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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 25.8 23.1 20.1 17.7 16.7 16.7 15.8 15.2 16 18 20.7 24.2 27.3 30.2 32.5 33.7 34.5 34.6 33.5 31.4 28.7 26.1 23.5 21.3
Brown Green Bay UW ppb 52.5 49.2 45 40.4 38.3 34.2 30.8 28.7 27.3 26.4 26.7 27.8 28.2 29 30 31 31.7 32.3 32.3 31.6 30.3 29 27.6 26.2
Columbia Columbus ppb 52.5 50.4 47.8 45.1 44 41.6 39.3 37.5 36 35.1 35.2 35.7 36.4 37.6 39.3 41.4 43.5 44.8 45.5 45.4 44.5 42.9 40.4 36.9
Dane Madison East ppb 51.7 47.9 43.4 39.7 37.4 35 32.8 31.2 30.5 31.6 34 36.4 38.6 41.1 43.4 45.2 46.8 47.9 48.2 47.3 45 41.8 39.1 35.8
Dodge Horicon Wildlife Area ppb 52 49.4 47.1 45.2 42.5 39.9 37.6 35.8 34.5 33.6 33.1 32.9 34.1 35.6 37 38.1 39.2 40.2 40.8 40.8 40 38.9 37.8 36.4
Door Newport Park ppb 47.4 42.6 36.4 30.2 26.4 23.9 22.7 22.5 21.9 21.7 22.7 23.8 24.7 25.7 26.4 26.8 27.2 27.6 27.8 27.9 27.5 26.4 25.4 24.9
Eau Claire Eau Claire DOT Sign Shop ppb 33.5 27.7 22.4 19.3 17.6 14.6 13.7 15.2 17.8 20.5 23 25.1 26.8 30.9 34.1 36.5 38.4 40 40.8 40.4 38.9 37.1 34.8 30.9
Fond du Lac Fond Du Lac ppb 47.9 45.8 44.1 42.3 39.9 37.3 35.3 33.7 32.6 31.9 31.1 31 32.3 34 34.9 36 37.3 38.4 38.8 38.1 36 34.4 32.9 31.2
Forest Potawatomi ppb 36 31.5 27.1 25.4 23.4 21.9 21.1 20.8 20.9 21.3 21.9 22.8 24 25.4 27.4 29 30.4 31.5 32.1 32.2 32.1 31.3 30 28.8
Jefferson Jefferson-Laatsch ppb 49.2 46.8 43.9 40 36.1 33.1 31.1 29.8 29.1 29.3 30.2 32.8 35.7 38.1 40.3 42.3 44.1 45.6 46.6 46.5 45.4 43.6 41.1 38.5
Kenosha Chiwaukee Prairie ppb 48.1 46.3 44.9 43.8 42.7 41.9 41.6 41.7 42.1 43 43.5 43.5 43.9 43.4 42.6 41.5 40 37.5 35.3 34.9 33.6 33.3 33.5 33.8
Kenosha Kenosha-Water Tower ppb 48.3 46.2 44.6 43.7 42 41 40 39.3 39.2 39.9 40.1 40 41.2 41.3 41.2 41.1 40.1 38.3 36.9 35.2 33.4 32.6 32.5 32.2
Kewaunee Kewaunee ppb 55.9 52.7 48.7 44.3 41.2 38.1 34.8 32.3 30.1 29.4 29.7 30.7 31 31.4 32.1 32.6 33.1 33.2 32.8 32 30.9 29.6 28.4 27.4
La Crosse La Crosse DOT ppb 48.5 45.8 43.4 40.6 37.4 33.5 30 27.9 26.5 26.2 26.3 26.9 28.5 31.1 33.4 35.5 37.1 38.3 39.1 39.4 38.5 37.5 36 34.7
