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MS4 Storm Water Permit/Plan
Purpose
Under the authority of the Federal Clean Water Act and Water Pollution Control Act, the Missouri Department of Natural Resources (MDNR) has regulatory authority to require local government entities, like St. Charles County, to improve or maintain storm water quality within their boundaries. To accomplish this, the MDNR issues a permit to the County known as the Municipal Separate Storm Sewer System (MS4) Permit (PDF).
The permit establishes a 5-year plan setting out how the County will help improve the quality of impaired waters of the nation and assure that unimpaired waters remain unimpaired. The County is also required to complete a biennial report that updates the status of the county’s progress in implementing its 5-year storm water plan.
- Watch the Stormwater Management Plan presentation from the March 17, 2021 Planning & Zoning Commission meeting (begins at the 5:11:55 mark).
Requirements
The permit requires the County to address 6 Minimum Control Measures (MCM). The County's 5-year plan to address these 6 MCMs is included in the permit. Information regarding the different County staff positions that have responsibility for each measure and a prioritized schedule to address each measure are also included in the permit.
Resources
Feedback
We would like to hear your comments and suggestions regarding our Storm Water Management Plan or any other thoughts you may have for strategies to protect our waterways from pollution and erosion. Please contact the Development Review Division by email or call 636-949-1814 with any comments or suggestions you may have.
Contact Us
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Development Review Division
201 N. Second St.
Suite 410
St. Charles, MO 63301
Email
Ph: 636-949-1814
Fx: 636-949-7529
Staff Directory
Related Documents
- Draft 2021-2026 Stormwater Management Plan (PDF)
- Appendix A: Draft 2021-2026 Stormwater Management Plan Measurable Goals (PDF)
- Appendix B: Minimum Control Measures Contacts and County Facilities List (PDF)
- Appendix C: Standards of Procedure and Supplemental Documents (PDF)
- Appendix D: Post-Construction Stormwater Management Ordinance and Design Criteria (Adopted December 2020) (PDF)
- Draft 2021-2026 MOR040000 Permit (PDF)
- 6-2016–12-2016 MS4/MDNR Annual Report (PDF)
- 2015-2016 MS4/MDNR Annual Report (PDF)
- MS4/MDNR Storm Water Management Plan (SWMP) (PDF)
- 2016–2021 MS4/MDNR Storm Water Permit (PDF)