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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 7/4/2025 08:00 to 7/4/2025 23:00 for these counties: Kenosha,Milwaukee,Ozaukee,Racine .
  • 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.

Highest Ozone

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Saturday, 
County Site Units 8-Hour Hour of Day 1-Hour Hour of Day
Outagamie Appleton ppb
Ashland Bad River Tribal School ppb 44.5 08 PM 45.8 03 PM
Milwaukee Bayside ppb
Rock Beloit-Converse ppb
Kenosha Chiwaukee Prairie ppb
Columbia Columbus ppb
Sauk Devils Lake ppb
Eau Claire Eau Claire DOT Sign Shop ppb
Walworth Elkhorn ppb
Fond du Lac Fond Du Lac ppb
Ozaukee Grafton ppb
Brown Green Bay UW ppb
Ozaukee Harrington Beach Park ppb
Dodge Horicon Wildlife Area ppb 42 05 PM 44.4 02 PM
Jefferson Jefferson-Laatsch ppb
Kenosha Kenosha-Water Tower ppb
Kewaunee Kewaunee ppb
La Crosse La Crosse DOT ppb
Marathon Lake Dubay ppb
Dane Madison East ppb
Manitowoc Manitowoc ppb
Milwaukee Milwaukee-16th St. Health Center ppb
Milwaukee Milwaukee-UWM UPark ppb
Door Newport Park ppb
Forest Potawatomi ppb 46.2 09 PM 47.1 04 PM
Racine Racine-Payne & Dolan ppb
Sheboygan Sheboygan-Haven ppb
Sheboygan Sheboygan-Kohler Andrae ppb
Vilas Trout Lake ppb
Waukesha Waukesha-Cleveland Ave. ppb