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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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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 16.7 15.9 15.9 15.8 16.6 17.8 19.1 20.2 21.1 22.4 23.2 23.8 24.2 24.7 25.2 25.5 25.8 25.8 25.6 25.3 24.1 22.1 20 18.4
Brown Green Bay UW ppb 28.4 26.7 25.6 25.1 24.4 24 23.4 23.5 23.8 24.3 24.8 25.6 26.7 27.8 29.8 31.2 32.4 33.4 34.2 34.4 34.5 34.6 34 33.2
Columbia Columbus ppb 29.3 28.1 27.1 26 24.1 22.2 21.1 20.9 21 21.6 22.5 24.6 27.1 30 32.2 33.5 34.7 35.6 36.1 35.6 35.2 34.6 34.1 33.4
Dane Madison East ppb 27.7 26.5 25 23.4 21.8 21.1 20.6 20.2 19.4 20.2 21.9 24.8 27.9 30.8 32.4 33.7 34.4 35.6 35.9 35.6 35.5 35.3 35.1 34.6
Dodge Horicon Wildlife Area ppb 31 29.5 28.5 27 25.4 23.9 22.3 20.7 19.8 20.1 20.5 21.8 24.1 26.6 29.4 32.1 34 35.2 35.8 36.2 35.7 35.1 34.3 33.6
Door Newport Park ppb 24.3 24.6 24.9 24.4 22.2 20.9 20.2 19.8 19.8 19.8 20.6 21.5 22.6 24.3 26.1 27.8 29 30.2 30.7 30.8 31.2 30.9 30.2 29.3
Eau Claire Eau Claire DOT Sign Shop ppb 19.8 20.5 21 21.5 22 22.8 23.7 24.7 25.7 26.7 27.5 28.2 28.8 28.9 28.9 28.9 28.8 28.4 28.1 27.8 27.3 27 26.7 26.4
Fond du Lac Fond Du Lac ppb 30.5 29.9 29.3 28.6 27.7 26.6 25.6 24.7 24.2 23.8 23.9 24.2 25.1 27.1 29.2 31.1 32.6 33.9 34.5 34.9 34.8 33.7 32.7 31.8
Forest Potawatomi ppb 24.2 21.9 20 18.9 18.1 17.8 18.2 18.6 19.5 20.6 21.3 22.1 28.8 28.3 27.7 27 26.2
Jefferson Jefferson-Laatsch ppb 21.2 19.1 17.3 16.7 16.1 16.2 16.3 16.6 17.9 18.8 20.2 21.7 24.2 27 30 32.5 34 35.4 36.4 36.2 35.6 35 34.2 33.1
Kenosha Chiwaukee Prairie ppb 33.3 31.4 29.8 28.3 26.8 25.8 24.8 23.6 22.9 22.2 23.6 24.7 26.2 28.5 31.5 34.3 36.7 38.8 38.9 39.1 38.3 37.2 36 34.9
Kenosha Kenosha-Water Tower ppb 29.6 28.1 26.8 25.7 24.7 23.7 22.7 21.4 20.5 20 20.4 22 23.7 26.4 29.4 32.1 34.4 36.2 37.5 36.8 36.3 35.1 33.9 32.8
Kewaunee Kewaunee ppb 28.1 27.2 25.6 24.5 23.8 23.1 22.7 22.6 22.8 23.2 23.8 24.4 25.3 26.6 27.8 29.3 30.9 32.2 32.8 33.3 33.5 33.3 33.2 32.7
La Crosse La Crosse DOT ppb 27.3 26.6 25.9 25.2 25.2 25.4 25.8 27.2 28.9 30.2 31.6 32.5 33.1 33.5 34 33.8 33.4 33.1 32.3 31.6 31 30.3 29.5 28.5
