Best Management Practices

Under the general permit, small MS4s must develop, implement and enforce a program that includes the following "six minimum control measures":

  • Public education and outreach on stormwater impacts
  • Public involvement and participation
  • Illicit discharge detection and elimination
  • Construction site stormwater runoff control
  • Post-construction stormwater management in new development and redevelopment
  • Pollution prevention/good housekeeping for municipal operations

Municipal Separate Storm Sewer Systems (MS4) Permits