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{{alert|This page is an edit and testing page use by the wiki authors.  It is not a content page for the Manual. Information on this page may not be accurate and should not be used as guidance in managing stormwater.|alert-danger}}
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{{alert|We recently updated this page and will continue to work on information about MS4 stormwater management. If you have suggestions, we welcome comments using the comment box at the bottom of most pages in the manual.|alert-info}}
 
{{alert|We recently updated this page and will continue to work on information about MS4 stormwater management. If you have suggestions, we welcome comments using the comment box at the bottom of most pages in the manual.|alert-info}}
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{{alert|NOTE: Minnesota uses the term Stormwater Pollution Prevention Program (SWPPP) for MS4 stormwater, while several states and EPA may use the term Stormwater Management Plan (SWMP). These terms refer to the same thing.|alert-info}}
  
 
[[file:Aerial city.jpg|300px|left|alt=icon for MS4 stormwater]]
 
[[file:Aerial city.jpg|300px|left|alt=icon for MS4 stormwater]]
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[[file:Check it out.png|150px|thumb|alt=image|<font size=3> [https://stormwater.pca.state.mn.us/index.php?title=MS4_staff_contact_information_and_staff_assignments  <b><center>MPCA MS4 staff contact information can be found at this link]</center></b></font size>]]
 
[[file:Check it out.png|150px|thumb|alt=image|<font size=3> [https://stormwater.pca.state.mn.us/index.php?title=MS4_staff_contact_information_and_staff_assignments  <b><center>MPCA MS4 staff contact information can be found at this link]</center></b></font size>]]
[[file:Check it out.png|150px|thumb|alt=image|<font size=3>[https://www.arcgis.com/apps/Cascade/index.html?appid=9af02c9b2a994e56910cce1dbba400c4 The City of Austin, MN, has created this neat web-based story map about stormwater and MS4.]</font size>]]
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<table class="infobox" ; text-align: left; width: 400px; font-size: 100%">
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<th><center><font size=3>'''Municipal Separate Storm Sewer System'''</font size></center></th>
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<td>
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*[https://stormwater.pca.state.mn.us/index.php?title=Aaron_test_MS4_page#Background_Information Background Information]
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*[https://stormwater.pca.state.mn.us/index.php?title=Aaron_test_MS4_page#2020_MS4_General_Permit 2020 MS4 General Permit]
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*[https://stormwater.pca.state.mn.us/index.php?title=Aaron_test_MS4_page#MS4_Stormwater_Permit MS4 Stormwater Permit]
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*[https://stormwater.pca.state.mn.us/index.php?title=Aaron_test_MS4_page#Previous_Permits Previous Permits]
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*[https://stormwater.pca.state.mn.us/index.php?title=Aaron_test_MS4_page#Minimum_Control_Measures Minimum Control Measures]
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*[https://stormwater.pca.state.mn.us/index.php?title=Aaron_test_MS4_page#Total_Maximum_Daily_Loads_(TMDLs) Total Maximum Daily Loads (TMDLs)]
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*[https://stormwater.pca.state.mn.us/index.php?title=Aaron_test_MS4_page#Tools_and_Resources Tools and Resources]
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*[https://stormwater.pca.state.mn.us/index.php?title=Aaron_test_MS4_page#MS4_Audit_Guidance MS4 Audit Guidance]
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*[https://stormwater.pca.state.mn.us/index.php?title=Aaron_test_MS4_page#MPCA_MS4_Technical_Assistance MPCA MS4 Technical Assistance]
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*[https://stormwater.pca.state.mn.us/index.php?title=Aaron_test_MS4_page#Other_Resources_and_Documents Other Resources and Documents]
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The municipal separate storm sewer system (MS4) stormwater program is designed to reduce the amount of <span title="any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bed or bottom of a body of water"> '''sediment'''</span> 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 <span title="the portion of rainfall or snowmelt not immediately absorbed into the soil that drains or flows off the land and becomes surface flow"> '''runoff'''</span> has on our valuable water resources.
 
