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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 PM2.5

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Monday, 
County Site Units 24-Hour Hour of Day 1-Hour Hour of Day
Outagamie Appleton µg/m³ 7.8 01 AM 7.2 12 AM
Ashland Bad River Tribal School µg/m³ 3.2 12 AM 2.8 01 PM
Kenosha Chiwaukee Prairie µg/m³ 10.8 12 AM 9.2 06 AM
Sauk Devils Lake µg/m³ 5.7 12 AM 9.3 12 AM
Eau Claire Eau Claire DOT Sign Shop µg/m³ 5.3 12 AM 3.3 11 PM
Brown Green Bay East High µg/m³ 8.1 12 AM 11.5 12 AM
Ozaukee Harrington Beach Park µg/m³ 7.7 12 AM 9.6 02 AM
Dodge Horicon Wildlife Area µg/m³ 7.8 12 AM 8.5 12 AM
Marathon Lake Dubay µg/m³
Dane Madison East µg/m³ 7.3 12 AM 9.4 01 AM
Dane Madison University Ave. Well #6 µg/m³ 7.7 12 AM 9.5 01 AM
Milwaukee Milwaukee-16th St. Health Center µg/m³ 14 12 AM 10.7 03 AM
Milwaukee Milwaukee-College Ave NR µg/m³ 11 12 AM 11.3 04 AM
Forest Potawatomi µg/m³ 3.7 12 AM 2.8 10 PM
Grant Potosi µg/m³ 9.3 12 AM 21.5 08 PM
Waukesha Waukesha-Cleveland Ave. µg/m³ 10.8 12 AM 11.2 12 AM