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Minnesota Stormwater Manual

Difference between revisions of "What is a municipal separate storm sewer system (MS4)?"

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[[File:St Croix and Mississippi river confluence.jpg|400px|right|thumb|alt=river confluence|<font size=3>St. Croix River and Mississippi River confluence</font size>]]
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A municipal separate storm sewer system (MS4) is a means of transportation, individually or in a system, (e.g. roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man-made channels, storm drains, etc.) that are:
 
A municipal separate storm sewer system (MS4) is a means of transportation, individually or in a system, (e.g. roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man-made channels, storm drains, etc.) that are:
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*owned or operated by a public entity (e.g. cities, townships, counties, military bases, hospitals, prison complexes, highway departments, universities, etc.) with jurisdiction over disposal of sewage, industrial wastes, stormwater, or other wastes. This includes special districts under State law (sewer, flood control, or drainage districts, etc.), an authorized Indian tribal organization, or a designated and approved management agency under section 208 of the Clean Water Act;
 
*owned or operated by a public entity (e.g. cities, townships, counties, military bases, hospitals, prison complexes, highway departments, universities, etc.) with jurisdiction over disposal of sewage, industrial wastes, stormwater, or other wastes. This includes special districts under State law (sewer, flood control, or drainage districts, etc.), an authorized Indian tribal organization, or a designated and approved management agency under section 208 of the Clean Water Act;
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*designed or used for collecting or transporting stormwater;
 
*designed or used for collecting or transporting stormwater;
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*not a combined sewer; and
 
*not a combined sewer; and
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*not part of a publicly owned treatment works.
 
*not part of a publicly owned treatment works.
  
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The MPCA regulates owners or operators of certain MS4s under the National Pollutant Discharge Elimination System/State Disposal System (NPDES/SDS). The MPCA regulates the following:
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==Additional Resources==
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*An MS4 located fully or partially within an urbanized area as determined by the latest Decennial Census and owned or operated by a publicly owned entity that has the potential resident capacity, bed count occupancy, or average daily user population of 1,000 or more.
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*[https://youtu.be/xx1pgugfXeU MS4 Program Overview and minimum control measures (MCM) descriptions - youtube video]
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*The entire jurisdiction of a city or township that is located fully or partially within an urbanized area as determined by the latest Decennial Census and owns or operates an MS4.
 
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*An MS4 owned or operated by a municipality with a population of 10,000 or more.
 
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*An MS4 owned or operated by a municipality with a population of at least 5,000 and discharges or has the potential to discharge stormwater to one of the following:
 
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**A water identified as an outstanding resource value water as identified in Minn R. 7050.0180, subparts 3 and 6.
 
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**A water identified as a trout lake or trout stream as identified in Minn. R. 6264.0050, subparts 2 and 4.
 
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**A water listed as impaired under section 303(d) of the Clean Water Act, 33 U.S.C. § 1313.
 
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Owners or operators of MS4s that meet the above criteria must submit an MS4 General Permit to the MPCA. Under the permit, the owner or operator is required to reduce the amount of sediment and pollution carried from stormwater to surface and ground water to the maximum extent practicable. Additionally, the permit requires the system owner or operator to develop a stormwater pollution prevention program (SWPPP) that incorporates best management practices (BMPs) most appropriate to their MS4.
 
  
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Note: The cities of Minneapolis and St. Paul are Large MS4s (population of 250,000 or more) and received reissued individual NPDES/SDS permits on January 21, 2011.
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[[Category:Level 2 - Regulatory/Municipal (MS4)]]

Latest revision as of 15:17, 3 December 2022

river confluence
St. Croix River and Mississippi River confluence

A municipal separate storm sewer system (MS4) is a means of transportation, individually or in a system, (e.g. roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man-made channels, storm drains, etc.) that are:

  • owned or operated by a public entity (e.g. cities, townships, counties, military bases, hospitals, prison complexes, highway departments, universities, etc.) with jurisdiction over disposal of sewage, industrial wastes, stormwater, or other wastes. This includes special districts under State law (sewer, flood control, or drainage districts, etc.), an authorized Indian tribal organization, or a designated and approved management agency under section 208 of the Clean Water Act;
  • designed or used for collecting or transporting stormwater;
  • not a combined sewer; and
  • not part of a publicly owned treatment works.

Additional Resources

Retrieved from "https://stormwater.pca.state.mn.us/index.php?title=What_is_a_municipal_separate_storm_sewer_system_(MS4)%3F&oldid=63273"

This page was last edited on 3 December 2022, at 15:17.