The municipal separate storm sewer system (MS4) stormwater program is designed to reduce the amount of <span title="any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bed or bottom of a body of water"> '''sediment'''</span> 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 <span title="the portion of rainfall or snowmelt not immediately absorbed into the soil that drains or flows off the land and becomes surface flow"> '''runoff'''</span> 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.   
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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 and the MS4 program is to help mitigate the impact.   
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<div title="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:
 
1 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
 
2 designed or used for collecting or transporting stormwater
 
3 not a combined sewer
 
4 not part of a publicly owned treatment works">
 
*<u>What is a municipal separate storm sewer system (MS4)?</u>
 
</div>
 
  
<div title="Only certain MS4s in Minnesota are subject to stormwater regulation under the Clean Water Act and Minnesota Rule 7090. The MPCA regulates the following:
 
  
*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. See [https://stormwater.pca.state.mn.us/index.php?title=Information_about_the_2019_Legislation_and_affected_MS4s changes in regulated areas for cities and townships due to 2019 Legislation] for more information.
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<div title="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:
  
*An MS4 owned or operated by a municipality with a population of 10,000 or more.
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1. 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
  
*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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2. designed or used for collecting or transporting stormwater
**A water identified as an outstanding resource value water as identified in Minn R. 7050.0180, subparts 3 and 6.
 
**A water identified as a trout lake or trout stream as identified in Minn. R. 6264.0050, subparts 2 and 4.
 
**A water listed as impaired under section 303(d) of the Clean Water Act, 33 U.S.C. § 1313.
 
  
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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3. not a combined sewer
  
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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&#x2386; &#8226; 4. not part of a publicly owned treatment works">
*<u>Why is a municipality regulated under the MS4 permit?</u>
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<u>What is a municipal separate storm sewer system (MS4)?</u>
 
</div>
 
</div>
  
  
  
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<div title="Only certain MS4s in Minnesota are subject to stormwater regulation under the Clean Water Act and Minnesota Rule 7090. The MPCA regulates the following:
  
 +
1 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. See [https://stormwater.pca.state.mn.us/index.php?title=Information_about_the_2019_Legislation_and_affected_MS4s changes in regulated areas for cities and townships due to 2019 Legislation] for more information.
  
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2 An MS4 owned or operated by a municipality with a population of 10,000 or more.
  
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3 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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4 A water identified as an outstanding resource value water as identified in Minn R. 7050.0180, subparts 3 and 6.
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5 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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6 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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*<u>Why is a municipality regulated under the MS4 permit?</u>
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</div>
  
  
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*[[What is a municipal separate storm sewer system (MS4)?]]
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*[[Why is a municipality regulated under the MS4 permit?]]
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<br>
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==Background Information==
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*[[What is a municipal separate storm sewer system (MS4)?]] <pre>REMOVED CITY OF AUSTIN IMAGE AND LINK ON THE RIGHT, NO LONGER AVAILABLE, ALREADY MOVED YOUTUBE VIDEO FROM THIS PAGE'S OTHER RESOURCES. SHOULD WE REMOVE THE CONTACT INFORMATION FROM THE SIDE? WE HAVE IT DOWN LOW TOO.</pre>
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*[[Why is a municipality regulated under the MS4 permit?]] <pre>DELETE OTHER RESOURCES</pre>
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<br>
  
 
==2020 MS4 General Permit==
 
==2020 MS4 General Permit==
*[[2020 MS4 General Permit|Link here to the 2020 MS4 General Permit]] - this is the wiki version of the permit
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*[https://www.pca.state.mn.us/sites/default/files/wq-strm4-94.pdf 2020 MS4 General Permit PDF Version]
*[https://www.pca.state.mn.us/sites/default/files/wq-strm4-94.pdf Link here to the 2020 MS4 General Permit] - this links to a pdf of the permit
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*[https://stormwater.pca.state.mn.us/index.php?title=MS4_General_Permit_reissuance 2020 MS4 General Permit Reissuance Page]
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*[[2020 MS4 General Permit|2020 MS4 General Permit Wiki Version]]
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<br>
  
==2020 MS4 General Permit reissuance==
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==MS4 Stormwater Permit==
Visit the [[MS4 General Permit reissuance]] page for updates on the new MS4 General Permit.
 
