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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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Sunday, 
County Site Units 24-Hour Hour of Day 1-Hour Hour of Day
Outagamie Appleton µg/m³ 9.4 12 AM 4.6 05 PM
Ashland Bad River Tribal School µg/m³ 3.6 11 PM 4.2 10 PM
Kenosha Chiwaukee Prairie µg/m³ 15.7 12 AM 3.9 11 AM
Sauk Devils Lake µg/m³ 10.3 12 AM 6.1 07 PM
Eau Claire Eau Claire DOT Sign Shop µg/m³ 8.9 12 AM 5.1 07 AM
Brown Green Bay East High µg/m³ 10.1 12 AM 4.9 05 AM
Ozaukee Harrington Beach Park µg/m³ 11.3 12 AM 3.4 09 AM
Dodge Horicon Wildlife Area µg/m³ 9.3 12 AM 4.3 05 PM
Marathon Lake Dubay µg/m³
Dane Madison East µg/m³ 11.6 12 AM 5.5 05 PM
Dane Madison University Ave. Well #6 µg/m³ 12.1 12 AM 9.9 07 PM
Milwaukee Milwaukee-16th St. Health Center µg/m³ 15.2 12 AM 4.7 05 PM
Milwaukee Milwaukee-College Ave NR µg/m³ 12.7 12 AM 3.7 08 AM
Forest Potawatomi µg/m³ 5.3 12 AM 3.6 05 PM
Grant Potosi µg/m³ 14.4 12 AM 12.5 10 PM
Waukesha Waukesha-Cleveland Ave. µg/m³ 12.9 12 AM 5.2 08 PM