About/General
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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-…
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Construction site storm water permits
On October 1, 2021 the department has made a final determination to reissue the Wisconsin Pollution Discharge Elimination System “Construction Site Storm Water Runoff General Permit” Storm Water Associated With Land Disturbing Construction Activity…
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What you can do
The best way for you to become a solution to NPS pollution is to make your home a pollution-free zone. To start, try some of these helpful hints.
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Urban nonpoint source pollution
Nonpoint source pollution, or polluted runoff, has many sources, including urban areas. Because most urban areas include such impervious surfaces as roads, building roofs and parking lots, rainfall and other precipitation have a more difficult time…
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Nonpoint source TMDL implementation
Nonpoint source pollution continues to be a primary cause of water quality problems in Wisconsin. The state has numerous lakes, streams, and rivers that are not meeting water quality standards and are considered to be "impaired" as a result of…
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Nonpoint Source Program
Wisconsin is a recognized leader in efforts to control nonpoint source (NPS) pollution. Since 1978, Wisconsin’s NPS Program has made significant progress in addressing runoff-related water quality problems that, in many cases, have existed for…
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Agricultural nonpoint source pollution
Nonpoint source pollution (or "runoff pollution") of Wisconsin’s waters comes from many sources, including agricultural operations and croplands. When it rains or snow melts, that water may be polluted through contact with manure, feed leachate…
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Plan map
The watersheds shown on this map have DNR and EPA-approved Nine Key Element watershed plans. To review the Nine Key Element watershed plan areas with other DNR GIS layers, use: Water condition viewer * Note: The Priority Watershed and Lakes…