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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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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 17.1 19.2 21.9 24.7 27.1 28.7 28.3 27.6 27.3 27.2 27.4 27.9 28.3 29 29.8 31 31.5 31.9 32.1 32 31.9 31.7 31.3 30.7
Brown Green Bay UW ppb 26.9 26.8 26.8 26.5 26.5 25.5 24.4 23.5 23.2 23.8 24.4 25.4 26.3 27.9 29.9 31.7 33.1 33.3 33.6 33.3 33.1 32.7 32.2 31.7
Columbia Columbus ppb 19.5 18.7 18 17.4 17.5 16.4 15.4 14.9 15 16.2 18.2 21.1 23.3 26.9 30.5 33.3 35.5 36.7 37.1 36.7 35.8 34.7 33.3 31.8
Dane Madison East ppb 19.8 18.6 17.5 16.5 16.2 16.5 15.8 15.6 15.6 16.8 19.3 22.7 24.8 27.9 30.9 33.5 35.9 37.2 37.7 37.4 36.6 35.6 34.5 33.6
Dodge Horicon Wildlife Area ppb 17.7 16.9 16.4 15.6 15.2 14.6 14.1 14 14.8 16.6 18.8 21.9 23.9 27 30.2 32.9 34.9 36 36.9 37.2 37 36.6 36.1 35.5
Door Newport Park ppb 30.7 30.6 30.4 30.1 29.9 29.5 29.1 28.7 28.3 28.1 28.2 28.4 28.5 28.6 28.8 29 28.9 28.8 28.4 27.9 27.4 26.9 26.3 25.9
Eau Claire Eau Claire DOT Sign Shop ppb 17 15.9 14.4 13.3 12.9 12 10.8 10.2 10.6 11.8 13.7 15.9 17.8 21 24.6 27.5 29.4 30.2 30.4 30.2 29.2 27.3 25.5 24
Fond du Lac Fond Du Lac ppb 17.8 17.5 17.1 16.8 16.9 15.8 14.7 14 14.7 15.9 17.6 20.3 22.1 25.5 28.9 31.9 33.6 34.9 35.8 36 35.9 35 34.2 33.1
Forest Potawatomi ppb 25.7 25.4 24.7 24.1 23.6 23.3 23.1 22.9 22.8 23.5 24.5 25.7 27.1 28.4 29.4 30.2 30.5 30.1 29.7 28.9 28.1 27.1 26.2 25.3
Jefferson Jefferson-Laatsch ppb 15.2 14.8 14.9 15 14.8 13.8 12.9 12.6 13 13.6 15.2 18.1 21.9 26 30 33.3 35.4 36.6 36.3 35.3 34.1 32.5 31.1 29.6
Kenosha Chiwaukee Prairie ppb 15.7 15.1 14.7 14.8 14.7 15 14.9 15.4 16.4 17.3 18.4 20.1 21.8 24.5 28.1 31.3 33.9 36.1 37.2 37.5 37 35.9 33.9 31.4
Kenosha Kenosha-Water Tower ppb 10.5 9.8 9.4 10.2 10.6 11.4 11.4 12.1 12.8 14 15.8 17.7 19.6 22.9 27.2 30.7 33.4 35.2 35.7 35.3 33.9 32.5 30.5 28.5
Kewaunee Kewaunee ppb 24.4 24.6 24.5 24.2 24.3 23.4 22.1 21.7 22.1 23 24.3 25.8 26.6 28.3 30.2 31.7 32.7 32.9 32.8 32.2 31.7 30.7 29.7 28.7
La Crosse La Crosse DOT ppb 19.5 16.9 15.3 14.5 14.6 13.7 11.8 11 11.6 13.9 16.4 19.2 21 23.8 27.4 30.5 32.3 33.3 33.6 33.4 31.9 29.4 26.8 24.5
