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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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Saturday, 
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 26 23.5 21.9 20.8 19.1 16.5 15 15 16.6 19.5 22.9 26.3 31 35.6 39.5 42.3 43.3 42.4 40.7 38.7 35.4 31.2 26.3 21.1
Brown Green Bay UW ppb 33.5 30.6 28 26.2 24.1 22.8 21.3 19.8 19.9 21.2 23.2 25.5 28.6 31.9 34.3 36.6 36.1 34.7 32.3 28.8 26.5 23.2 20.3 15.8
Columbia Columbus ppb 45.1 43.1 41 38.3 35.1 31.8 29.2 27.2 26.2 27.6 29.7 32 34.2 36.5 39 41 41.9 42.1 42.2 42.4 42.4 42.2 41 39.9
Dane Madison East ppb 38.4 32.8 27.5 23.3 18.9 16.2 14.6 15.7 19 22.5 27.1 31.5 36 39.4 43.3 45.2 46.2 47.1 46.8 45.5 44.8 43.8 42.5 41.2
Dodge Horicon Wildlife Area ppb 43.8 42.2 40.5 39.2 37.5 35.6 32.9 31.3 30.2 30.7 32 33 34.6 36.6 39.1 41.3 42.7 43 43.3 43.3 43.3 42.6 41 39
Door Newport Park ppb 34.1 30.5 27.2 24 20 16.7 16 16.5 18.3 20.2 22.4 25.8 30.5 35.1 37.9 40.2 41.6 41.7 41.1 39.6 36 32.1 28.5 25.8
Eau Claire Eau Claire DOT Sign Shop ppb 16.1 11.6 7.8 4.6 2.5 1.9 1.8 4.3 8.6 14.3 20.2 26.4 32.4 38.4 43.8 46.4 47.2 46.2 44.9 43.5 40.8 37.3 33 28.4
Fond du Lac Fond Du Lac ppb 41.3 39.5 38 36.8 35.2 33.9 33 32.4 32.1 33.2 34.3 35.3 37.9 40 42.6 44.4 44.9 44.8 44.3 44 42.4 41.4 39.2 37.6
Forest Potawatomi ppb 33 32.7 31 29 27.9 27.5 27.5 26.9 26.7 26.9 27.8 28.6 28.9 28.7 28.4 28.5 28.8 27.1 25.1 23.7 22.4 20.6 19.3 17.5
Jefferson Jefferson-Laatsch ppb 30.4 27.7 25.4 23.4 23.1 24 25.8 27.6 29.8 30.6 32.5 35.7 38.4 40.7 42.7 43.6 43.7 42.6 40.8 39.2 38.9 38.2 36.7 35.2
Kenosha Chiwaukee Prairie ppb 27.3 22.1 18.1 15.8 15.1 15.2 16.1 19.2 23.6 28.7 34 41.4 49.6 56.9 62.7 65.5 64.7 62.2 58.3 52.7 45.2 38.2 32.2 26
Kenosha Kenosha-Water Tower ppb 35.2 29.3 23.4 17.3 12.6 10.6 10.8 13.6 16.9 21.8 27.1 34 42 48.9 53.5 55.4 54.2 51.5 48.9 44.9 38.8 33.6 28.8 24.9
Kewaunee Kewaunee ppb 42.7 41.4 39.6 36.5 33.5 30.3 28 26.3 25.9 26.4 28.2 30.2 32.8 36.2 40.3 44.4 46.8 46.4 44.6 42.1 38.7 34.7 29.6 24.2
La Crosse La Crosse DOT ppb 31.7 27.1 23.1 20.7 17.6 15 13.7 13.4 13.8 16.8 21.2 25.9 31.2 36.2 40.9 44.5 47 47.6 46.2 43.7 40.4 36.9 35.1 34.1