Manitowoc Manitowoc ppb 29.4 28.1 26.8 25.8 24.3 23 21.9 21.3 21 21 21.2 21.8 23.1 24.4 25.8 27.8 29.4 30.5 31.4 31.5 31.7 31.7 31.5 30.5
Marathon Lake Dubay ppb 20.2 19.8 19.3 19.3 19.5 19.7 20 20.9 22.2 23.8 25.5 26.8 28.1 29.4 30.5 30.8 30.4 29.8 29.3 28.6 27.8 27 26.3 25.8
Milwaukee Bayside ppb 28.4 24.6 21.4 18.2 15.9 14.5 13.6 13.3 13.7 14.7 15.9 18.5 20.7 23 25.8 28.3 30.9 33.4 35.3 36.1 36.2 35.8 35.2 34.8
Milwaukee Milwaukee-16th St. Health Center ppb 25.6 23.2 21.1 19.1 18 17.3 16.8 16.4 16.6 16.9 18.2 20.2 21.8 24.3 27.1 29.7 31.9 33.6 34.4 34.5 34.6 34 33.2 32.9
Milwaukee Milwaukee-UWM UPark ppb 27 22.8 19.2 16.8 14.9 14 13.7 13.6 14.1 15.9 18.3 20.3 22.4 24.8 27.7 30.3 32.9 34.9 36.1 36.5 36.4 36.1 35.3 35
Outagamie Appleton ppb 28.3 27.3 26.7 26.1 25.7 25.1 24.5 24.4 24.6 24.9 25.5 26.2 27.1 28.9 30.4 31.8 32.7 33.4 33.5 33.6 33.5 32.8 31.9 30.9
Ozaukee Grafton ppb 31.1 29.5 28.2 26.3 24.4 23.4 22.3 21.3 20.3 19.4 19.2 20.3 21.8 23.7 26.1 28.5 30.6 32.6 33.8 34.2 34.4 34 33.4 32.8
Ozaukee Harrington Beach Park ppb 32.3 30.8 29.5 28.4 27.3 26.2 25.1 24.2 23.9 23 22.9 23.5 24.3 25.6 27.8 29.7 31.3 33.1 33.9 33.9 32.9 32.7 31.8 30.7
Racine Racine-Payne & Dolan ppb 31.6 29.4 27.5 26.1 25 24.1 23.4 22.3 21.7 21.7 22.2 22.9 24.4 26.5 29.4 32.2 34.8 36.7 38 38.8 38.4 38 37 36
Rock Beloit-Converse ppb 27.4 25.4 23.7 21.9 19.9 18.2 17.9 18.3 18.1 19.6 20.9 23.7 27.1 30.7 34.2 37.3 37.5 38.4 39.3 39 38.4 37.5 36.3 34.8
Sauk Devils Lake ppb 31.9 31.3 30.1 28.8 27.5 26.2 25.4 25 25 25.3 26.9 29 30.9 32.7 34.1 35.4 36.5 37 36.8 36.5 36.1 35.5 34.8 33.7
Sheboygan Sheboygan-Haven ppb 31.2 29.6 28.6 28 26.6 25.4 24.2 23.7 23 22.6 22 21.9 22.6 23.9 25.8 27.7 29.4 30.9 32.1 32.5 32.6 32.2 31.3 30.2
Sheboygan Sheboygan-Kohler Andrae ppb 28.4 26.8 25.9 25 24.1 23.6 22.8 22 21.2 20.9 20.4 20.8 21.8 23 25 26.8 28.5 29.8 30.9 31.5 31.9 31.6 30.4 29.3
Vilas Trout Lake ppb 20.1 17.9 16.4 15.5 15.5 15.9 16.8 18 19.6 21.3 22.9 24 24.8 25.7 26.4 26.9 27 26.9 26.8 26.7 26.3 25.7 25.1 24.4
Walworth Elkhorn ppb 30.3 28.7 27.5 26.8 25.5 23.9 22.5 21.3 20.9 20.8 21.1 22.4 25.1 27.9 30.8 33.3 35.2 36.9 38.2 38.3 37.8 37 36.3 35.2
Waukesha Waukesha-Cleveland Ave. ppb 21.4 17.9 13.9 10 8.1 7.9 8.4 9.9 11.6 13.3 16.2 19.8 22.2 25.1 28.2 31.2 33.7 35.6 36.7 36.7 36.7 36 35.5 35