The Indiana Department of Environmental Management (IDEM), under the direction of the United States Environmental Protection Agency (EPA), has designated St. Joseph County as a regulated Municipal Separate Storm Sewer System or MS4.

Regulated MS4's are required to develop and implement a Stormwater Quality Management Plan (SWQMP). The SWQMP is a comprehensive document that addresses stormwater quality, within the designated area, that includes methods and measurable goals with the following Minimum Control Measures (MCMs):

  • Public Education and Outreach
  • Public Participation and Involvement 
  • Illicit Discharge Detection and Elimination
  • Construction Site Stormwater Runoff Control
  • Post-Construction Stormwater Runoff Control
  • Municipal Operations Pollution Prevention and Good Housekeeping
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