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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 8/11/2025 10:00 to 8/12/2025 15:00 for these counties: Adams,Ashland,Barron,Bayfield,Brown,Buffalo,Burnett,Chippewa,Clark,Door,Douglas,Dunn,Eau Claire,Florence,Forest,Iron,Jackson,Juneau,Kewaunee,La Crosse,Langlade,Lincoln,Marathon,Marinette,Menominee,Monroe,Oconto,Oneida,Outagamie,Pepin,Pierce,Polk,Portage,Price,Rusk,Sawyer,Shawano,St. Croix,Taylor,Trempealeau,Vernon,Vilas,Washburn,Waupaca,Waushara,Wood .

8-HR Ozone Summary

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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 14.4 12.1 9.8 8.3 8.1 8.9 9.7 10.5 10.9 12 12.8 13.8 14.9 16 17.8 19.7 20.9 20.8 20.2 18.6 17.1 16.9 18.6
Brown Green Bay UW ppb 13.2 11 9.7 9.1 7.5 7 7.5 9.4 11.4 13.6 16.1 18.9 21.8 24.7 27.6 30.1 32.4 33.1 33.2 32.8 32.1 30.8 28.7 26.2
Columbia Columbus ppb 38.7 36.5 34.3 31.6 28.1 25.2 23.3 22.8 23.2 24.3 25.9 28.1 31.5 35 38.3 40.4 41.7 42.3 42.4 42 40.8 39 37.3 34.8
Dane Madison East ppb 39.6 36.9 34.4 31.7 28.9 27.3 26.9 26.8 27.6 29.9 33 36.9 41 44.2 46.3 48.2 49.4 49.8 49.2 47.5 44.7 42.2 40.1 37.1
Dodge Horicon Wildlife Area ppb 37.1 35.4 32.8 30.3 27.3 25 23.9 23.5 23.1 23.1 23.7 25.1 28 30.9 33.5 35.8 38.2 40.1 41.1 40.8 39.6 37.8 35.7 33.1
Door Newport Park ppb 23.2 21.3 19.4 17.6 16.7 16.5 16.2 16 16.1 16.4 17.8 19.7 21.8 23.4 25 26.5 27.7 28.3 28.8 28.9 28.5 28.3 27.4 26.4
Eau Claire Eau Claire DOT Sign Shop ppb 24 19.9 15.4 11 7.6 5.2 4.4 5.7 8.6 12.7 17.4 22.3 27.6 33.2 38.1 41.2 43.1 43.5 43.4 41.6 37.9 32.9 27.5 22.4
Fond du Lac Fond Du Lac ppb 36.1 34.2 32.3 30 27.9 25.7 24.1 22.5 21.4 21.2 22.3 24.2 26.4 28.7 31.2 34 36.5 38.1 38.1 36.8 35.4 33.9 31.7 29.5
Forest Potawatomi ppb 15.2 14.5 13.9 13.4 13 13.6 14 14.8 15.8 17 18.4 19.9 21.6 23.1 24.6 25.3 25.3 25.5 24.7 23.3 22.2 21.4 20.7 20.1
Jefferson Jefferson-Laatsch ppb 33.8 32.9 31.6 29.4 25.9 22.5 20.8 20.5 20.9 22 24.8 28.3 31.9 35.8 38.4 40.2 41.9 42.9 42.1 40.1 36.4 32.5 29.8 26.9
Kenosha Chiwaukee Prairie ppb 22.1 20.6 21.5 22.4 21.8 21.6 22.2 24.3 27.4 29.8 30.7 31.7 35.6 39.4 42.3 44.4 45.3 45.5 45.2 44.2 41.1 37.4 32.8 28.4
Kenosha Kenosha-Water Tower ppb 22.5 20.8 18.9 17.7 16.5 15.7 15.6 15.3 16.3 18.8 22.5 26.2 30.7 34.7 37.8 40.6 42.4 43 42.2 41.3 40 38.4 37.2 35.9