Manitowoc Manitowoc ppb 50.3 46.9 43.5 40 36.5 33.9 31.4 28.7 27.3 26.4 26.6 28 30.1 30.6 31.4 32.1 31.7 31.5 31.1 29.8 27.2 25.5 23 21.8
Marathon Lake Dubay ppb 45.3 41.8 37.8 33.7 29.7 27.3 25.7 23.8 23.3 23 23.3 24.4 26.1 27.9 30.1 32 33.6 34.4 35.1 35.3 34.9 34.2 32.2 30.1
Milwaukee Bayside ppb 51.1 49.2 47.4 45.6 43 40.7 40 39.1 38.7 38.6 38.4 37.7 37.7 37.7 36.8 36.3 35.5 34.4 33.2 32.5 32.1 31.6 31.2 30.4
Milwaukee Milwaukee-16th St. Health Center ppb 46.9 45 43.3 41.7 40.1 38.3 37.6 37 33.2 32.7 32.2 31.1 30.6 30.1 29.8 29.4
Milwaukee Milwaukee-UWM UPark ppb 50.8 49.1 47.3 45.6 43.5 41.6 41 40.8 40.5 40.1 39.4 38.7 38.2 38.3 37.2 35.7 34.2 33.8 33.6 33 32.9 32.7 32.5 32.3
Outagamie Appleton ppb 49.7 46 41.7 37.5 33 28.9 24.9 22.6 21.3 21 21.7 22.8 24.7 26.9 29.1 31 32.6 33.9 34.5 34 32.2 29.8 27.2 25.2
Ozaukee Grafton ppb 53.8 52 50.2 48.4 45.7 43.6 41.7 40.4 39.6 38.9 38.4 37.8 38.2 37.8 37.6 37.2 36.6 36.2 35.3 34.6 33.9 33.2 32.6 31.8
Ozaukee Harrington Beach Park ppb 52.9 50.9 50 49.5 33.9 33.6 33.3 32.6 31.9 31.2 30.5 29
Racine Racine-Payne & Dolan ppb 49.4 47 45.2 44 43 41.9 40.5 39.6 40 40.2 40.5 40.3 39.6 39.4 39.4 39 37.4 36.1 34.7 33.1 32 31.5 31.1 30.4
Rock Beloit-Converse ppb 49.2 46.3 43.6 41.9 40.7 38.7 37.2 36.3 36.7 38.3 40.3 41.7 43.1 45.8 48.3 50.8 53.2 54.9 55.8 54.9 53.2 50.9 48.5 45.3
Sauk Devils Lake ppb 54.1 52.7 50.3 47.3 44.4 41.7 39.2 37 35 33.4 32.5 33.2 35 37.1 39 40.6 41.9 42.4 41.6 40.7 38.8 36.4 34.4 31.7
Sheboygan Sheboygan-Haven ppb 52 50 48.5 46.4 44.1 42.2 40.4 38.4 36.4 34.7 33.1 32.6 32.9 33 33 33.3 33.6 33.8 33.7 32.9 31.5 30 27.1 25.1
Sheboygan Sheboygan-Kohler Andrae ppb 53.3 51.7 50.4 49 47 45.1 43.5 41.5 39.7 38.1 36.4 35.2 34.9 34.7 34.2 34.2 34.2 34.2 34.2 34.3 34.4 32.8 30.9 29
Vilas Trout Lake ppb 25 24.2 22.8 22.1 21.6 21.4 21.8 22.4 23.4 24.5 25.8 27.3 29.6 32.2 34.1 35.8 37.1 37.9 37.9 36.7 34.7 32 29.2 26.7
Walworth Elkhorn ppb 48.3 45.8 43.1 40.7 39 37.4 36.3 35.9 36 36.4 37.3 38.9 40.9 43 45 46.8 47.4 47.5 46.8 44.8 42.2 39.4 36.4 33
Waukesha Waukesha-Cleveland Ave. ppb 51 48.9 46.7 44.2 41.1 38.5 37.2 36.5 36.5 36.9 38.1 39.6 41.7 44.3 46.1 47 47.5 47.3 46.2 44.1 41.5 38.8 36.5 34.8