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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 14.6 13.8 13.5 13.7 13.4 13.4 13.2 12.5 12.7 13.3 14.5 17.1 21.2 25.5 29.9 33.1 34.7 35.6 35 33.3 30.9 30.3 30 29.6
Brown Green Bay UW ppb 22.9 22.3 22.3 22.2 21.7 21.2 21.1 21.5 22.4 23.8 25.4 27.2 29.1 31.4 32.8 34.1 35.5 36.8 38.3 38.9 39.3 39.2 38.5 37.8
Columbia Columbus ppb 24.5 22.3 20.7 19.5 19.2 18.2 18.1 19.4 21.1 23.1 25 27.3 28.5 31.6 34.3 35.9 37.1 37.4 37.1 35.6 33.2 30.1 26.6 22.7
Dane Madison East ppb 26 23.7 22 20.5 19.2 19.2 19.8 20.3 22.1 23.9 25.4 26.7 28.2 32.8 31.1 29.4 26.6 23.9
Dodge Horicon Wildlife Area ppb 28.2 27.4 27.1 26.9 26.3 25.6 24.7 24.1 23.8 24.7 26.4 27.9 29.5 31.4 33.8 36.1 38 38.6 37.7 36.5 35.3 34 32.5 30.8
Door Newport Park ppb 9.6 8.6 9 10.6 12 13.8 15.5 17.3 19.7 22.5 25 26.7 29 31 32.7 33.8 34.4 34.8 35.8 36.7 37.4 38.4 39.1 39
Eau Claire Eau Claire DOT Sign Shop ppb 33.4 32.3 31.9 31.2 30.8 28.8 26.2 24.9 34.1 39.2 44.9 45.9 46.5 48 47.7 45.6 43.8 40.9 36.5 31.2
Fond du Lac Fond Du Lac ppb 27.3 26.8 26.7 26.5 26.4 26.2 25.7 24.7 24.2 24.3 25.4 27 28.7 30.6 32.9 35.5 37.7 38.8 38 36.7 35.4 34 32.4 30.9
Forest Potawatomi ppb 23.8 24.3 25 25.6 25.9 26 25.8 25.5 25.6 25.9 26.5 27.6 29.2 30.9 32.3 33.4 33.8 34.1 33.9 33.4 32.8 32.2 32 32
Jefferson Jefferson-Laatsch ppb 25.7 23.8 22.5 21.3 20 18.9 18.5 18.9 19.6 21 22.5 24 25.7 27.8 29.6 31.1 32 31.7 31 29.8 28.2 25.8 23.2 20.5
Kenosha Chiwaukee Prairie ppb 34.9 34.8 33.7 32.3 31.1 29.7 27 24.3 22.5 21.2 21.1 21.2 20.8 20.5 21.6 23.6 25 26.5 27.8 29.3 31.2 32.4 32.7 32.3
Kenosha Kenosha-Water Tower ppb 27.6 27.4 27.4 27.2 26.8 26.4 24.6 22.3 21.3 20.5 20.2 20.1 20 20 21.2 22.8 23.5 24.3 25 25.9 27.3 28.6 29.5 29.8
Kewaunee Kewaunee ppb 30.3 29.2 28.4 27.9 27.9 27.8 28.5 29.4 30.3 31 31.7 32.2 32.9 33.5 34.8 36 37.7 39.8 41.5 41.7 42.6 43.2 42.8 42.2
La Crosse La Crosse DOT ppb 39 38.4 37.8 37.1 37.2 36.7 36.1 35.5 35 34.7 35 36 36.5 37.7 39.2 40.8 42.4 43.8 44.4 44.2 43.7 42.8 41 38.1
Manitowoc Manitowoc ppb 10.1 6.6 4.4 2.9 2 3.7 7.2 10.7 14.5 18.3 21.7 25.5 29.9 32.4 33.5 35.1 37.1 38.6 40.1 41.3 41.8 41.9 41.7 40.8
