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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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Monday, 
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 19.6 20 20.8 23.2 26.5 29.2 30.4 28.7 27.6 27.2 28.5 29.3 30.1 30.8 31.8 34 36.4 38.6 38 35.3 31.4 27.8 23.6 18.6
Brown Green Bay UW ppb 23.6 22.4 21.2 20.1 18.7 17.4 17 17.5 19 22.2 26.2 30.6 35.4 40.5 44.9 47.7 48.3 47.4 46.6 45.7 44.6 43.1 41.2 40
Columbia Columbus ppb 32.3 29.6 27 24.2 21.8 20.8 20.1 21 22.8 26.4 30.5 35 39.3 43 46.1 48 49.5 50.4 50.5 50.2 50.9 50.8 49.7 49
Dane Madison East ppb 33.6 31 29.1 27 25.5 24.3 23.6 25.1 28.2 28.5 32.1 36.6 40.6 45 48.6 50.8 52.4 52.4 51.9 50.9 50.9 50.9 50.2 50
Dodge Horicon Wildlife Area ppb 30.3 27.5 25 23.2 21.4 20 19.1 19.3 21.3 24.5 28.3 32.7 37.6 42.6 47.3 50.8 52.9 53.7 53.9 53.2 52.2 50.8 49.4 47.9
Door Newport Park ppb 25.7 25.2 24.9 24.9 25 24.7 24.4 24.5 26.1 28.9 31 33.3 36.8 40.9 45.8 45.6 45.7 42.5 39.2 36.5 32.7 29.4 23.6 18.9
Eau Claire Eau Claire DOT Sign Shop ppb 17 12 7.4 4.4 3.3 3.2 3.9 6.3 9.8 13.9 18.2 22.5 27.1 31.3 34.1 34.9 34.9 34 32.2 30.1 26.4 22.7 19.3 16.4
Fond du Lac Fond Du Lac ppb 27.2 25 23.3 22.6 21.7 20.7 20.5 21.5 23.7 26.4 29.7 33.2 37.1 41.1 44.7 47.3 48.4 48.8 48.3 48.4 49.2 49.1 48.5 47.4
Forest Potawatomi ppb 20 19.7 20 20.7 20.9 20.9 21 21.9 23.1 25.2 27.7 29.8 31.9 34.5 36.1 36.8 37.9 37.6 36 34.7 33.9 32.7 32 31.7
Jefferson Jefferson-Laatsch ppb 24.2 21.2 18.4 16.7 16.1 15.6 15.5 16.9 18.7 18.5 23.9 29.4 35.4 41.5 46.2 48.8 50.4 50.1 49.8 49.2 49.2 49 48.6 48.4
Kenosha Chiwaukee Prairie ppb 24.6 20.9 16.9 14.2 13.2 13.7 14.6 17.3 20.4 25.1 30.8 36 41.5 46.3 51.6 55.8 58.5 59.7 60.2 59.6 58.1 56.4 55.8 54.5
Kenosha Kenosha-Water Tower ppb 34.1 31.5 29.4 27.2 24.8 23 22.4 22.6 22.1 26.7 31.1 36.2 42.1 48.2 52.8 56.6 57 58.4 59.1 58.7 57.2 55.6 54.6 53.6
Kewaunee Kewaunee ppb 25.1 24 23 22.2 21.6 21.1 20.4 20.1 21.9 25.2 28 31.3 35 39.3 43.2 46.6 47.6 47.1 47.1 46.2 44.8 43.4 41.9 40.3
La Crosse La Crosse DOT ppb 32.2 29.3 26.4 24 22.1 21.4 21.6 22.7 24.6 26.7 29.2 32 35.6 38.7 41.5 43.5 44.5 45 45.7 45.9 45.4 44.4 43 41.2
