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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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Tuesday, 
County Site Units 24-Hour Hour of Day 1-Hour Hour of Day
Outagamie Appleton µg/m³ 3.9 11 PM 5.6 11 PM
Ashland Bad River Tribal School µg/m³ 3.2 11 PM 5.2 09 PM
Kenosha Chiwaukee Prairie µg/m³ 4.3 12 AM 4.9 10 PM
Sauk Devils Lake µg/m³ 3.7 10 PM 5 10 PM
Eau Claire Eau Claire DOT Sign Shop µg/m³ 3.9 11 PM 5.1 11 PM
Brown Green Bay East High µg/m³ 3.7 11 PM 5 11 PM
Ozaukee Harrington Beach Park µg/m³ 3.1 11 PM 4.5 11 PM
Dodge Horicon Wildlife Area µg/m³ 3.5 11 PM 6.1 10 PM
Marathon Lake Dubay µg/m³
Dane Madison East µg/m³ 4.1 11 PM 6.7 11 PM
Dane Madison University Ave. Well #6 µg/m³ 4.4 11 PM 7.4 08 PM
Milwaukee Milwaukee-16th St. Health Center µg/m³ 4.5 11 PM 8 08 PM
Milwaukee Milwaukee-College Ave NR µg/m³ 4.4 12 AM 5.2 11 PM
Forest Potawatomi µg/m³ 2.5 07 PM 2.7 05 AM
Grant Potosi µg/m³ 7.2 10 AM 16.9 09 PM
Waukesha Waukesha-Cleveland Ave. µg/m³ 4.3 11 PM 7.7 11 PM