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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 32.5 36 37.3 37.1 36.2 34.4 33 31.7 30.2 27.7 26.3 25.8 26 26.8 27.6 28.1 28.5 28.4 27.8 27.5 27.1 26.5 25.8 25.2
Brown Green Bay UW ppb 37.7 37.3 38.3 39.2 40.4 41.6 41.8 41.5 42 41.8 40.6 39.7 38.8 38.2 38.5 38.9 38.6 38.1 37.1 35.9 34.4 33.2 32.4 31.4
Columbia Columbus ppb 44.8 42.6 40.6 39 38.1 38.2 38.1 37.4 37.3 37.3 38.1 39.3 39.9 39.4 39.2 39.6 39.7 39.6 38.7 36.9 34.6 32.8 31.1 29.1
Dane Madison East ppb 43.8 41.7 40.3 39.5 39.1 38.9 38.7 38.2 38.9 39.1 37.8 37.6 37.4 36.5 35.5 34.6 33.5 32.1
Dodge Horicon Wildlife Area ppb 46.9 45.1 43 40.8 39 37.6 37.3 36.7 36.4 36.7 37.3 38.2 39.1 39.8 39.7 39.8 40.1 39.7 39.5 38.6 37.2 35.9 34.4 32.8
Door Newport Park ppb 50.7 51.6 51.5 51.5 51.9 52.1 51.5 49.5 46.9 44.8 44 42.4 40.8 39.7 38.8 38.1 37.5 36.8 35.5 34 33 32.1 31 29.9
Eau Claire Eau Claire DOT Sign Shop ppb 43 42.2 41.3 38.7 35.9 32.7 29.6 27.8 26.9 26.4 26.4 27.2 28.4 29.9 31.7 32.3 32.4 32.5 32 31.1 29.7 28.3 26.2 24.4
Fond du Lac Fond Du Lac ppb 44.1 42.5 41.3 39.8 38.5 37.7 37 36.4 35.9 35.8 36.2 37.5 38.3 38.4 38.3 38.3 38.6 38.5 38.1 36.8 35.3 34.2 33 31.6
Forest Potawatomi ppb 37.8 38.8 40.5 42.4 43.9 44.8 43 41.3 39.9 38.8 37.7 36.3 34.7 33.4 32.5 31.8 31.2 30.7 30.6 30.4 30.1 29.4 28.5 27.5
Jefferson Jefferson-Laatsch ppb 44.9 43 41.2 39.1 38.2 38.1 37.8 37.5 37.4 37.6 38.4 39.9 40.4 40.2 40 40 40.1 40 39 36.5 33.6 30.4 27.5 25.5
Kenosha Chiwaukee Prairie ppb 44.6 42.9 41.2 40.1 39.2 37.5 36.1 35.5 35 34.6 34.7 34.7 35.7 37.7 39.7 41.4 42.8 45.2 46.1 45.1 42.3 38.9 35.1 31.7
Kenosha Kenosha-Water Tower ppb 43.2 41 39.4 38.3 37.1 35.8 34.8 35 35.2 35.3 34.6 34.8 36.2 38.1 40.1 41.2 42 42.8 43.6 42.4 39.5 35.7 31.1 26.6
Kewaunee Kewaunee ppb 47.7 45.5 43.8 43.8 42.4 41.1 39.6 39.2 39.9 40.9 42.3 42.2 42 41.7 41.6 41.8 41.8 41.3 39.9 37.9 35.7 33.7 31.9 30.2
La Crosse La Crosse DOT ppb 48.6 49.8 49.4 47.9 45.7 43 40.6 37.9 35.3 33.1 32.3 32.4 33.2 34 34.9 35.6 36.3 37.1 38.5 38.9 38.5 37.8 37 35.9
Manitowoc Manitowoc ppb 47.7 46.9 44.3 42.6 41.4 39.7 38.3 36.7 36.3 36.8 38.6 39.5 39.8 40.3 40.7 40.9 40.9 40.6 39.5 36.9 33.5 30.4 28.3 26.3
Marathon Lake Dubay ppb 39.2 40.9 42.2 42.4 41.2 38.5 37.1 35.9 35.3 34.6 33.9 33.2 33 33.6 34.2 34.4 34.2 34 33.7 33.1 32.4 31.4 30 28.5
Milwaukee Bayside ppb 45.1 42.6 40.5 38.7 37.7 36.7 36.2 36.2 36.4 36.7 37.5 38.9 40.5 42.1 42.8 42.7 42.6 42.3 41.3 39.3 36.4 33.6 30.7 28.3
Milwaukee Milwaukee-16th St. Health Center ppb 44.6 41.9 40 38.6 37.6 37 37.5 38.4 39.3 39.9 40.6 41.7 43.4 44.5 44.5 43.8 43.1 43.1 42.8 41.5 39.3 37.1 35 33.5
Outagamie Appleton ppb 46.1 46.2 46.1 46.2 46 44.5 42.4 40.8 40.1 38.9 37.6 36.3 35.1 34.9 35.4 35.9 36.1 35.6 34.4 33.1 32.1 30.8 29.2 27.4
Ozaukee Grafton ppb 48.3 45.5 43.1 41.2 39.2 37.8 37.6 37.7 37.8 37.9 38.4 39.4 40.7 42 41.8 41.3 41 40.6 39.4 37.4 34.9 32 29.9 28.3
Ozaukee Harrington Beach Park ppb 43.5 41.5 39.5 38.2 36.7 35 34.4 35.2 35.8 36.1 36.8 37.4 38.5 40.2 40.8 40.2 39.9 39.6 38.8 37.4 35.6 33.4 31.8 30.3
Racine Racine-Payne & Dolan ppb 46.5 44.3 42.4 40.9 39.6 38.6 37.5 37.2 37.2 37.1 36.9 37.1 38 39.2 40.7 42.3 44.3 46.3 48.3 49.6 48.9 47.1 44.9 41.6
Rock Beloit-Converse ppb 43.4 41.3 39.3 38.2 38.3 37.8 37.2 36.8 36.3 36.4 37.2 38 37.6 37.8 38.1 38.3 38.8 38.7 37.5 35 31.8 28.7 26.1 23.8
Sauk Devils Lake ppb 40.3 40.8 41.6 42 41.7 41.3 40.6 40.8 41.1 40.2 38.4 37.1 36.3 35.8 36.1 36.8 37 36.8 36.5 34.8 33.3 32.8 31.5 30
Sheboygan Sheboygan-Haven ppb 40 38.5 36.9 36 34.4 33.5 33.5 33.1 33.4 33.9 34.4 35 36.5 37.5 37.7 38.2 38.3 38.4 38 37.1 35.5 33.5 32 30
Sheboygan Sheboygan-Kohler Andrae ppb 53.3 50.2 47.4 44.8 42 39.4 36.6 35 34.1 33.8 33.9 34.3 35.1 36.6 38.3 39.3 39.7 39.7 39.2 37.4 35.3 32.3 29.6 27.7
Vilas Trout Lake ppb 29.4 29.6 29.7 29.9 30.2 30.4 30.5 30.3 29.7 28.6 27.7 26.6
Walworth Elkhorn ppb 40.9 39.3 37.8 36.5 35.7 35.6 36 36.7 37 37.1 37.5 38.6 39.6 40 40.4 40.3 40.5 41 40.9 39.9 38.2 36.4 34 31.9
Waukesha Waukesha-Cleveland Ave. ppb 43.6 41.2 39.1 37 35.5 34.9 34.9 35.2 35.3 35.6 36.2 37.5 39.1 40.5 41.3 41.2 41.9 42.4 42.3 41.2 39.3 37.1 35 33.1