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Reasonably Available Control Technology (RACT) for Volatile Organic Compounds (VOC)
Volatile organic compounds (VOC) react in the atmosphere to produce ozone. This air pollutant can be harmful to people and the environment when present at elevated concentrations near the earth’s surface. Emissions of VOC are controlled through…
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Reasonably Available Control Technology (RACT) For Nitrogen Oxides (NOX)
Emissions of nitrogen oxides (NOx) must be controlled through the implementation of Reasonably Available Control Technology (RACT) regulations in ozone nonattainment areas that are classified as moderate or higher. Wisconsin RACT requirements that…
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Air Permit Public Involvement
Notice: Update personal bookmarks to the new links for the buttons below.The Clean Air Act and Wisconsin State Statutes call for public participation and input on air permit actions. The tables below can help the public find these opportunities.Air…
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Wisconsin Emissions Reduction Credit (ERC) Registry
The Wisconsin Emissions Reduction Credit (ERC) Registry assists facilities looking for emissions offsets to meet Nonattainment New Source Review (NNSR) permitting requirements. Facilities that voluntarily reduce emissions can use those reductions to…
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Ethylene Oxide
Ethylene oxide (EtO) is a flammable, colorless gas used to make other chemicals. It is necessary for the production of a range of products, including antifreeze, textiles, plastics, detergents and adhesives. Ethylene oxide also is used to sterilize…
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Air Permit Resources for Businesses
General OverviewPermit optionsPermitting requirements for nonattainment areasPSD class 1 areasApplying for a PermitHow to ApplyDispersion ModelingRenew a PermitPermit formsManaging Your PermitNotifying DNR about facility changes
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Air Monitoring Map for Industrial Sand Mine/Processing Plants
Industrial sand operations that have a requirement in their permit to monitor for particulate matter must provide ambient monitoring data to the DNR. The DNR Air Management Program works with industrial sand facilities to provide technical…
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Locations of Industrial Sand Mines and Processing Plants in Wisconsin
Industrial sand for use in the petroleum, glass and foundry industries has been produced in Wisconsin for over 40 years. The demand for sand increased exponentially starting in 2014, related to use of Wisconsin sand as a proppant in the extraction…
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Wisconsin's Air Quality Trends
There is a statewide network of 30 ozone monitoring sites and 18 fine particle (PM2.5) monitoring sites to measure ambient air quality in Wisconsin. In addition, the DNR monitoring network measures sulfur dioxide, nitrogen dioxide,…
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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…