-
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

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 13.5 9 5.4 4.4 4.2 4.1 4.7 6 8.1 10.2 13 15.8 19 22.1 24.7 26.8 27.7 28.1 27.4 25.3 23 21.4 20 18.8
Brown Green Bay UW ppb 39.5 39.1 37.4 35.5 33.9 32.4 31 29.5 28.6 27.8 28.2 29.6 31 31.8 32.9 33.6 33.8 34.2 34.4 33.2 31.4 30.4 29.4 28.5
Columbia Columbus ppb 47.9 46.6 45.9 45.3 43.2 41.4 40 38.8 37.3 35.9 34.4 33.1 32.4 32 32 32 32.2 32.1 30.8 29.9 29 28.1 26.4 24.6
Dane Madison East ppb 49.1 48.8 48.7 48.5 47.2 45.1 43.1 40.6 38.7 37 36.1 35.9 36.1 36.2 36.8 37.3 37.7 37.3 36.4 34.9 33.3 31.8 30 28
Dodge Horicon Wildlife Area ppb 46.2 44.9 43.7 42.7 42.2 41.5 41.1 40.3 39.5 38.4 37.3 36.4 35 34.1 33.9 33.7 33.4 32.8 32.2 31 30 28.7 26.9 24.4
Door Newport Park ppb 15.5 14.1 14.9 14.6 14.4 13 13.6 15.1 17 20.1 21.6 23.7 25.8 28.8 31.8 34.2 35.8 37.3 38.2 37.9 37.9 37.5 37.1 36.6
Eau Claire Eau Claire DOT Sign Shop ppb 13.9 11.5 9.2 6.9 5.6 5 5 5.8 6.9 9.1 12.7 16.2 20 24.3 28.4 31.7 34.3 35.7 35.5 34.3 30.8 26.4 22 17.6
Fond du Lac Fond Du Lac ppb 46.3 45.7 45.7 44.8 42.2 40.3 38.9 37.4 36.7 36.1 35.5 34.7 34.1 33.8 33.6 33.7 33.4 32.8 31.5 30.3 29.3 28.3 27.3 26.6
Forest Potawatomi ppb 30.4 29.2 28.9 28.3 27.4 25.9 24.5 23 21.8 21.8 21.7 21.7 21.8 22.5 23.4 24.4 25.1 25.1 24.4 23.8 23.6 23.3 22.8 22
Jefferson Jefferson-Laatsch ppb 48 47.6 47 46.6 45.1 43.4 41.2 39 37.8 36.8 35.9 34.8 33.9 33.6 33.7 33.8 33.7 33.5 32.4 30.7 28.9 27 24.7 22.5
Kenosha Chiwaukee Prairie ppb 52.9 51 48.4 47.4 46 44.1 41.6 39.1 37.4 35.7 35.4 35.8 37.6 40.1 42 44.3 47.2 50.2 52.1 51.3 47.7 43.9 40 36.4
Kenosha Kenosha-Water Tower ppb 52 50 48.3 47.2 45.8 43.7 41.4 38.9 36.2 33.3 30.9 30.6 31.2 32 33.9 36.2 39.8 43.8 46.8 47.6 47.9 47.6 45 42.3
Kewaunee Kewaunee ppb 39.6 39.2 38.7 38.6 37.8 35.9 34.3 33.2 32.3 31.5 31.3 31.2 32.1 34.1 36.4 38.6 40.4 41.9 42.6 42.6 42.1 41 39.9 38.6
La Crosse La Crosse DOT ppb 39.4 37.3 33.9 30.7 27.8 25.3 23.4 21.9 20.9 21.1 22.6 24.8 27.3 29.7 32.3 34.9 37.2 38.4 38.9 37.4 34.9 32.1 29 25.5
