Storm Water
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Municipal storm water permit e-Reporting
When to e-ReportEffective January 2018, all municipalities permitted under the WPDES Municipal Separate Storm Sewer System (MS4) program submitting MS4 permit documents, including the Annual Reports due by March 31 each calendar year, must use the…
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Municipal storm water permits
More than two hundred municipalities in Wisconsin that include cities, villages, towns and counties within urbanized areas are required to have Municipal Separate Storm Sewer System (MS4) permits under NR 216, Wis. Adm. Code [exit DNR]. Use the…
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Storm water and related links
The links below connect to additional information about storm water management and other relevant topics.
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What is Storm Water Runoff?
Storm water runoff is rain and melting snow that flows off building rooftops, driveways, lawns, streets, parking lots, construction sites, and industrial storage yards. Developed areas are covered by buildings and pavement, which do not allow water…
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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…