Manitowoc Manitowoc ppb 19.4 19.5 19.4 19.3 19.5 19.1 18.6 18.8 19.4 20.5 22.2 24.3 25.6 28 30.4 32.2 33.4 34.2 34.5 34 33 31.6 30.1 28.4
Marathon Lake Dubay ppb 19.8 19.3 19 18.5 18.1 17.7 17.3 17.6 18.4 19.6 20.8 22.5 23.7 26.1 28.6 31 32.7 34 34.9 35.3 35.1 34.6 33.8 32.7
Milwaukee Bayside ppb 17.4 17.1 16.9 16.8 17 16.7 16.1 16 15.9 16.6 17.8 19.8 21.3 24.4 27.8 30.6 32.3 33 33.7 33.9 33.8 33.4 32.6 31.9
Milwaukee Milwaukee-16th St. Health Center ppb 14.5 14.8 15.6 16.1 16.5 16 14.9 15.1 15.1 15.8 16.9 19.3 21 24.2 28.2 30.9 33 34 34.3 34.2 34.2 33.5 32.9 32.4
Milwaukee Milwaukee-UWM UPark ppb 14.6 14.4 14.7 15.6 16.7 16.4 16.2 15.8 15.9 16.6 17.8 19.6 21.5 25.5 29.7 33 35 35.8 36.2 36.5 36.5 36.2 35.5 34.8
Outagamie Appleton ppb 17.9 17.6 17.4 16.9 16.9 16.2 15.4 15.5 16.3 17.5 19.3 21.6 23.1 26.1 28.8 30.7 32 32.7 32.8 32.9 32.2 31.2 30 28.7
Ozaukee Grafton ppb 18.7 18.4 18.6 18.5 18.8 18.2 17.6 17.1 17.4 18.3 19.9 22 23.7 27.2 30.5 33 34.3 34.9 35.4 36 36.1 35.5 34.8 34.2
Ozaukee Harrington Beach Park ppb 21.3 20.9 21.1 21.5 21.8 21.3 20.3 19.4 19.5 20.6 22 23.5 25.4 28.7 32 35 36.8 37.8 38.4 39 38.7 37.9 36.6 35.1
Racine Racine-Payne & Dolan ppb 15.3 14.9 15 15.4 15.4 15.6 15.5 15.6 16.1 16.9 17.9 19.3 20.7 23 25.9 28.8 31.1 32.6 33.1 33.1 32.7 31.8 30.6 29.5
Rock Beloit-Converse ppb 18.8 17.4 16 14.6 13.5 13.7 14.1 14.9 15.4 16.2 17.4 19.8 22 23 26.9 30.5 33.6 35.8 35.8 34.4 32.3 31.5 29.9 27.9
Sauk Devils Lake ppb 17.1 15.2 14.4 14 13.7 13.3 13.3 13.4 13.8 15.8 18.7 21.9 23.8 26.7 29.2 32 34.6 36.4 36.9 36.8 36.4 35.8 35.1 34.2
Sheboygan Sheboygan-Haven ppb 19.6 19.5 19.9 20.2 20.4 19.8 18.7 18.6 19.6 21.1 22.7 24.4 25.8 28.3 31.4 33.5 34.6 35.3 35.7 35.8 35.3 34.3 32.8 31.3
Sheboygan Sheboygan-Kohler Andrae ppb 15.5 15.3 15.3 15.5 16 16 14.9 14.4 15 15.8 16.4 17.4 17.8 18.8 20.7 22.6 23 23 23.4 23.5 24 23.8 23.1 22.2
Vilas Trout Lake ppb 22.1 22.2 22.6 23 23.2 23.9 24.2 25 25.6 26 26.7 27.5 28 28.6 29.5 30.5 31.4 32 31.9 31.4 30.8 30.1 29.5 28.8
Walworth Elkhorn ppb 18.1 17.1 16.6 15.9 16 15 13.6 13.5 14.3 15.6 17.2 19.8 21.9 25.4 29.3 32.4 35.1 36.7 37.3 37.4 36.8 35.4 33.1 30.6
Waukesha Waukesha-Cleveland Ave. ppb 13.7 13.1 13.6 14.4 15.7 16.8 16.3 15.8 16.1 17.4 19.1 21.4 23.4 27 31 34.2 36.8 38 38.6 39 39.2 39 38.2 37.2