Manitowoc Manitowoc ppb 36.6 34.7 33.3 32.4 31 28.9 27.4 27.1 29.1 30.5 31 31.4 32.1 32.7 33.8 34.9 36 37.2 38.1 36.5 34.8 31.9 30.3 29.2
Marathon Lake Dubay ppb 33.6 30.6 27.6 26.3 24.7 22.9 21.5 20.4 20.1 20.6 21.1 21.4 22.2 23.7 24.8 26.2 27 27.3 26.6 26.4 26.1 26 25.7 24.7
Milwaukee Bayside ppb 46.8 45.3 43.7 42.4 41 38.8 37.5 36.4 36.2 36.3 37.4 38.6 39.6 40.8 42.1 43.2 44 44.5 44.5 43.7 42 39.2 34.9 30.8
Milwaukee Milwaukee-16th St. Health Center ppb 48.9 48.4 47.9 47.8 46.9 44.3 42.4 40.4 38.5 37.1 36.6 36.4 37 38.4 39.6 41.1 42.7 43.5 42.7 40.6 37.7 35.2 33.3 31.8
Outagamie Appleton ppb 40.6 39.8 38.2 35.8 33.1 30.9 28.2 26.1 24.6 24.2 24.4 25.2 26.1 26.6 27.6 28.4 29 28.5 27.3 25.9 24.2 22.3 20.4 18.3
Ozaukee Grafton ppb 48.5 47.7 46.3 45.1 42.9 40.6 38.9 37.6 37.1 37 37.9 39.1 40.5 41.9 43.2 44.5 45.7 46 45.9 45.4 43.7 40.7 36.8 32.6
Ozaukee Harrington Beach Park ppb 41.7 40 39 38 36.9 36.2 34.6 34.1 34.4 34.8 35.3 36.2 37.1 38.4 40.1 41.5 42.8 43.6 44 43.5 43.1 41.7 39.7 36.7
Racine Racine-Payne & Dolan ppb 56.8 55.6 53.9 52.5 50.8 48.4 44.6 40.3 36.2 32.9 32.5 32.7 33.2 34.8 37.6 41.5 45 48.3 48.8 48.4 47.1 44.8 42.2 39.3
Rock Beloit-Converse ppb 51.3 50.6 49.3 47.8 46.7 44.9 42.1 39.7 37.8 36.6 36.9 37.6 37.5 37.5 38.6 39.9 41.3 40.8 38.9 36.8 34.2 31.6 28.4 24.4
Sauk Devils Lake ppb 46 46.4 46.1 46 43.9 40.8 38 35.7 33.8 32.1 31.4 31.2 31.3 32 32.7 33.3 33.8 33.6 32.1 29.6 26.8 23.9 21 18.2
Sheboygan Sheboygan-Haven ppb 44.3 42.9 41.9 40.5 39.3 38 36.8 35.5 34.5 34.6 34.5 34.9 35.2 35.8 36.6 37.6 38.4 38.6 39 39.2 38.9 37.9 36.1 33.2
Sheboygan Sheboygan-Kohler Andrae ppb 49.6 46.1 41.5 39 36.9 34.8 32.7 31 30.6 31.2 32.7 34.2 36 37.9 40.1 42.1 43.3 44.2 44.8 45.5 45.9 45.8 44 40.9
Vilas Trout Lake ppb 9.4 8.1 6.9 7.9 9.2 10.9 12.1 13.1 14.5 16.4 18.6 20.3 22.4 24.7 27.4 28 29.6 30.2 30.1 28.7 26.5 23.6 20.8 18.1
Walworth Elkhorn ppb 50.1 50 50 49.6 48.4 46.6 44.3 42.4 40.1 38.4 37.4 37.1 37.1 37 36.7 36.8 36.8 36.1 34.6 32.7 29.9 27.9 26.2 24
Waukesha Waukesha-Cleveland Ave. ppb 45.3 44.4 43.5 42.7 41.5 40.5 39.5 38.4 37.4 36.9 36.7 36.8 36.7 36.2 35.8 35.6 35.3 34.6 32.9 30.6 28.2 26.2 23.4 21