 
 
==MS4 stormwater permit==
 
*[https://stormwater.pca.state.mn.us/index.php?title=MS4_Annual_Report MS4 Annual Report]
 
 
*[https://stormwater.pca.state.mn.us/index.php?title=File:Mpls_MS4Permit_Mod.pdf 2018 Minneapolis Phase I Permit]
 
*[https://stormwater.pca.state.mn.us/index.php?title=File:Mpls_MS4Permit_Mod.pdf 2018 Minneapolis Phase I Permit]
 
*[https://stormwater.pca.state.mn.us/index.php?title=File:Final_Permit-StPaul_MS4Permit.pdf 2018 St. Paul Phase 1 permit]
 
*[https://stormwater.pca.state.mn.us/index.php?title=File:Final_Permit-StPaul_MS4Permit.pdf 2018 St. Paul Phase 1 permit]
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*[https://stormwater.pca.state.mn.us/index.php?title=MS4_Annual_Report MS4 Annual Report]
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<br>
  
==Previous permits==
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==Previous Permits==
*[https://stormwater.pca.state.mn.us/index.php?title=2013_MS4_General_Permit MS4 General Permit]  
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*[https://stormwater.pca.state.mn.us/index.php?title=2013_MS4_General_Permit 2013 MS4 General Permit]  
*[https://stormwater.pca.state.mn.us/index.php?title=File:Minneapolis_2011_Phase_I_Permit_-_Minnesota_Stormwater_Manual_July_2022.pdf Minneapolis 2011 Phase I Permit]
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*[https://stormwater.pca.state.mn.us/index.php?title=File:Minneapolis_2011_Phase_I_Permit_-_Minnesota_Stormwater_Manual_July_2022.pdf 2011 Minneapolis Phase I Permit]
*[https://stormwater.pca.state.mn.us/index.php?title=File:St_Paul_2011_Phase_I_Permit_-_Minnesota_Stormwater_Manual_July_2022.pdf St Paul 2011 Phase I Permit]
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*[https://stormwater.pca.state.mn.us/index.php?title=File:St_Paul_2011_Phase_I_Permit_-_Minnesota_Stormwater_Manual_July_2022.pdf 2011 St. Paul Phase I Permit]
*[https://www.pca.state.mn.us/sites/default/files/wq-strm4-51.pdf 2006 permit]
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<!-- *[https://www.pca.state.mn.us/sites/default/files/wq-strm4-51.pdf 2006 permit] -->
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<br>
  
 
==Minimum Control Measures==
 
==Minimum Control Measures==
{{alert|NOTE: Minnesota uses the term Stormwater Pollution Prevention Program (SWPPP) for MS4 stormwater, while several states and EPA may use the term Stormwater Management Plan (SWMP). These terms refer to the same thing.|alert-info}}
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When seeking to manage a Municipal Storm Sewer System (MS4), an effective Stormwater Pollution Prevention Program (SWPPP) has six different components known as Minimum Control Measures (MCMs).
 
