Anoka Conservation District staff giving a tour of a streambank stabilization project. Credit: Anoka Conservation DistrictSt. Paul residents becoming involved in stormwater management by stenciling storm drainsImage of a person collecting a water sample from an outfallConstruction site adjacent to water bodyInfiltration basin protected by silt fence during constructionPerson documenting findings while inspecting an outfallimage
Hover each image to see a short description for the MS4 Minimum Control Measures and to link to more information on that measure

Main MS4 page

The municipal separate storm sewer system (MS4) stormwater program is designed to reduce the amount of sediment and pollution that enters surface and ground water from storm sewer systems. Public entities that own or operate an MS4 play a key role in preventing or reducing the negative impacts stormwater runoff has on our valuable water resources.

Proper stormwater runoff management in urbanized areas is especially important for restoring and protecting surface waters. Urbanized areas are more likely to have activities that contribute pollutants to stormwater runoff, like applying anti/deicing mixtures to roads; fueling vehicles; grease, oil, and other spills; landscaping; and using pesticides and fertilizers. Urbanized areas have a large amount of impervious surfaces, or surfaces that rain and snowmelt cannot pass through, such as streets, driveways, rooftops, parking lots and sidewalks. Stormwater runoff from these surfaces travels faster and in higher amounts, damaging rivers, streams, and wetlands; destroying aquatic habitats; increasing the amount of pollutants that enter surface waters; and limiting groundwater recharge.

This page links to pages, subcategories, and other information on municipal stormwater, particularly as related to the MS4 permit and municipal stormwater regulations.

Pages in category "Level 2 - Regulatory/Municipal (MS4)"

The following 72 pages are in this category, out of 72 total.


Media in category "Level 2 - Regulatory/Municipal (MS4)"

The following 7 files are in this category, out of 7 total.

This page was last edited on 12 February 2023, at 13:50.