-
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

Filter by County:
Filter by Site:
Thursday, 
County Site Units 24-Hour Hour of Day 1-Hour Hour of Day
Outagamie Appleton µg/m³ 10 10 AM 10.4 02 AM
Ashland Bad River Tribal School µg/m³ 7.4 07 PM 9.7 12 AM
Kenosha Chiwaukee Prairie µg/m³ 7.6 10 PM 9.1 01 AM
Sauk Devils Lake µg/m³ 9.9 07 AM 10.1 03 AM
Eau Claire Eau Claire DOT Sign Shop µg/m³ 8.7 09 PM 10.7 09 PM
Brown Green Bay East High µg/m³ 9.4 11 PM 10 12 PM
Ozaukee Harrington Beach Park µg/m³ 7.4 02 AM 9.4 04 AM
Dodge Horicon Wildlife Area µg/m³ 10.4 01 AM 9.9 12 AM
Marathon Lake Dubay µg/m³
Dane Madison East µg/m³ 8.4 12 AM 8.3 03 AM
Dane Madison University Ave. Well #6 µg/m³ 11.3 12 AM 10.1 12 AM
Milwaukee Milwaukee-16th St. Health Center µg/m³ 9.4 02 AM 12.4 01 AM
Milwaukee Milwaukee-College Ave NR µg/m³ 8.7 10 PM 12.3 01 AM
Forest Potawatomi µg/m³ 6.2 08 PM 7.6 01 AM
Grant Potosi µg/m³ 9.4 01 PM 11.9 03 AM
Waukesha Waukesha-Cleveland Ave. µg/m³ 11.7 02 AM 13.5 02 AM