Kewaunee Kewaunee ppb 20 17.8 16.9 16.4 16.3 16.5 17.2 18.1 18.9 19.7 20.1 21.2 22.8 23.9 24.6 25.4 26.3 26.8 27.2 27.1 26.7 26.4 26.2 26
La Crosse La Crosse DOT ppb 33.7 33.2 32.3 31.4 30.5 29.2 27.3 25.3 24 23.7 25.1 28 32.2 37.1 40.6 43.5 45.4 46.7 47.3 46.6 44.4 41.4 38.3 35.2
Manitowoc Manitowoc ppb 18.1 15.4 13.9 12.7 12.5 11.8 11.3 11.8 13.1 15.1 17.8 20.2 22.5 25 27.2 28.7 29.4 29.6 29.3 27.8 25.7 23.2 21.7 20.8
Marathon Lake Dubay ppb 17.5 15.1 13.7 13 12.3 11.5 11.5 11.4 11.9 13.9 16.5 19.5 22.4 26 29.6 33.1 35.6 37.2 37.3 36.8 36.3 34.9 32.4 29.6
Milwaukee Bayside ppb 34 31.7 28 24.7 21.4 18.8 17.2 16.9 16.3 16.4 18.7 22.1 26.2 29.2 31.9 34.2 35.9 37.6 38.4 37.8 35.3 32.6 29.1 25.3
Milwaukee Milwaukee-16th St. Health Center ppb 31.6 29.2 28 26.9 25.8 24.7 24.4 24.1 23.5 24 24.9 26.2 28.2 31 32.6 34.1 35.2 35 32.9 31.4 30.2 28.4 27.3 25.7
Outagamie Appleton ppb 18.6 15.9 14.6 13.3 12.1 11.4 11.7 12.5 14 15.7 17.6 21.2 25.6 29.5 33 36.5 39.1 41 42.1 40.9 38.3 35.8 32.7 28.6
Ozaukee Grafton ppb 34 32.4 30.3 26.6 24.5 23 21.3 20.1 19.8 19.9 21.2 24 26.6 28.7 31.1 33.8 35.9 37.3 38.6 39.9 40.7 41 40.6 38.7
Ozaukee Harrington Beach Park ppb 26.9 25.1 22.9 21.9 20.8 19.4 17.6 16.8 17.7 18.5 19.5 20.6 22.6 25.5 28.3 30.9 32.7 34.4 35.9 36.8 37.3 36.6 35.5 35.2
Racine Racine-Payne & Dolan ppb 33.5 33.1 32.6 32.6 32.4 32.1 31.4 30.9 30.8 31.2 31.8 32.9 34.5 36.3 39 40.2 41.2 42.1 42.4 41.9 40.8 39.9 38.8 37.3
Rock Beloit-Converse ppb 36.5 34.3 31.5 28.9 26.7 24.2 23.1 23.6 25 27 29.9 33.1 37.2 42 45.2 46.9 47.1 46.6 45.7 43 39.2 35.4 31 26.4
Sauk Devils Lake ppb 37.3 34.8 31.2 28 24.8 21 18.5 17.2 18.1 20 22.7 25 28 31.9 34.7 37.3 38.3 38.1 36.3 34.4 31.3 27.4 22.9 18.3
Sheboygan Sheboygan-Haven ppb 24.3 21.6 19.9 18.5 17 16 14.9 15.1 16.2 17.8 19.6 21.8 24.2 26.5 28.5 29.7 30.2 30.3 30.1 29.4 28.4 27.5 26.1 24.8
Sheboygan Sheboygan-Kohler Andrae ppb 24.1 21.4 19.4 18.4 17.9 17.3 17 17.4 18.7 20.1 22 23.9 25.6 27.4 28.8 29.9 30.9 31.7 32.4 32.7 32 30.8 29.2 29
Vilas Trout Lake ppb 15.9 12.2 9.4 7.5 6.4 5.9 5.8 6.7 8.3 10.5 13.5 16.6 20.1 23.4 26.7 29.2 31.1 32.3 32.7 32.2 31.5 30.8 30 29.4
Walworth Elkhorn ppb 30.7 29 27.1 26.1 24.9 22.3 20.7 21.1 22.8 25.1 28.5 31.9 35.6 40.2 43.6 45.4 46.3 46.6 46.2 44.2 41.9 38.9 36.3 33.9
Waukesha Waukesha-Cleveland Ave. ppb 28.2 26.9 25.9 24.3 22.8 21.4 20.7 20.8 21.1 22.3 24.9 28.4 31.9 35.1 37.7 39.7 41.7 42.9 42.7 41.4 40 38.1 36 33.9