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St. Louis River Area of Concern
Public Review and Input Opportunity Draft 2024 Remedial Action Plan Update for the St. Louis River Area of Concern The DNR is seeking public feedback on the draft 2024 Remedial Action Plan Update for…
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Wisconsin’s Great Waters Annual Photo Contest and Writing Project
Subscribe to receive updates and news about the Great Waters Photo Contest and Writing Project, including when the next calendar is available. Each year, the DNR's Office of Great Waters holds a photo contest and writing project. These…
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Lake Superior lake trout, splake and brook trout comparison
Lake Trout (top) Splake (middle) "Coaster" Brook Trout (bottom) Lake Trout (left) will have a deeply forked tail. Splake (middle) has a moderately forked tail. "Coaster" Brook Trout (right) has only a slightly forked tail. Splake has a…
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Air Toxics and Mercury
Air toxics, also called hazardous air pollutants (HAPs), are substances either known or suspected to cause cancer or other serious health problems, including damage to the immune, neurological, reproductive and respiratory systems. These pollutants…
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Refrigerant Recovery Program
Wisconsin law prohibits the release of regulated refrigerants into the atmosphere. The release of regulated refrigerants generally occurs as refrigeration and air-conditioning equipment is salvaged or dismantled for disposal. The refrigeration…
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Particle Pollution
Particulate Matter (PM) pollution consists of solid particles or liquid droplets suspended in the air. Fine particles (PM2.5) may be emitted directly into the atmosphere but are more commonly created by reactions of other pollutants, such as…
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Ozone
Ozone is a gas that occurs in both Earth's upper atmosphere and at ground level. When ozone is at ground level, it is a major component of smog and can cause a number of health problems for humans and other living things. Because of this serious…
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Air Education and Outreach
Public involvement is essential to the DNR's mission to protect the environment and human health through our programs and regulations. The Air Management Program has several resources to help members of the public stay informed about air quality…
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Air Quality Monitoring
Wisconsin's ambient air quality monitoring network is spatially distributed as outlined by the Clean Air Act to provide timely access to air quality information, support planning for air quality improvements and verify program adequacy. The network…
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Mobile Sources and Fuels
Mobile sources are any vehicle or equipment, including automobiles, trucks, aircraft, locomotives, watercraft, construction equipment, lawnmowers and others that generate air emissions. Mobile source emissions account for a majority of all human-…