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<pre>WENT THROUGH AND CHECKED REDUNDANT AND BROKEN LINKS ON THE TEST MCM PAGES ALREADY</pre>
When seeking to manage a Municipal Storm Sewer System (MS4), an effective Stormwater Pollution Prevention Program (SWPPP) has six different components known as [[Minimum Control Measures (MCMs)]]. Follow this link to learn more about each MCM along with resources and guidance.
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*[https://stormwater.pca.state.mn.us/index.php?title=MCM_1_Public_Education_and_Outreach Minimum Control Measures 1 - Public Education and Outreach] <pre>PAGE NEEDS TO BE UPDATED WITH THE AARON TEST MCM 1 PAGE</pre>
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*[https://stormwater.pca.state.mn.us/index.php?title=MCM_2_Public_Participation/Involvement Minimum Control Measures 2 - Public Participation/Involvement] <pre>PAGE NEEDS TO BE UPDATED WITH THE AARON TEST 2 MCM PAGE</pre>
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*[https://stormwater.pca.state.mn.us/index.php?title=MCM_3_Illicit_Discharge_Detection_and_Elimination Minimum Control Measures 3 - Illicit Discharge Detection and Elimination] <pre>PAGE NEEDS TO BE UPDATED WITH THE AARON TEST MCM 3 PAGE</pre>
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*[https://stormwater.pca.state.mn.us/index.php?title=MCM_4_Construction_Site_Stormwater_Control Minimum Control Measures 4 - Construction Site Stormwater Control] <pre>PAGE NEEDS TO BE UPDATED WITH THE AARON TEST MCM 4 PAGE</pre>
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*[https://stormwater.pca.state.mn.us/index.php?title=MCM_5_Post-Construction_Stormwater_Management Minimum Control Measures 5 - Post-Construction Stormwater Management] <pre>PAGE NEEDS TO BE UPDATED WITH THE AARON TEST MCM 5 PAGE</pre>
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*[https://stormwater.pca.state.mn.us/index.php?title=MCM_6_Pollution_Prevention/Good_Housekeeping Minimum Control Measures 6 - Pollution Prevention/Good Housekeeping] <pre>PAGE NEEDS TO BE UPDATED WITH THE AARON TEST MCM 6 PAGE</pre>
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<br>
  
 
==Total Maximum Daily Loads (TMDLs)==
 
==Total Maximum Daily Loads (TMDLs)==
 
[[Total Maximum Daily Loads (TMDLs)]] are EPA approved amounts of pollutant loading that can occur and have a water body meet water quality standards. Follow this link to learn more about them along with guidance and resources.
 
[[Total Maximum Daily Loads (TMDLs)]] are EPA approved amounts of pollutant loading that can occur and have a water body meet water quality standards. Follow this link to learn more about them along with guidance and resources.
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<br><br>
  
==Tools and resources==
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==Tools and Resources==
*[[Municipal Separate Storm Sewer System (MS4) toolkit]]: A collection of resources for use by stormwater program staff. It is intended to help entities regulated under the MS4 program meet the requirements of the general permit. It offers a wide range of downloadable stormwater education information including sample fact sheets, newsletters, videos, and other resources.<br />
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<pre> CLEANED UP SOME OF THE BLOCK TEXT AND WIDDLED IT DOWN TO A MORE CLEAR AND CONCISE MESSAGE OR REMOVED TEXT ALL TOGETHER BECAUSE TITLE IS SELF EXPLANATORY</pre>
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*[https://stormwater.pca.state.mn.us/index.php?title=Assessing_total_suspended_sediment_and_total_phosphorus_removal_efficiency_of_permittee_owned/operated_constructed_stormwater_ponds Assessing Total Suspended Sediment and Total Phosphorus Removal Efficiency of Permittee Owned/Operated Constructed Stormwater Ponds]: guidance related to assessing the total suspended sediment (TSS) and total phosphorus (TP) removal efficiency of MS4 (Municipal Separate Storm Sewer System) permittee owned/operated ponds constructed and used for the collection and treatment of stormwater.
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*[https://stormwater.pca.state.mn.us/index.php?title=Regulatory/Municipal_(MS4)/Procedures_and_checklists#Checklist_Documents Checklist and Maintenance Documents and Examples of Procedures for MS4 BMP Methods] <pre>PAGE NEEDS TRANSFERRANCE</pre>
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*[https://stormwater.pca.state.mn.us/index.php?title=Documentation_requirements_and_documents_to_retain_under_the_MS4_permit Documentation Requirements and Documents to Retain Under the MS4 Permit] <pre>FIXED TABLE ALIGNMENT</pre>
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*[https://mpca.maps.arcgis.com/apps/webappviewer/index.html?id=8d310e604baa43699b25395834d0c69a MS4 Mapping Tool] - An interactive online map tool to view and explore Minnesota MS4 boundaries, defined urbanized areas, impaired waters, outstanding resource value waters, trout waters and approved TMDL study areas.<br>
 +
*[https://stormwater.pca.state.mn.us/index.php?title=New_permit_requirements_and_related_guidance_materials New Permit Requirements and Related Guidance Materials]
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*[https://stormwater.pca.state.mn.us/index.php?title=MS4_fact_sheets Pollution Prevention Guidance Fact Sheets] - A Collection of Minnesota Stormwater Manual Fact Sheets on MS4 Stormwater Pollution Prevention Methods.
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<br>
  
