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Noise monitoring program
Active Air Quality Notification
  • An air quality ADVISORY for Unhealthy OZONE levels is in effect from 7/14/2025 15:00 to 7/14/2025 23:00 for these counties: Kenosha,Racine,Milwaukee,Ozaukee,Sheboygan .
  • An air quality ADVISORY for Unhealthy PM2.5 levels is in effect from 7/14/2025 10:00 to 7/14/2025 18:00 for these counties: Ashland,Bayfield,Burnett,Douglas,Iron,Sawyer,Vilas,Washburn .

8-HR Ozone Summary

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Friday, 
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
Brown Green Bay UW ppb 33.2 31.3 30 30.1 30.4 29.7 29.4 29.8 30.1 32.1 34 35.7 37 39.2 40.9 41.6 42.1 41.6 40.7 39.1 38.2 37.7 36.5 35.2
Columbia Columbus ppb 38.1 36.6 35.5 34.6 34 33.5 33.1 32.8 32.6 32.5 32.6 34.2 35.9 38.1 40.6 43.1 45.2 47.1 48.5 48.3 47.2 45.5 43.5 41.1
Dane Madison East ppb 37.6 36.3 35 33.8 33.2 32.6 31.3 30.5 29.8 29.6 29.6 30.5 32.1 34.6 37.5 40.2 42.8 44.7 46.4 47.2 46.6 45.2 43.2 40.6
Dodge Horicon Wildlife Area ppb 40.7 39.6 38.7 38.5 38 37.2 35.9 34.8 33.8 33.8 34.8 35.8 37.5 39.9 42.6 45.2 47.4 48.7 48.8 48.3 46.4 44.2 41.9 39.5
Door Newport Park ppb 40.8 40.8 41.3 41.9 42 41.9 42 41.6 41.2 40.6 40 39.6 39.6 40 40.7 41.2 41.6 42.2 42.9 43.5 44.3 44.9 45.1 45.1
Eau Claire Eau Claire DOT Sign Shop ppb 35.8 31.3 28.3 27.7 26.8 26 25.9 27 29.7 33.1 35.5 36.8 40.5 44.7 48.5 50.7 52.1 52.9 53.1 52.3 49.5 46 41.8 37.4
Fond du Lac Fond Du Lac ppb 37.8 36.9 36.5 35.8 35.1 34.4 33.8 32.7 31.9 32.3 33.3 35.3 37.5 39.9 42.1 44.7 47.1 48 48.3 47 45.3 43.3 41.4 39.6
Forest Potawatomi ppb 48.7 47.6 46.6 45.6 44.4 43.1 41.9 40.9 40.8 41.1 41.9 43.3 45.1 47.1 49.3 51 51.5 51.4 51 50.3 49.5 48.5 47.3 46.1
Jefferson Jefferson-Laatsch ppb 39.3 38.4 37 36.2 35.9 35.4 34.7 34.1 33.5 33 33.5 34.5 35.6 37.6 40.2 42.5 44.7 46.7 47.7 46.9 46.7 45.1 42.9 40
Kenosha Chiwaukee Prairie ppb 42.5 43.2 43.6 43.7 43.5 43 41.9 40.2 38.5 37.1 36 35.9 36.1 36 36.9 38.2 40.2 42.2 43.8 44.3 44.5 45 44.8 44.8
Kenosha Kenosha-Water Tower ppb 42.1 42.1 42 42.1 41.4 40.9 40 38.2 36.4 34.9 34.1 34.3 34.8 34.8 35.5 36.7 38.5 40.6 41.8 42.2 42.4 42.5 42.3 42.3
Kewaunee Kewaunee ppb 39.7 39.7 39.8 40.1 40.2 40.6 41.3 41.9 42 42.1 42.3 42.4 42.4 42.6 42.8 43.1 43.6 44 44.1 44.1 44.2 44.3 44.4 44.7
