Air Quality

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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…

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…

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…

Air Quality News and Subscriptions

The DNR uses GovDelivery to help us more efficiently manage our communications and offer more subscription options to our customers. To learn more about these subscriptions and to sign up, please click on the "Subscriptions" tab below.Air NewsAir…

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…

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-…

Winter Tips

Whether staying indoors around the fireplace or enjoying outdoor activities, air quality and energy remain important parts of winter life. Daily use of electricity and fuel contributes to air pollution. The choices we make every day can directly…

Summer Tips

Welcome summer! As citizens go for a swim in one of Wisconsin's lakes, cookout in the backyard or go on a long summer bike ride, air quality remains an important part of everyday life. The hot humid weather is the perfect time to find ways to save…

Spring Tips

The days are warm and the nights are cool. The trillium and tulips are emerging from the soil and spring has arrived. This is a great time of year to make choices that will improve air quality and the environment. Spring is a season of new growth.…