Stormwater Management Program (SWMP)
The Oakland County Water Resources Commissioner's (WRC) Environmental Team coordinates, implements and manages programs to protect and restore Oakland County's rivers, lakes and streams. The flow of water doesn't recognize political boundaries; therefore, the WRC works with communities and other stakeholders to protect the waterways.
The WRC is responsible for more than 500 miles of drainage systems that are called County Drains.
Many communities in Michigan, including Oakland County, are required to have a stormwater permit from the Michigan Department of Environment, Great Lakes and Energy (EGLE, formerly the DEQ). This requirement is part of the Federal Clean Water Act and is referred to as the Phase II stormwater permit. The Environmental Team coordinates Phase II compliance activities for Oakland County as part of the Oakland County Stormwater Committee. Other Oakland County departments who have responsibility for Phase II activities include Facilities Management, Health Division, Parks and Recreation, Planning and Economic Development Services, Road Commission for Oakland County, and Waste Resource Management.
For more information on the Environmental Team and what they can do for you, or to provide input on the County's Stormwater Management Program, please email envreq@oaklandcountymi.gov.
Learn more about our New Stormwater Engineering Design Standards
MS4 Permit Information
- Oakland CDC MS4 Permit Public Notice - March 2026
- Oakland CDC DRAFT MS4 Permit - March 2026
- MS4 Stormwater Management Activities Table
MS4 Permit-related Documents
- OC MS4 IDEP Activities Spreadsheet
- OC MS4 Illicit Discharge Elimination Plan
- Appendix A - Oakland County Facility Listing
- Appendix B - Oakland County Facilities and Urbanized Areas Map
- Appendix C - OCFM MS4 Outfall and Discharge Point Summary
- Appendix C - OCPRC MS4 Outfall and Discharge Point Summary
- Appendix C - WRC MS4 Outfall and Discharge Point Summary
- Appendix D - WRC Work Instruction CDM-0415, "Drain Inspection, Maintenance and Cleaning"
- Appendix D - WRC Work Instruction EU-1702, "Procedures for Illicit Discharge Detection and Elimination"
- Appendix D - OCPRC "Illicit Discharge Elimination Program Guidelines"
- Appendix E - WRC Work Instruction EU-1700, "Surface Water Pollution Complaints"
- Appendix E - OCPRC "Surface Water Pollution Response"
- Appendix F - WRC 24-Hour Pollution Hotline Brochure
- Appendix G - IDEP Handout
- Appendix H - WRC Procedure, P-043, "Spill Response Procedure"
- Appendix I - WRC Alternative IDEP
- Attachment 1 - County Drain 5-Year Inspection Cycle
- Attachment 2 - List of Prioritized WRC Drains for IDEP Investigation and DWS Activities
- Attachment 3 - WRC CDM Inspection Forms
- OC MS4 P-CRCP Activities Spreadsheet
- Stormwater Engineering Design Standards - Updated as of April 2025
- OC MS4 PPGH Activities Spreadsheet
- OC MS4 Stormwater Structural Controls Procedure
- OC MS4 - OCFM Municipal Inventory and Assessment
- OC MS4 - OCPRC Municipal Inventory and Assessment
- OC MS4 - WRC Municipal Inventory and Assessment
- OC MS4 - OCFM Standard Operating Procedure Summary
- OC MS4 - OCPRC Standard Operating Procedure Summary
- OC MS4 - WRC Standard Operating Procedure Summary
- OC MS4 - OCFM Municipal Operations and Maintenance Activities Procedure
- OC MS4 - OCPRC Municipal Operations and Maintenance Activities Procedure
- OC MS4 - WRC Municipal Operations and Maintenance Activities Procedure