La Crosse La Crosse DOT ppb 46.5 45 42.6 40.2 38.2 35.7 33.4 32.3 31.8 32.3 33.8 36.1 38.3 40.9 43.7 45.7 47.5 48.8 49.8 49.6 48.7 48.4 47.2 46.3
Manitowoc Manitowoc ppb 34.6 34.1 34.2 34.8 35.9 36.5 36.9 37.5 38.2 38.2 38.3 38.9 40.2 41.6 43 44.1 44.7 45 45.1 44.6 44 43.1 41.6 40.1
Marathon Lake Dubay ppb 48.8 46.6 44.2 41.9 39.6 37.5 36.3 35.9 36.1 37.2 38.5 40.3 42.6 45.2 47.4 49.4 50.9 51.9 52.2 52.1 51.7 50.7 49.5 48
Milwaukee Bayside ppb 40.7 40.9 41.1 41.1 40.8 40.2 39.4 38.6 37.9 37.2 36.6 36.5 36.7 37.7 39.1 40.8 42.6 44 45.4 45.8 45.7 45.3 44.4 43.5
Milwaukee Milwaukee-16th St. Health Center ppb 28.8 30.2 32.3 34.9 35 34.9 33.9 32.1 30.4 28.9 27.6 27 27.9 29.2 31.1 33.6 36.1 38.2 39.7 40.5 40.7 40.3 39.4 38.7
Milwaukee Milwaukee-UWM UPark ppb 41.1 41.5 41.8 41.7 41.4 40.8 39.9 38.8 37.8 36.9 36.1 35.9 36.2 37.1 38.7 40.6 42.5 44.1 45.4 46.1 46.3 46 45.3 44.3
Outagamie Appleton ppb 35.8 34.2 33 32.9 32.7 32.7 32.8 33.2 33.9 34.5 35.3 36.5 38.5 40.8 42.9 44.9 46.2 47 47 46.2 44.9 43.1 41.5 39.8
Ozaukee Grafton ppb 40.1 39.3 38.6 38 37.4 37.2 36.6 36.1 35.8 35.7 35.3 35.6 36.5 37.9 39.9 42 44 45.5 46.4 46.5 46.2 45 43.7 42.6
Ozaukee Harrington Beach Park ppb 36.7 36.2 36.2 35.9 35.6 36 36.3 36.7 37.1 37 36.7 36.9 37.7 39.1 40.7 42.4 44 45.2 45.5 45.3 44.6 43.7 42.8 41.7
Racine Racine-Payne & Dolan ppb 40.4 40.9 41.3 41.4 41.1 40.3 39.1 37.6 36.1 34.9 33.8 33 32.8 33.5 34.9 36.8 38.9 40.6 41.7 42.7 43.5 43.6 43.2 42.5
Rock Beloit-Converse ppb 34.8 34.2 33.4 33.2 33.3 33.7 33.8 33.9 33.6 33.2 32.8 33 33.9 35 35.9 37.2 39 40.8 42.4 43.4 43.4 42.5 41.7 40.6
Sauk Devils Lake ppb 44.4 42.6 41.1 39.9 38.3 37 36.1 35 34.2 34 33.9 34.8 36.8 39.4 41.9 44.7 47.3 49.4 51.2 52.3 52.5 51.7 50.2 47.8
Sheboygan Sheboygan-Haven ppb 37.3 36.6 36.3 36 36.2 36.7 36.5 36.9 36.9 36.9 36.9 37.5 38.5 40 41.6 43.2 44.7 45.2 45.3 44.6 43.8 43 42.1 41.5
Sheboygan Sheboygan-Kohler Andrae ppb 37.6 37.8 37.4 37.1 36.8 37 37.2 36.8 36 35.5 35.5 35.9 36.8 38.2 39.8 41.4 42.8 43.6 44.1 44.1 43.7 43.1 42.1 41
Vilas Trout Lake ppb 39.8 38.5 37.2 35.8 33.6 30.9 28.8 28.4 29.7 31.9 34.9 37.9 41.4 45.5 49.1 51 51.6 51.6 51.2 50.8 50 48.7 47.4 46
Walworth Elkhorn ppb 35.3 34.9 35.1 35.7 35.9 36.5 36.3 36 35.1 34 33.2 33.3 33.9 34.4 35.7 37.5 39.6 41.9 43.4 44 44.3 44.4 43.4 42.1
Waukesha Waukesha-Cleveland Ave. ppb 36.6 36.8 36.8 37.2 37.9 36.9 35.5 34.2 33.2 32.6 32.5 32.5 33.2 34.9 37 39.5 41.9 44.1 46.1 47.1 47 46.1 44.7 43