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Overview of MS4 Stormwater Management Program Requirements and Objectives

The MS4 Stormwater Management Program (SWMP) aims to reduce pollutants in stormwater discharges to the maximum extent practicable (MEP). This involves changing public behavior, implementing best management practices (BMPs), and ensuring compliance with six minimum control measures. Public education, participation, and illicit discharge detection are critical components. The program mandates construction site controls, post-construction management, and pollution prevention. Annual reporting and adjustments are necessary to assess effectiveness, with special provisions for larger communities and those in areas facing significant growth.

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Overview of MS4 Stormwater Management Program Requirements and Objectives

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Presentation Transcript

  1. The Basics Permit Overview

  2. Goal of Program • Reduce pollutants in discharges from the MS4 • Change Behavior • Permit Compliance

  3. Requirement Reduce pollutants in storm water discharges to the Maximum Extent Practicable (MEP) by implementing a Storm Water Management Program (SWMP)

  4. MEP • Technology standard • Dynamic

  5. SWMP • 6 Minimum Control Measures as a basis for a SWMP • BMPs to address 6 Minimum Control Measures • Measurable Goals for each BMP • Time schedules for each Measurable Goal

  6. Minimum Control Measures

  7. Public Education Requirements • Educate the public on • The impacts of storm water • The steps the public can take to reduce pollutants in storm water runoff

  8. Public Participation Requirements • Comply with State and local public notice requirements • Allow the public to review and comment on the permit and SWMP • Involve the public in the implementation of SWMP

  9. Illicit Discharge Detection and Elimination Requirements • Storm sewer system map • An ordinance prohibiting non-storm water discharges • Plan to detect and address non-storm water discharges • Educate the public on the hazards of illicit discharges

  10. Construction Site Control Requirements • An enforceable ordinance to require erosion and sediment controls at construction sites • MS4 must require construction site operators to use BMPs • Site plan and BMP review • Public comments/complaints procedures • Site inspections and enforcement procedures

  11. Post-Construction Management Requirements • An ordinance requiring long term BMPs • On-going maintenance of BMPs

  12. Pollution Prevention/Good Housekeeping Requirements • Examine municipal activities that have the potential to cause pollution in storm water • Implement BMPs to reduce that potential • Train employees

  13. Annual Reports • Have you done what you said you would do? • In light of water quality, have you seen noticeable changes? • Are the BMPs you chose effective? • Are they implemented well? • Improvements? • Reporting form

  14. Supplemental Provisions • Communities over 50,000 or subject to high growth (>25%/10 yrs) • Comply with Receiving Water Limitations • Incorporate Design Standards

  15. Receiving Water Limitations • Water Quality Standard • may require more than MEP • Objectives (http://www.swrcb.ca.gov/) • Basin Plans • California Toxics Rule • Statewide Water Quality Control Plan • Iterative Approach • Ex: San Diego - trash (floatables) in Chollas and Paleta Creeks

  16. Design Standards • Post Construction Requirements

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