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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.

Highest PM2.5

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Friday, 
County Site Units 24-Hour Hour of Day 1-Hour Hour of Day
Outagamie Appleton µg/m³ 11.2 10 AM 16.5 04 AM
Ashland Bad River Tribal School µg/m³ 6.9 02 AM 7.3 12 AM
Kenosha Chiwaukee Prairie µg/m³ 12.5 05 PM 18.9 05 PM
Sauk Devils Lake µg/m³ 15.3 08 AM 18.1 02 PM
Eau Claire Eau Claire DOT Sign Shop µg/m³ 14 02 AM 21.5 12 AM
Brown Green Bay East High µg/m³ 10 10 AM 13.1 04 AM
Ozaukee Harrington Beach Park µg/m³ 10.5 03 PM 13.5 04 AM
Dodge Horicon Wildlife Area µg/m³ 12.8 02 PM 16.7 10 AM
Marathon Lake Dubay µg/m³
Dane Madison East µg/m³ 14.7 05 AM 17.3 04 PM
Dane Madison University Ave. Well #6 µg/m³ 16.2 06 AM 19.8 05 PM
Milwaukee Milwaukee-16th St. Health Center µg/m³ 18 07 PM 24.7 04 PM
Milwaukee Milwaukee-College Ave NR µg/m³ 15.3 06 PM 24.2 04 PM
Forest Potawatomi µg/m³ 7.4 12 AM 7.6 12 AM
Grant Potosi µg/m³ 15.8 05 AM 19.7 03 AM
Waukesha Waukesha-Cleveland Ave. µg/m³ 16.5 07 PM 26.2 06 AM