Manitowoc Manitowoc ppb 19.5 18.2 17.4 17.5 17.3 17.2 16.5 15.6 15.2 15.9 17.6 20.7 25.3 30.3 35.5 41.4 46.4 48 48.6 48.2 47.6 47.3 45.8 41.9
Marathon Lake Dubay ppb 27.4 25.2 23.6 21.5 19.5 18.4 18 18.4 20 22 24.8 27.5 30.3 32.7 34.6 36 35.1 36.1 36.9 36.6 36 35 34.5 33.8
Milwaukee Bayside ppb 21.5 17.4 13.2 10.4 9.9 10.8 12.4 14.6 18.4 23.6 29.4 35 39.9 43.9 47.7 50.7 52.4 52.6 52.1 51.4 50.8 50.9 49.9 48.8
Milwaukee Milwaukee-16th St. Health Center ppb 24.6 24.8 26 27.2 27.4 26.5 25.5 25.9 27.9 30.3 33.2 35.7 38.9 43.2 47.5 51 52.5 52.9 52.6 52 51.1 51.1 50.4 49.5
Outagamie Appleton ppb 25.8 23.5 21.8 20.9 20.2 19.8 20.1 21.8 23.6 26 28.7 32 35.5 39.5 43.3 45.5 46.1 45.5 44.6 43.6 43 42.2 41.5 41
Ozaukee Grafton ppb 35.9 32.4 29.2 25.9 22.7 20.5 18.9 19.2 21.6 25.6 29.7 33.7 37.9 42 46 48.8 50.3 50.7 50.5 50.1 50.4 50.5 50.2 49.6
Ozaukee Harrington Beach Park ppb 34.2 32.6 29.8 27.1 24 21.6 20 18.5 19.2 21.2 25.2 29.5 34.3 39.7 45.1 49.2 51 51.6 51.1 50.5 49.6 47.9 46.1 44
Racine Racine-Payne & Dolan ppb 35.4 33.4 31.3 30.2 30.6 30.4 30.4 30.6 32.1 34.2 37.6 40.5 42.7 44.4 47.6 51.1 53.1 54.7 55.4 56 56.3 57.4 57.3 56.8
Rock Beloit-Converse ppb 22 18.1 13.5 10.4 8.3 7 8 10.6 10.9 11.5 20.7 30.2 38.9 46.5 51.7 55.1 55 54.9 54.1 52.9 52.2 52.1 52.3 52.1
Sauk Devils Lake ppb 14.3 10.9 9.5 8.8 9.1 9.6 11.4 15.1 19.8 24 27.6 31.1 34.7 38.6 41.9 43.4 43.8 44.5 44.7 44 44.6 45.5 45.9 45.9
Sheboygan Sheboygan-Haven ppb 23.6 21.8 19.9 18.4 17.1 15.9 15.4 15.2 16.8 19.9 23.9 27.9 32.1 36.2 40.3 44 46 46.6 46.5 46.6 46.6 46.5 45.9 45.3
Sheboygan Sheboygan-Kohler Andrae ppb 28.1 27.1 25.1 23.1 22 21.4 21.4 20 20 21.2 25.3 30.7 37.9 46.1 54 57.1 62.9 66.1 68.4 67.7 65.3 62.2 58.6 54.3
Vilas Trout Lake ppb 29 28.5 28.6 28.7 29.2 29.4 29.3 29.3 29.9 31.3 32.6 34.5 36.2 37.9 38.6 37.3 34.6 32.3 29.9 25.8 21.1 15.8 12.2 10.2
Walworth Elkhorn ppb 31.9 30.5 28.7 29 29.4 29.5 29.1 29.3 30.3 31.9 34.9 37.4 40.1 43.7 46.9 49.7 51.3 51.9 51.7 51.1 50.9 50.7 50.8 50.3
Waukesha Waukesha-Cleveland Ave. ppb 31.8 29.6 28 27 25.8 24.6 23.4 23.8 25.6 28.3 31.3 34.4 38 42 46.1 48.9 50.2 50.4 50.2 49.7 49.3 48.8 47.7 46.5