*[[MS4 Digital Document Library]]: Provides guidance to help local MS4 staff meet the requirements of the six [[Minimum Control Measures (MCMs)]] in the [https://stormwater.pca.state.mn.us/index.php?title=MS4_General_Permit 2013 MS4 General Permit] and assist with overall stormwater management. In addition to general guidance documents and photos/graphics, the Digital Document Library has example documents that stormwater staff are using to manage their stormwater pollution prevention programs (SWPPPs). All documents in the Digital Document Library are MPCA reviewed and available for anyone to download and use.<br />
+
==MS4 Audit Guidance==  
 
 
*[https://mpca.maps.arcgis.com/apps/webappviewer/index.html?id=8d310e604baa43699b25395834d0c69a MS4 mapping tool]: An interactive online map tool that can be used to view and explore Minnesota MS4 boundaries, defined urbanized areas, impaired waters, outstanding resource value waters, trout waters and approved TMDL study areas.<br />
 
 
 
*<font size=4>'''NEW'''</font size>  [[Assessing total suspended sediment and total phosphorus removal efficiency of permittee owned/operated constructed stormwater ponds]]: guidance related to assessing the total suspended sediment (TSS) and total phosphorus (TP) removal efficiency of MS4 (Municipal Separate Storm Sewer System) permittee owned/operated ponds constructed and used for the collection and treatment of stormwater.
 
 
 
*[https://stormwater.pca.state.mn.us/index.php?title=MS4_fact_sheets Pollution prevention guidance fact sheets]: A collection of links to a variety of Minnesota Stormwater Manual fact sheets on stormwater pollution prevention methods within MS4s.
 
 
 
==MS4 audit guidance==  
 
 
The U.S. Environmental Protection Agency (EPA) mandates the Minnesota Pollution Control Agency (MPCA) to evaluate MS4 permittees for compliance with the [https://www.pca.state.mn.us/sites/default/files/wq-strm4-59k.pdf MS4 General Permit]. The MPCA does this through compliance audits. To find out more information about the audit process see the pages below:
 
The U.S. Environmental Protection Agency (EPA) mandates the Minnesota Pollution Control Agency (MPCA) to evaluate MS4 permittees for compliance with the [https://www.pca.state.mn.us/sites/default/files/wq-strm4-59k.pdf MS4 General Permit]. The MPCA does this through compliance audits. To find out more information about the audit process see the pages below:
*[[Phase II MS4 audit process]]
+
*[https://stormwater.pca.state.mn.us/index.php?title=General_Stormwater_Program_Management General Stormwater Program Management - Examples for tracking activities in your SWPPP] <pre>THIS PAGE COULD BE WORKED INTO THE MAIN PAGE AND DELETED</pre>
*[[Self-audit guidance for Phase II MS4s]]
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*[https://stormwater.pca.state.mn.us/index.php?title=Phase_II_MS4_audit_process Phase II MS4 Audit Process]
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*[https://stormwater.pca.state.mn.us/index.php?title=Self-audit_guidance_for_Phase_II_MS4s Self-Audit Guidance for Phase II MS4s]
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<br>
  
==MPCA MS4 technical assistance==
+
==MPCA MS4 Technical Assistance==
*[https://www.pca.state.mn.us/water/municipal-stormwater-ms4#guidance-and-bmps-da807a70 MPCA MS4 website]
 
*[https://stormwater.pca.state.mn.us/index.php?title=MS4_staff_contact_information_and_staff_assignments MPCA MS4 staff contact information]
 
*[[MS4 case studies]]
 
*[[MS4 webinars and videos]]
 
