Local Government, MS4 Programs

Overview of Stormwater Management Program Requirements

Additional Resources for Local Governments
Annual Report Forms
Department Regional and Satellite Offices

MS4 Program Funding Guidance
Regulated MS4s in Missouri
Small MS4 General Permit MO-R040000
Stormwater Internet Map Viewer
Watershed and Partner Organizations

Certification Programs for Managers

APWA Certified Stormwater Manager Program
MS4 Operator Certification Program - EnviroCert International

Overview of Stormwater Management

The national and state stormwater regulations now require certain small communities to obtain a National Pollutant Discharge Elimination System, also known as NPDES, permit. Missouri has three Phase I communities: – Kansas City, Independence and Springfield.  In addition, there are approximately 164 Missouri communities affected by these Phase II Stormwater regulations  These small communities with Municipal Separate Storm Sewer Systems, also known as MS4s, were required to obtain a NPDES permit by March 10, 2003  The permit requires these regulated MS4s to have their stormwater management program in place within five years from the date of initial permit issuance.  The program must address six minimum control measures  The larger metropolitan areas such as Kansas City, Springfield and Independence became regulated under the 1990 Phase I regulations  The Metropolitan St. Louis Sewer District successfully petitioned on behalf of the City of St. Louis to be regulated under Phase II.

Affected Missouri Communities

Medium and large MS4s are required to seek coverage under a NPDES permit. (Generally, populations 100,000+.) Refer to state regulation 10 CSR 20-6.200 and 40 CFR 122.26(d) for application requirements for medium and large MS4s.  See Application Form A below.

Small MS4s are required to seek coverage under a NPDES permit and develop a stormwater management program. (Generally, populations between 1,000 and 10,000 if within an urbanized area, and other populations between 10,000 and 100,000.) Refer to state regulation 10 CSR 20-6.200 and 40 CFR 122.34 for application requirements for small MS4s. See Application Forms K, L & M below.

Missouri Regulated MS4s

Metropolitan St. Louis Sewer District and its 60 co-permittees

Federal Criteria for Determining Which Communities are Affected

U.S. Environmental Protection Agency (EPA) Who’s Covered Fact Sheet
EPA Urbanized Area Fact Sheet (EPA 833-F-00-004)
Missouri populations as defined by U.S. Census Bureau
Missouri's Nine Urbanized Area Reference Maps 2010 as defined by U.S. Census Bureau:

Permit Options and Reporting Requirements

The department issued a statewide general permit MO-R040000 for Phase II MS4s on March 10, 2003.  This general permit lists requirements for minimum control measures, reporting and monitoring.

Large and medium (Phase I) MS4 permit applications:

Form A - Application for Construction or Operating Permit, Form--MO 780-1479 (07/08)
Instructions for Phase I application submittal per 40 CFR 122.26(d)

Small (Phase II) MS4 permit applications for the general permit.

Form K Application MO 780-1802 for Small Individual MS4 (must be accompanied by Form M)
Form L Application MO 780-1801 for Co-permittee Small MS4 General Permit (must be accompanied by Form M)
Form M Application MO 780-1800 for Stormwater Permit under the General Permit: Small Separate Storm Sewer System (MS4) (must accompany Form K or L)

Small MS4s applying for a site-specific permit may use Forms K and M above.

Annual Reporting Forms MO 780-1846 for Small MS4s.

Stormwater Annual Report - Small MS4 Permits -- 780-1846
Stormwater Annual Report - Small MS4 Permits Addendum - Water Quality Program Assessment - 780-2049

Note icon.Note: These forms should be filled out by small MS4 permittees and returned to the department by July 28 each year.  Form 780-1846 is the main form and Form 780-2049 is the addendum to help fill out section C.2.b of form 780-1846.

EPA Program Evaluation (Audit) Guidance for Regulated MS4s

MS4 Program Evaluation Guidance January 2007 (Guide with Appendix A)— Field test version EPA-833-R-07-003
MS4 Program Evaluation Guidance January 2007 (Appendices B-D)— Field test version EPA-833-R-07-003

Stormwater Program Development for Regulated MS4s

Missouri Guide to Green Infrastructure: Integrating Water Quality into Municipal Stormwater Management, May 2012
Measurable Goals Guidance for Phase II Small MS4s Designed to help small MS4 operators comply with the measurable goals permitting requirements
Phase II Stormwater Management Plan – Metropolitan St. Louis Sewer District
Worksheets, checklists, ordinances, and more for all six Minimum Control Measures - Pennsylvania DEQ
Designing and Implementing an Effective Stormwater Management Program - American Public Works Association
Model Ordinances to Protect Local Resources - EPA (for Phase I & II communities).
Planning for Urban Watershed Protection.
Protecting Water Resources with Higher-Density Development - EPA January 2006

See additional information under each of the six minimum control measures listed below.

Six Minimum Control Measures required for Stormwater Management Program for Phase II regulated communities

EPA Six Minimum Control Measures Fact Sheets
Missouri’s Small MS4 General Permit Conditions

MS4 Program Funding Guidance

Guidance for Municipal Stormwater Funding - National Association of Flood and Stormwater Management Agencies, January 2006.  
An Annotated Bibliography of Stormwater Finance Resources - Center for Urban Policy and the Environment, April 29, 2002

Public Education and Outreach (Minimum Control Measure #1)

Public Involvement and Participation (Minimum Control Measure #2)

Illicit Discharge Detection and Elimination (Minimum Control Measure #3)

Construction Site Runoff Control (Minimum Control Measure #4)

Post-Construction Runoff Control (Minimum Control Measure #5)

Funding Considerations for Municipal Stormwater Management Programs and Post Construction Runoff Control

Ordinances and Other Regulatory Considerations for Municipal Stormwater Management Programs and Post Construction Runoff Control

Planning, Site Design and Best Management Practice Design Tools for Post Construction Runoff Control

Project Certification Programs

  • Sustainable Sites Initiative (SITESTM) Program – Project Certification and Rating System – a joint effort of the American Society of Landscape Architects, the Lady Bird Johnson Wildflower Center at The University of Texas at Austin, and the United States Botanic Garden.  To promote sustainable land development and management practices that can apply to sites with and without buildings.

Pollution Prevention and General Housekeeping in Municipal Operations (Minimum Control Measure #6)

Additional Resources for Local Governments