Marathon Lake Dubay ppb 29.4 28.3 27 26.4 25.7 25.1 24.4 23.7 23.4 23.2 23.4 24 25.5 27.9 30.7 33.4 35.5 37.4 39.2 40.2 40.3 39.3 37.8 35.8
Milwaukee Bayside ppb 21.4 18.4 15.7 12.9 13.2 13.7 14.6 14.9 16 17.4 20 23.7 25.1 26.6 27.6 29.6 32.1 34.5 36 36 35.5 35 34.7 34.2
Milwaukee Milwaukee-16th St. Health Center ppb 19.9 16.9 14.8 13.9 12.9 11.7 9.8 9 10.8 13.6 16.4 19.5 21.3 23.2 25.4 27.8 29.4 30.3 30.7 30.3 29.8 29.6 28.8 27.8
Milwaukee Milwaukee-UWM UPark ppb 23.1 20.7 18 15.4 16 16.2 16.4 16.1 16.5 17.8 20.6 24.4 25.5 26.8 28.2 30.1 32.3 34.1 35.2 35.2 34.9 34.8 34.7 34.4
Outagamie Appleton ppb 23.4 21.4 19.3 17.8 16.3 15 14 14.1 15.2 17.3 20.2 23 25.7 28.4 31.5 33.8 35.7 36.8 37.2 37 36.3 35.2 33.4 31.6
Ozaukee Grafton ppb 19 15.8 13 10.9 11.6 12.9 14.1 15 15.5 17.2 19 21.6 24.9 27.7 30.4 32.8 35 37.1 38.8 39 38.5 37.7 36.9 36.3
Ozaukee Harrington Beach Park ppb 30.8 29.9 28.5 28.3 28.3 28.7 29.1 29.4 29.9 30.3 31.6 32.3 33.1 34.1 35.3 36.7 37.8 39.4 40.4 40.9 40.9 40.6 40 39.4
Racine Racine-Payne & Dolan ppb 27.1 27.3 28.1 29.2 29.9 29.7 29 27.5 26.3 25.5 24.8 24.7 24.8 24.8 25.2 26.9 28.6 29.6 30.1 30.1 30.3 30.6 30.5 29.6
Rock Beloit-Converse ppb 23.7 20.9 19.5 18.6 17.7 17.4 17.3 17.4 17.2 17.6 18.5 19.1 19.9 20.8 22.2 24.1 26.1 27 27.7 27.8 27.6 26.9 25.7 24
Sauk Devils Lake ppb 29.7 28 25.9 23.7 21.5 20.5 20.7 21.8 23.9 25.8 27.9 30.4 32.8 34.9 36.7 38.1 38.3 38.6 38.6 37.9 36.6 34.9 32.7 30.5
Sheboygan Sheboygan-Haven ppb 19.3 16.8 14.6 13.4 12.5 11.2 10.5 11.9 14.6 17.1 20.4 22.3 23.7 26.9 30.6 33.7 35.6 36.7 37.7 38.1 38.6 38.7 38.2 36.9
Sheboygan Sheboygan-Kohler Andrae ppb 33.2 33 32.7 32.5 32.4 32.4 32.5 32.6 33.7 33.4 33.5 33.9 34.5 35.8 37.1 38.6 39.5 40.7 41.5 41.9 42.1 41.4 40.4 39.3
Vilas Trout Lake ppb 19.2 18.9 19.2 20 20.9 21.6 22 22.2 22.8 23.3 24.3 26.1 28.6 31.5 34.2 36.3 38.5 40.2 41.8 42.7 42.6 41.5 40.4 39.3
Walworth Elkhorn ppb 17.2 15.4 14.9 14.6 14.3 14.4 15.6 17.1 19.6 21.7 23.6 24.9 24.9 26.3 27 27 26.5 25.3 23.1 21.4 20 18.8 17.6 16.6
Waukesha Waukesha-Cleveland Ave. ppb 22.5 21.2 20.4 19.9 20.3 20.4 20.1 19.8 20.2 20.1 21.9 24.1 25.8 27.9 31 34.6 34.6 34.1 33.7 33 32.2 31.3 30.3 29