 
*[[2017 MS4 Technical Assistance and Outreach Needs Survey Results]]
 
*[[2017 MS4 Technical Assistance and Outreach Needs Survey Results]]
 +
*[https://stormwater.pca.state.mn.us/index.php?title=MS4_case_studies MS4 Case Studies]
 +
*[https://stormwater.pca.state.mn.us/index.php?title=MS4_webinars_and_videos MS4 Webinars and Videos]
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*[https://stormwater.pca.state.mn.us/index.php?title=MS4_staff_contact_information_and_staff_assignments MPCA MS4 Staff Contact Information]
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*[https://www.pca.state.mn.us/water/municipal-stormwater-ms4#guidance-and-bmps-da807a70 MPCA MS4 Website]
 +
<br>
  
==Other resources and documents==
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==Other Resources and Documents==
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*[https://stormwater.pca.state.mn.us/index.php?title=Aaron_test_ms4_acknowledgements Acknowledgements to Contributors] <pre>PAGE NEEDS TRANSFERRANCE</pre>
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*[https://stormwater.pca.state.mn.us/index.php?title=Aaron_test_ms4_photo_library MS4 Outreach Photo Library] <pre>PAGE NEEDS TRANSFERRANCE</pre>
 +
*[https://youtu.be/xx1pgugfXeU MS4 Program Overview and Minimum Control Measures (MCM) Descriptions - YouTube Video]
 +
*[https://stormwater.pca.state.mn.us/index.php?title=Pond,_lake,_and_wetland_inventory Pond, Lake, and Wetland Inventory]
 
*[https://www.pca.state.mn.us/sites/default/files/wq-strm1-07.pdf Stormwater and Wetlands - Planning and Evaluation Guidelines]
 
*[https://www.pca.state.mn.us/sites/default/files/wq-strm1-07.pdf Stormwater and Wetlands - Planning and Evaluation Guidelines]
 
*[https://www.pca.state.mn.us/sites/default/files/wq-strm4-28.pdf Untreated Stormwater Runoff to Lakes, Streams, and Wetlands]
 
*[https://www.pca.state.mn.us/sites/default/files/wq-strm4-28.pdf Untreated Stormwater Runoff to Lakes, Streams, and Wetlands]
*[[Pond, lake, and wetland inventory]]
 
 
[[Category:Level 3 - Regulatory/Municipal (MS4)/Guidance, outreach materials, miscellaneous information]]
 

Latest revision as of 16:49, 7 May 2024

Warning: This page is an edit and testing page use by the wiki authors. It is not a content page for the Manual. Information on this page may not be accurate and should not be used as guidance in managing stormwater.
Information: We recently updated this page and will continue to work on information about MS4 stormwater management. If you have suggestions, we welcome comments using the comment box at the bottom of most pages in the manual.
Information: NOTE: Minnesota uses the term Stormwater Pollution Prevention Program (SWPPP) for MS4 stormwater, while several states and EPA may use the term Stormwater Management Plan (SWMP). These terms refer to the same thing.
icon for MS4 stormwater

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 and the MS4 program is to help mitigate the impact.

Background Information


2020 MS4 General Permit


MS4 Stormwater Permit


Previous Permits


Minimum Control Measures

When seeking to manage a Municipal Storm Sewer System (MS4), an effective Stormwater Pollution Prevention Program (SWPPP) has six different components known as Minimum Control Measures (MCMs).

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Total Maximum Daily Loads (TMDLs)

Total Maximum Daily Loads (TMDLs) are EPA approved amounts of pollutant loading that can occur and have a water body meet water quality standards. Follow this link to learn more about them along with guidance and resources.

Tools and Resources

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MS4 Audit Guidance

The U.S. Environmental Protection Agency (EPA) mandates the Minnesota Pollution Control Agency (MPCA) to evaluate MS4 permittees for compliance with the MS4 General Permit. The MPCA does this through compliance audits. To find out more information about the audit process see the pages below:


MPCA MS4 Technical Assistance


Other Resources and Documents

This page was last edited on 7 May 2024, at 16:49.