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Noise monitoring program
Active Air Quality Notification
  • An air quality ADVISORY for Unhealthy for Sensitive Groups OZONE levels is in effect from 7/5/2025 08:00 to 7/5/2025 23:00 for these counties: Kenosha,Manitowoc,Milwaukee,Ozaukee,Racine,Sheboygan .

  • Increases in firework displays over the holiday weekend may lead to short-lived, local spikes in PM2.5 concentrations. Visit https://dnr.wisconsin.gov/topic/AirQuality/Fireworks.html to learn more about air quality and health effects of fireworks.

8-HR Ozone Summary

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Wednesday, 
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 19.4 17.6 16.3 15.3 14.5 13.7 13.8 13.9 13.9 14.8 15.9 17.7 20 22.7 24.7 26.7 28.3 29.6 30.9 31.7 31.7 31 29.7 27.3
Brown Green Bay UW ppb 24.9 23.4 22 20.9 19.7 18.6 18.6 19 19.6 21 22.9 25.2 27.9 30.3 31.4 31.3 30.2 29 26.8 25.4 24 22 20 18.9
Columbia Columbus ppb 33.5 30.6 28 26 24.4 23.1 22.7 23.1 23.9 25.5 27.3 28.4 29.7 31.3 32.4 32.9 33.5 33.8 33.6 33.8 33.5 33 31.5 29.6
Dane Madison East ppb 32.7 30.3 28.2 27 25.9 25.7 25.4 26.6 27.9 28.8 29.6 29.6 29.5 29.7 30.3 30 29.5 29.3 29.3 29.8 30.1 30 30 30.5
Dodge Horicon Wildlife Area ppb 34.6 32.6 30.3 28.4 26.5 25.2 24.2 24.2 24.7 25.7 27.4 28.9 31 32.6 33.8 34.8 35.5 36.1 36.3 36.1 35.3 34.1 32.5 30
Door Newport Park ppb 23.2 22.5 22.5 22.2 22.1 22.9 23.7 24.2 26.2 27.3 28.3 29.6 31 32 32.3 31.4 30.2 29.1 27.5 25.7 24.6 22.9 21.8 21
Eau Claire Eau Claire DOT Sign Shop ppb 28.5 26.3 24.6 23.9 24.4 24.8 25.5 27.5 27.5 26.9 26.6 26.7 26.6 27.3 27.3 28 29 30.4 31.1 30.8 29.7 28.1 27.3 24.6
Fond du Lac Fond Du Lac ppb 29.2 27.3 25.7 24.9 25 24.7 24.3 24.6 25.2 27.6 29.2 30.6 31.7 32.6 32.9 32.7 32.3 31.5 30.4 29.2 27.3
Forest Potawatomi ppb 27.4 26 25.2 23.9 22.3 21.7 21.6 21.3 21.4 22.3 23.2 24.8 26.4 27.3 27.8 28.5 29.4 29.5 28.5 27.8 27.1 25.5 23.8 22.3
Jefferson Jefferson-Laatsch ppb 35.6 32.2 29.4 27.3 25.7 24.7 24.3 24.9 25.9 27.4 28.9 30 31.3 31.9 32.3 32.1 31.9 31.9 31.8 31.9 31.9 31.7 30.4 28.6
Kenosha Chiwaukee Prairie ppb 33.8 33.8 33.9 34 35.4 35.3 35.2 35.5 36.5 37.7 39.1 40.7 41.3 41.2 41.6 41.6 41.7 42.2 42.3 41.7 42.2 43.2 43.3 42.7
Kenosha Kenosha-Water Tower ppb 31.7 30.7 30.6 30.7 30.8 30.6 29.9 29.9 31 32.8 34.1 35.8 37.4 37.8 38.2 38.7 38.9 39.3 39.4 38.8 38.4 39.4 40 39.2
Kewaunee Kewaunee ppb 26.1 25 23.7 23.3 23.1 23.2 24 24.7 25.8 27 28.8 30.5 32.3 33.8 34.9 35.9 36.3 36.6 36.5 35.9 35.4 35.1 33.9 32.1
