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Municipal Storm Water Management
The goal of municipal storm water management is to decrease the pollutants carried to waters of the state through MS4s (Municipal Separate Storm Sewer System).- MS4 Notices of Intent
- MS4 permit forms and publications
- Municipal General Permit [PDF 116KB]
- Responses to Public Comments [PDF 105KB]
- NR 216 with Phase II Revisions
Special for Municipalities affected by New Storm Water Regulation!
WisLine Web Workshops Held March 21-22, 2006! See the rebroadcast... [exit DNR]Held throughout the state - See "New Stormwater Regulations What They Mean for Your Community"
New State Stormwater Rules: What Municipalities Need to Know About Public Outreach & Education - DNR PUB WT-839-2006 [PDF 908KB]
Runoff from municipal areas contains a mixture of pollutants from parking lots, streets, rooftops, lawns, and other areas. These
areas contribute heavy metals, pesticides, sediment, nutrients, bacteria, and oxygen-demanding organic waste. Although (MS4s) are efficient at conveying water to avoid flooding, they also transport polluted runoff directly into nearby lakes, rivers, and streams without the benefit of wastewater treatment or filtration by soil or vegetation.
Wisconsin has been regulating storm water quality discharges from large municipalities since 1994. The storm water quality rule has been revised to include federal storm water regulation changes. This revised rule has been in effect since August 2004 (see NR 216 with Phase II Revisions).
Municipalities affected by the 2004 revised rule must apply for coverage under the Municipal General Permit [PDF 116KB]. The use of general permits was part of the NR 216 revisions (see Responses to Public Comments [PDF 105KB]). Municipalities must first fill out a Notice of Intent (NOI) form.
The MS4 permits include information and education of residential landowners, illicit discharge detection and elimination, creation and enforcement of local ordinances to regulate erosion control and long-term storm water management and implementation of pollution prevention at municipally-owned facilities. MS4 permits require implementation of best management practices for source-area control instead of numerical effluent limits. Financial assistance is available to assist in permit compliance through both the Urban Nonpoint Source and Storm Water Grants and the DNR Bureau of Community Financial Assistance.
- Guidance: MS4 Modeling - NR 151.13 (20/40% TSS Standard) [PDF 218KB]
- Errata for MS4 Modeling (8/15/2005)
[PDF 29KB]
- Process to Assess and Model Grass Swales (TSS Reduction) (4/24/2008)
[PDF 52KB]
- Developed Urban Areas - Turf Nutrient Management [PDF 136KB]
For more information about municipal storm water permits, contact your Regional Storm Water Management Specialist.
Contact Jim Bertolacini with feedback about this page.
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