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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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Monday, 
County Site Units 24-Hour Hour of Day 1-Hour Hour of Day
Outagamie Appleton µg/m³ 10.9 10 AM 14.7 01 AM
Ashland Bad River Tribal School µg/m³ 6.1 12 AM 8.5 10 PM
Kenosha Chiwaukee Prairie µg/m³ 13.7 09 PM 16.7 10 AM
Sauk Devils Lake µg/m³ 13.2 05 PM 17.1 01 AM
Eau Claire Eau Claire DOT Sign Shop µg/m³ 12.4 07 AM 18.5 03 AM
Brown Green Bay East High µg/m³ 9.6 07 AM 12.5 12 AM
Ozaukee Harrington Beach Park µg/m³ 10.8 06 PM 15.2 09 PM
Dodge Horicon Wildlife Area µg/m³ 12.4 06 PM 18 06 AM
Marathon Lake Dubay µg/m³
Dane Madison East µg/m³ 13.6 06 PM 24.3 06 AM
Dane Madison University Ave. Well #6 µg/m³ 14.1 04 PM 20.4 09 AM
Milwaukee Milwaukee-16th St. Health Center µg/m³ 14.5 05 PM 19 07 AM
Milwaukee Milwaukee-College Ave NR µg/m³ 13.5 08 PM 21.3 08 AM
Forest Potawatomi µg/m³ 8.8 12 AM 9.8 10 PM
Grant Potosi µg/m³ 16 06 PM 24 12 AM
Waukesha Waukesha-Cleveland Ave. µg/m³ 14.9 08 PM 22.1 08 AM