-
Noise monitoring program
Active Air Quality Notification
  • An air quality ADVISORY for Unhealthy PM2.5 levels is in effect from 7/12/2025 00:00 to 7/14/2025 12:00 for these counties: Adams,Ashland,Barron,Bayfield,Brown,Buffalo,Burnett,Calumet,Chippewa,Clark,Columbia,Crawford,Dane,Dodge,Door,Douglas,Dunn,Eau Claire,Florence,Fond du Lac,Forest,Grant,Green,Green Lake,Iowa,Iron,Jackson,Jefferson,Juneau,Kenosha,Kewaunee,La Crosse,Lafayette,Langlade,Lincoln,Manitowoc,Marathon,Marinette,Marquette,Menominee,Milwaukee,Monroe,Oconto,Oneida,Outagamie,Ozaukee,Pierce,Pepin,Polk,Portage,Price,Racine,Richland,Rock,Rusk,Sauk,Sawyer,Shawano,Sheboygan,St. Croix,Taylor,Trempealeau,Vernon,Vilas,Walworth,Washburn,Washington,Waukesha,Waupaca,Waushara,Winnebago,Wood .

8-HR Ozone Summary

Filter by County:
Filter by Site:
Tuesday, 
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 20 18.6 17.1 15.3 14.4 13.8 14.3 15.5 16.5 16.8 17.7 18.9 19.5 20.5 20.9 21 20.6 20.9 20.8 20.7 20.6 20.1 19.5 18.6
Brown Green Bay UW ppb 26.3 26 26 26 25.5 24.5 23.3 22.2 21.6 21.3 21.3 21.8 23.1 25.2 27.9 30.9 33.4 36.2 39.1 41.8 44.1 45.7 46.4 46.3
Columbia Columbus ppb 23.1 20.6 18.4 16.2 14.4 13.7 12.5 13 14.5 16.4 19.1 23 27.6 32.5 38.7 44 49 52.4 54.3 55.7 55.9 55 52.6 49.1
Dane Madison East ppb 29.2 26.6 24.2 22 19.9 18 16.4 15.8 16.1 17.6 20.9 25 29.8 35.7 42.2 47.8 53.1 57.2 59.1 59.7 58.8 56.6 53.1 49.3
Dodge Horicon Wildlife Area ppb 37.5 39.9 41.6 45.9 50.7 55 57.8 58.7 57.7 56.5 55.2 53.3
Door Newport Park ppb 27.4 27.2 27.1 27.4 28.2 28.6 29.5 30.1 30.4 30.5 30.2 29.8 30 30.3 29.9 29.9 29.8 29.4 29.1 28.6 27.4 26.5 26 25.4
Eau Claire Eau Claire DOT Sign Shop ppb 20.7 20.4 20.5 20.9 21.5 22.2 22.9 23.8 24.7 26.3 28.5 30.8 33.5 36.3 39.4 42.2 44.7 46.3 46.8 46.3 44.7 43.6 41.6 38.4
Fond du Lac Fond Du Lac ppb 24.3 23.6 23 22.5 21.6 20.8 19.9 19.3 19.1 19.5 20.9 22.5 24.6 27.3 30.4 33.7 36.8 38.9 40.1 41.1 42 42.2 41.5 40.1
Forest Potawatomi ppb 23.5 22.9 22.4 21.6 21 20.8 20.6 20.1 20.2 20.7 21.5 22.4 23.2 22.7 21.6 20.9 20.4 20.1 19.8 19.9 20.5 22 24.3 27
Jefferson Jefferson-Laatsch ppb 25.9 22 18.8 15.7 12.9 10.2 8.9 9.2 10.4 12.5 16.2 21.3 26.8 32.9 38.6 44 48.9 52.5 54.5 55.1 54.9 53.1 50 45.5
Kenosha Chiwaukee Prairie ppb 33.1 33 32.6 31.7 30.9 30.1 29.2 28.1 27.1 26.9 27.7 29.8 32.7 35.7 38.9 42.1 45 47.4 49.1 49.7 49.8 50.2 49.7 47.6
Kenosha Kenosha-Water Tower ppb 27.5 27.2 27 26.4 25 23.3 22.4 21.7 21.5 21.8 22.9 25.1 28.9 33.3 37.2 41.4 44.8 47.8 50.1 51.3 51.6 51.7 50.5 47.5
