Storm Water Pollution Prevention Plan (SWPPP)
Municipal Separate Storm Sewer Systems (MS4s) are required to develop and implement a Stormwater Pollution Prevention Plan (SWPPP) to reduce the discharge of pollutants from their storm sewer system to the maximum extent practicable. The SWPPP must cover six minimum control measures: Public Education & Outreach, Public Participation/Involvement, Illicit Discharge Detection & Elimination, Construction Site Runoff & Control, Post-Construction Stormwater Management, Pollution Prevention/Good Housekeeping.
The MS4 must identify best management practices (BMPs) and measurable goals associated with each minimum control measure. An annual report on the implementation of the SWPPP must be submitted each year. (excerpted from MPCA).
The Minnesota Pollution Control Agency (MPCA) issued coverage under the Small Municipal Separate Storm Sewer System MNR04000 (MS4 General Permit) to the Prior Lake-Spring Lake Watershed District MS4, effective October 15, 2021. The General Permit expires at midnight on November 15, 2025.