Control Measures

What are the six minimum control measures?

The Phase II Rule outlines a small MS4 storm water management program comprising six required program elements that, when implemented in concert, are expected to result in significant reductions of pollutants discharged into receiving waterbodies. These six elements, termed "minimum control measures," are:

  1. Public Education and Outreach
    Distributing educational materials and performing outreach to inform citizens about the impacts polluted storm water runoff discharges can have on water quality.
  2. Public Participation/Involvement
    Providing opportunities for citizens to participate in program development and implementation, including effectively publicizing public hearings and/or encouraging citizen representatives on a storm water management panel.
  3. Illicit Discharge Detection and Elimination 
    Developing and implementing a plan to detect and eliminate illicit discharges to the storm sewer system (includes developing a system map and informing the community about hazards associated with illegal discharges and improper disposal of waste).
  4. Construction Site Runoff Control
    Developing, implementing, and enforcing an erosion and sediment control program for construction activities that disturb 1 or more acres of land (controls could include for example, silt fences and temporary storm water detention ponds).
  5. Post-Construction Runoff Control 
    Developing, implementing, and enforcing a program to address discharges of post-construction storm water runoff from new development and redevelopment areas.  Applicable controls could include preventative actions such as protecting sensitive areas (e.g., wetlands) or the use of structural BMPs such as grassed swales or porous pavement.
  6. Pollution Prevention/Good Housekeeping 
    Developing and implementing a program with the goal of preventing or reducing pollutant runoff from municipal operations. The program must include municipal staff training on pollution prevention measures and techniques (e.g., regular street sweeping, reduction in the use of pesticides or street salt, or frequent catch-basin cleaning).

For more information, visit http://www.epa.gov/npdes/pubs/fact2-3.pdf