Revised Small Municipal Separate Storm Sewer Systems Permit

The Minnesota Pollution Control Agency (MPCA) has released its revised draft National Pollutant Discharge Elimination System (NPDES) State Disposal System (SDS) General Permit (MNR040000) for discharges of stormwater associated with Small Municipal Separate Storm Sewer Systems (MS4s). MPCA will host a public information meeting to discuss the draft MS4 General Permit on June 21, 2012, at the MPCA St. Paul office. MPCA also intends to establish an e-mail list for the purpose of providing notification to persons interested in receiving notice of the public notice dates for the Stormwater Pollution Prevention Program (SWPPP) documents submitted pursuant to the MS4 General Permit. The draft permit is open for public comment from May 21 - July 23, 2012. The MPCA is requesting written comments on the draft permit.

This MS4 General Permit was issued first in 2006 to address new federal Phase II National Pollutant Discharge Elimination System (NPDES) stormwater regulations for small MS4s. These federal rules identified an iterative process for improved stormwater management where MS4 programs are strengthened with each five year permit cycle. This current permit reissuance effort shifts from the initial focus on permit program development to measuring program implementation. The next MS4 General Permit reissuance in 2017 will need to comply with the new federal NPDES stormwater rules expected to be final in December 2012.

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