Kewaunee Kewaunee ppb 31.8 31.5 30.6 29.9 28.8 27.7 27 26.3 25.5 25.1 25.2 25.8 27.5 29.3 31.1 32.3 33.4 34.6 35.5 36.2 36.7 36.5 36.1 36.2
La Crosse La Crosse DOT ppb 34.1 33.6 33.1 33.1 32.5 31.7 30.9 30.1 29.7 30.2 31.2 33.3 36.1 39.1 42.3 45.6 48.4 50.5 52.1 51.9 51.4 50.3 48.4 46.1
Manitowoc Manitowoc ppb 28 27.1 25.6 24.1 23.3 22.7 22.2 21.8 21.8 22.7 24 26 27.9 29.5 31.2 33.3 35.8 38.4 41 43.6 45.5 46.4 46.5 45.8
Marathon Lake Dubay ppb 23.5 23.6 23.8 23.8 23.8 23.7 23.3 23 22.9 23.2 24.4 26.4 28.8 31.5 35.2 39.8 44.4 47.7 49.7 50.8 51.4 50.8 48.7 45.4
Milwaukee Bayside ppb 28.2 27.8 26.8 25.5 24.4 23.4 23.1 22.9 22.5 22.2 24.2 27.3 30.2 33.4 36.8 40.3 41.5 42.4 44.2 45.6 46.5 47.1 47.3 46.1
Milwaukee Milwaukee-16th St. Health Center ppb 25.1 24.9 24.5 24.5 23.8 22.5 21.2 20.8 20.8 21.8 23 24.2 26.3 28.8 31.8 34.4 36.5 37.6 39.2 40.2 40.1 39.6 39 38.2
Milwaukee Milwaukee-UWM UPark ppb 30.8 30.3 29.2 28 26.8 25.4 24.3 23.9 23.8 24.3 25.8 27.8 29.9 32.4 35.2 37.8 40.4 42.8 44.6 46 47 47.6 47.5 46.5
Outagamie Appleton ppb 23.7 23.6 22.8 22.3 21.9 21.4 20.8 19.8 18.9 18.5 19.1 20.1 21.7 23.9 26.7 30 33.2 35.8 37.6 38.9 40.1 40.6 40.8 40.3
Ozaukee Grafton ppb 25.7 25.2 24.6 23.6 23.5 23.8 24.2 24.4 24.8 25.5 27 29.1 31.2 33.3 35.4 37.9 40.7 43.2 45 46.4 47.2 47.9 48.1 47.4
Ozaukee Harrington Beach Park ppb 27.4 26.8 26 24.9 24.9 25.3 25.6 25.7 26.1 26.7 27.9 30 31.9 33.9 36.1 38.1 40.3 42.3 44.1 45.4 46.1 46.3 46.5 47.1
Racine Racine-Payne & Dolan ppb 30.6 30.3 29 28 27.4 26.5 25.7 25.1 25.1 25.8 27.6 29.9 31.9 34.6 37.4 40 42.6 44.8 46.5 47.5 48.6 49.3 49.3 48.8
Rock Beloit-Converse ppb 31.4 27 23.3 20.6 18.1 15.4 13.7 13.2 14.3 17.4 21.7 27 33.3 40.7 47.8 54.4 59.3 62 62.8 62.2 60.1 57.2 53.9 49.8
Sauk Devils Lake ppb 31.7 29.8 28.5 26.8 25.4 24.8 24.5 24.6 25.1 25.4 25.6 30.3 35.4 40.4 45.2 50.1 54.6 54.7 54.8 54.9 54.4 53.7 52.5 50.6
Sheboygan Sheboygan-Haven ppb 27.6 26.8 25.7 24.5 23.3 22.4 21.8 21.6 21.8 22.4 23.7 25.6 28.2 30.9 33.6 36.2 38.9 41.3 43.3 45 46.1 46.3 46.2 45.9
Sheboygan Sheboygan-Kohler Andrae ppb 28 27.4 26.6 26.3 25.9 25.5 25.6 26 26.8 27.8 29.3 30.8 31.8 32.8 35.6 38.7 41.8 44.8 46.9 48.7 48.5 48.1 48.1 47.4
Vilas Trout Lake ppb 21.3 20.7 20.5 20.3 20 19.6 19.6 19.9 20.9 22.1 23.2 23.8 24.2 24.5 24.2 23.8 23.1 22 21 20.7 20.8 21 21.6 22.7
Walworth Elkhorn ppb 21.1 19 17.2 16 15.3 15.6 38.6 42.7 47.3 54.2 58.8 60.9 61.5 60.6 58.5 54.1 48.2
Waukesha Waukesha-Cleveland Ave. ppb 25.9 25 24.1 23.8 23.5 20.9 19.8 19.3 19 20.2 23.4 26.5 29.5 34.9 39.6 44 48.2 51.4 53.1 53.7 53.3 52.2 50.6 48.2