Manitowoc Manitowoc ppb 34.6 30.6 26.7 23.7 21.5 21.4 21.2 22.2 24.1 25.9 28.5 31.1 34.6 39.5 44.2 46.5 48 47.6 44.7 41.6 37.1 31.9 27 22.4
Marathon Lake Dubay ppb 32.1 31.2 31 29.6 28.4 27.6 28 28.6 30.4 33.1 36.1 40.3 43.9 47.1 49.5 51.4 50.5 47.3 42.9 38.4 34.1 29.5 24.7 20.3
Milwaukee Bayside ppb 23.8 19.2 15.8 14 13.4 14.6 17.6 21.9 26.7 31.2 34.8 38.4 42.1 44.7 46.3 47.5 48.2 48.1 47.3 45.3 42.9 41.1 39 36.1
Milwaukee Milwaukee-16th St. Health Center ppb 34.1 31.9 30.6 30.2 30.6 31.9 32.9 33.9 35.2 36.3 38.4 40.6 43.4 45.1 45.7 45.7 45 44.6 42.7 40.2 37.4 35.7 34.2 32.9
Outagamie Appleton ppb 38 34.9 32.2 30 28.1 26.2 24.4 23.9 24.5 25.5 27.1 29.3 32.2 35.6 38.7 40.3 40.4 40.2 38.6 36.2 33.5 29.7 25.4 21.7
Ozaukee Grafton ppb 30 28.1 26.4 25.7 26.9 29 31.3 33 34.7 36.4 38.6 39.2 39.4 39.8 40.7 41 40.5 39.9 38.5 38.1 37.3 36.8 35.6 34.7
Ozaukee Harrington Beach Park ppb 36.2 34.7 34.1 34.1 34.7 35.4 35.7 35.7 35.6 36.2 37.5 38.7 38.9 39.2 39.5 39.9 39.7 39 37.6 34.8 33 31.2 30.3 29
Racine Racine-Payne & Dolan ppb 34.7 30.8 27.4 24.9 24.3 24.6 24.2 23.7 25.4 27.6 32.4 38.5 45.3 51.2 58.1 62.5 63.7 62.9 59.5 54.3 48.2 42.6 37.3 34.7
Rock Beloit-Converse ppb 28.1 22.8 17.8 15.9 14.3 12.6 13.4 17.3 22.2 27.2 32.4 37.3 42.4 48 52.1 53.2 52.8 51.4 49.9 48.6 46.3 43.6 41 38.7
Sauk Devils Lake ppb 32.5 29.6 27.2 25.9 24.3 22.3 20.9 22.4 24.1 25.9 28.4 31.5 34.3 37.5 40.4 41.5 42 42 42.3 42 41.7 41.4 41.1 39.8
Sheboygan Sheboygan-Haven ppb 36.4 33.6 31.6 30.7 30.5 30.4 30.3 30.6 31.4 32.2 33.2 34.3 35 36 37.2 38 38.8 38.8 37.7 35.7 33.7 31.1 29.1 27.1
Sheboygan Sheboygan-Kohler Andrae ppb 32.2 29.3 26 24.4 24.6 25.8 27.5 29.6 31.1 33.1 36.9 41.6 45.4 47.8 49.2 50.2 49.9 49.2 46.4 41.5 36.3 32.7 29.7 26.8
Vilas Trout Lake ppb 22.2 19.4 17.3 15.6 14.4 13.7 14 15.6 17.7 20.1 22 24.1 24.6 26 27.6 29 30.6 30.9 30 28 26.8 24.8 22.5 19.8
Walworth Elkhorn ppb 48 44.7 43.9 42.5 40 37.2 35 34.4 36 38.3 39.4 41.1 43.7 46.5 48.7 49.3 48.1 45.8 43.6 40.8 38.1 36 34.3 32.5
Waukesha Waukesha-Cleveland Ave. ppb 37.7 33.9 31.3 29.8 28 26.4 25.1 26.2 28.3 30.7 32.7 34.3 37.8 40.8 41.9 41.1 39.8 38.6 36.5 34.5 31.9 30.1 29.7 29.1