About/General
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Salt and storm water
Wisconsin winters cause us to rely heavily on salting our roads, parking lots and sidewalks. But high salt use causes Wisconsin’s lakes, streams and drinking water to suffer. The growing salt problem threatens our fish and other aquatic life, and…
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Storm water runoff regulation
Congress amended the federal Clean Water Act in 1987 to control storm water pollution. In 1990, federal regulations required owners of storm water pollution sources, including many industries, municipalities and construction sites, to have National…
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Why is Storm Water Runoff a Problem?
Storm Water Runoff is Not Clean Water Storm water runoff carries pollutants that can seriously harm our waters. These types of pollutants are commonly found in storm water runoff.
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What you can do to help
Certain activities like walking your dog or driving your car can leave pollutants on the ground that can wash off in rain water. All the hard surfaces you use every day, such as parking lots, driveways, rooftops, and sidewalks, dramatically…
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Photo Gallery: Storm Water Best Management Practices
Best Management Practices (BMPs) improve water quality, protect downstream water bodies, reduce flooding, and can be aesthetically pleasing. This photo gallery provides examples of BMPs for commercial, residential, and industrial sites.
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Frequently Asked Questions (FAQ)
General storm water questions My land is being flooded by water draining from another property. Can the DNR do something about it? No. The DNR’s authority is limited to regulating the pollutants carried in storm water runoff and it does not…
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Learn More About Storm Water Runoff
Urban storm water runoff contains pollutants from roads, parking lots, construction sites, industrial storage yards and lawns. Learn how these pollutants affect water quality, what Wisconsin is doing to reduce pollutants in runoff, and how you can…
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Industrial storm water permit overview
Learn more about the different types of industrial storm water permits and requirements. Tier 1 and Tier 2 industrial facilities Natural Resources Chapter 216, Wis. Adm. Code, (NR 216) lists certain types of industries in the state that need to…
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Industrial storm water permits
By February 15th of each calendar year, industrial storm water permittees are required to perform an annual check to determine whether their facility discharges a pollutant of concern via storm water to a waterbody subject to a state and federally…
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Construction site storm water permit overview
Landowners of most construction projects where one or more acres of land will be disturbed must submit an application called a Notice of Intent (NOI) to request coverage under the Construction Site Storm Water Runoff General Permit No. WI-…