.9 31.6 33 33.5 33.5 32.9 31.8 31.2 30.6 30.3 29.4 28 25.3 21.6 18.1 14.5 11.1
Dodge Horicon Wildlife Area ppb 28.2 28 27.7 27.9 28.3 28.6 28 27.6 27.9 28.6 29.8 30.9 31.7 32.3 33.3 33.8 33.2 32.2 30.7 28.9 26.5 24.3 21.9 19.6
Door Newport Park ppb 32 31.9 30.9 30.5 29.7 28.7 28 28.1 27.9 27.1 27.3 27 26.4 26.6 27.6 29.1 30.7 31.7 32.9 33.7 33.6 32.2 30.5 28.8
Eau Claire Eau Claire DOT Sign Shop ppb 11.4 9.3 8.2 7.9 7.7 7.7 7.8 8.5 10.2 12.5 14.9 17.2 20.3 24.1 28.2 31.9 34.4 35.6 34.8 31.9 28.1 23.4 18.6 13.7
Fond du Lac Fond Du Lac ppb 27.2 27.2 27.6 27.6 27.9 28.2 27.9 27.5 27.5 27.8 28.2 29.3 30.1 30.8 32 32.3 32 31.2 30.3 29.1 26.2 24 21.8 20.1
Forest Potawatomi ppb 19.1 20.1 21.1 21.6 21.9 22.5 22.5 21.9 21.5 21.3 21.6 22.1 22.5 22.4 22.4 22.3 21.6 20.6 19.1 17.3 16.2 15.2 14.3 13.3
Jefferson Jefferson-Laatsch ppb 29.5 28.1 27.3 27.5 27.4 27.1 26.9 27 27.6 28.9 30 30.6 31.4 32.6 33.3 33.7 33.4 32.1 30.7 28.1 24.3 20.2 16.2 12.5
Kenosha Chiwaukee Prairie ppb 31.6 28.9 27 25.8 25.9 27 28.1 28.7 29 29.2 29.3 30.2 32.3 35 38.2 41 43.4 45.3 46.2 44.4 41 36.3 31.5 27.5
Kenosha Kenosha-Water Tower ppb 28.1 25.9 25 23.8 23.4 21.3 20.2 21 22.2 23.1 23.4 25 27.3 32.2 36.9 39.6 41.6 42.9 43.3 42.5 40.5 37.1 32.7 28.3
Kewaunee Kewaunee ppb 39.6 40.4 41.5 41.8 40.7 38.4 36.1 33.6 31.5 30.1 28.8 28.3 29.4 31.7 33.7 36 37.9 38.9 39.3 40.3 39.9 39 37.4 35.5
La Crosse La Crosse DOT ppb 23.5 21.5 20 18.9 18.5 19.2 20.5 22.5 24.4 25.8 27.1 28 28.3 28.9 29.8 31.1 32.5 33.7 33.5 32.2 30.9 28 24.3 20
Manitowoc Manitowoc ppb 40.6 39.8 37.5 35.1 31.9 28.5 25.1 22.9 21.2 19.9 21.1 23 26 29.5 33 35.5 37.7 39.6 40.4 40.6 40.4 39.7 37.3 33.6
Marathon Lake Dubay ppb 15.8 14.9 13.7 13.1 12.3 11.7 11.6 11.2 11 10.9 11.4 12.2 13.2 14.5 16.2 18.4 20.4 21.6 22.2 22.3 22 21.1 19.4 17.2
Milwaukee Bayside ppb 32 30.6 28.7 27.1 27.1 28.3 27.9 26.9 26.3 25.4 25.8 26.6 27.2 28.4 30.5 33.4 35.8 37.5 36.8 34.5 32 28.9 24.7 19.8
Milwaukee Milwaukee-16th St. Health Center ppb 27.6 27.4 27.4 27.3 27.3 26.6 25.9 25.5 25.3 25.7 26.7 27.6 28.6 28.9 29.7 30.2 30.9 31.7 31.3 30.3 29.3 29.2 27.7 26
Outagamie Appleton ppb 17.6 15.7 14.4 13.6 12.9 12.4 11.7 10.9 10.7 11.6 14.5 17.5 20.7 24.1 26.9 29.3 31.1 31.7 29.8 27.3 24.6 21.6 19.3 16.8
Ozaukee Grafton ppb 34 33 30.8 28.5 26.8 27.6 28.6 29.2 29.2 29.1 29.1 29.7 30.6 31.3 32.2 34.4 36.8 38 38.6 37.8 34.8 31.5 27.6 23.5
Ozaukee Harrington Beach Park ppb 40.4 38 35.3 32.1 28 24.6 22 21.2 21 21.7 22.5 24.1 26.8 30 33.3 35.2 37.4 39.4 40.9 41.2 39.7 36.7 33.6 30.2
Racine Racine-Payne & Dolan ppb 37.7 34.9 32 29.6 27.9 27.6 27.6 27.5 27.7 28.6 29.9 30.7 31.9 34.3 37.5 40.7 43.4 45.1 45.9 46.7 46.1 43.1 39.8 35.7
Rock Beloit-Converse ppb 27.6 26.4 26.4 27.5 29.1 28.9 28.1 28.2 28.8 29.4 30.3 31.4 32 33.1 34.6 35.4 35.9 36 34.5 31.8 29.2 25.7 21.9 19
Sauk Devils Lake ppb 26.6 27 28.2 28.7 29.3 29.6 30.2 31.1 31.6 32.1 32.4 32.7 32.5 31.8 30.9 29.9 28.9 27.5 24.6 21.1 17.5 14.3 11.1 7.8
Sheboygan Sheboygan-Haven ppb 32.1 30.5 29 27.1 24.9 23.3 22 20.8 21.2 22.2 23.1 24.1 25.7 27 28.7 31.1 32.2 32.9 33.3 33.2 32.9 31.8 29.5 26.6
Sheboygan Sheboygan-Kohler Andrae ppb 48.8 47.3 44.6 41.9 39 35.7 32.4 29.5 27.5 27.2 28.4 29.9 31.9 33.8 36.3 38.7 40.8 42.4 43.9 45.1 45.8 45.1 41.1 36.5
Vilas Trout Lake ppb 13.4 14.1 14.6 15.3 14.9 15.2 16.4 16.5 16.5 16.3 16.3 16.8 17.5 18.4 19.4 20.4 21 20.6 19.3 17.3 15 12.7 10.4 8.7
Walworth Elkhorn ppb 29.1 28.1 27.4 26.9 26.6 26.1 25.3 24.9 25.1 25.6 26.3 28.4 30.4 31.9 33.6 34.6 35.1 35.2 33.9 31.1 27.4 23.9 20.5 18
Waukesha Waukesha-Cleveland Ave. ppb 26.7 25.5 25.3 25.1 24.7 23.6 23 22.7 23 24.4 25.6 26.7 28 29.5 30.7 31.7 32 31.4 30.6 29.6 28.6 26.7 23.7 20.3