La Crosse La Crosse DOT ppb 32.5 30.2 28.1 25.4 23.9 23.3 23.6 23.4 24.1 25 25.5 26.6 27.9 28.4 28.3 27.8 27.8 28 28.6 29.6 29.5 28.1 26.9 26.4
Manitowoc Manitowoc ppb 21.1 19.5 17.5 15.6 14.2 13.6 15.5 16.5 17.2 18.7 21.1 24.3 28 29.9 30.2 30.3 29.8 29.6 28.6 27.3 26 25 23.5 21.9
Marathon Lake Dubay ppb 27.9 26.4 24.5 23 21.3 19.8 19.6 19.8 20.2 21.1 23.5 25.3 27.3 28.7 29.4 30.5 31.1 30.7 29.7 28.3 27 26 24.8 22.7
Milwaukee Bayside ppb 28.9 26.9 25.5 24.5 24 23.8 23.7 23.9 25.1 27.1 28.9 30.4 31.8 33 34.5 36 37.6 38.9 39.3 39.7 39.7 38.3 35.7 32.7
Milwaukee Milwaukee-16th St. Health Center ppb 29.2 28.7 28.4 28 27.2 26.7 26.1 25.8 25.9 26.3 27.1 28.2 29.6 30.7 31.7 32.6 33.6 34.5 34.8 34.6 34.4 33.5 31.7 29.5
Milwaukee Milwaukee-UWM UPark ppb 31.9 31.4 30.8 29.9 29.4 29 28.4 27.9 28 28.6 29.4 30.5 31.7 32.8 34.5 36.3 38.2 40 40.8 41.4 41.6 40.9 38.6 35.8
Outagamie Appleton ppb 24.3 23.1 20.8 18.5 17.6 16.8 17.8 18.8 19.1 19.9 22.1 25.1 27.9 30.7 31.2 31 30.4 29.6 28.6 27 25 23 21.3 19.7
Ozaukee Grafton ppb 29.7 27.5 25.3 23.1 20.3 18.9 18.6 18.8 20.4 20.8 23.8 27.3 31.4 34 35.5 37.2 38.7 39 39.2 38.8 37.9 36 33.7 30.8
Ozaukee Harrington Beach Park ppb 27.6 26.3 24.8 22.9 20.8 20.3 20.3 21.2 22.5 24.2 26.4 29.5 33 34.3 35.7 37.4 38.5 38.9 38.7 38.1 36.6 34.7 32.3 29.4
Racine Racine-Payne & Dolan ppb 29.8 29.3 29 29.2 29.7 29.5 29.5 29.8 30.2 31 32 33.3 34.8 36.4 37.4 38.9 40.2 41.5 41.9 41.7 41.5 41.6 42 40.2
Rock Beloit-Converse ppb 41.1 36.8 33.2 31.5 30.4 29.4 29 29.8 31.6 33.6 34.8 34.3 33.7 34 33.6 33.1 31.9 31 31.2 32.4 33.3 34.3 35.4 35.7
Sauk Devils Lake ppb 29 26.5 24.4 23 22.8 23.3 23.6 24.8 26.4 28.4 30.3 31.3 31.5 31.7 31.7 31.6 31.4 30.7 30.2 30.5 30.1 28.6 26.4 24.2
Sheboygan Sheboygan-Haven ppb 23.4 21.5 19.9 17.8 15.8 14.1 15.9 17.4 19 20.7 22.6 25.7 29.3 32.9 33.8 34.9 35.6 36 35.6 34.2 32.1 30 28.3 25.8
Sheboygan Sheboygan-Kohler Andrae ppb 27.1 25.2 23.7 21 18.3 18.6 20 21.7 23.7 26.1 28.3 31.9 35.7 37.6 38.6 40.1 40.9 41 40.6 39.4 36.8 34 31.1 27.4
Vilas Trout Lake ppb 24.6 23 22 21.6 20.6 19.6 19.9 20.8 22.1 24.1 26.7 29.1 32.3 35.9 38.1 39.1 39.4 38.3 35.6 33.9 32.9 30.9 28.7 27.3
Walworth Elkhorn ppb 30.1 28.2 26.9 25.9 24.9 24.4 24.7 25.8 26.7 27.9 29.9 32.4 34.4 35.6 36 35.6 34.8 34.9 34.6 34.2 34.3 34.5 35 35
Waukesha Waukesha-Cleveland Ave. ppb 32.7 30.6 28.8 27.4 26.1 24.8 24.4 24.2 25.2 27 28.1 29.7 31.6 33.2 33.9 34.8 35 34.9 35.8 36 36 35.6 34.3 32.2