Check out WRP's GIS data layers


In compliance with the Maine Department of Environmental Protection's General Permit for the Discharge of Stormwater from Small Municipal Separate Storm Sewer Systems (MS4), the City updated our Stormwater Management Plan (SWMP). Please see the City Clerk to review a printed copy of the SWMP at City Hall. 


Collection Systems Division Annual Report for FY2021-22

Check out the annual report for our Collection Systems Division, which provides vital services to maintain all municipally-owned piped infrastructure in the City.


2022 MS4 General Permit Now in Effect

The Maine Department of Environmental Protection's Municipal Separate Storm Sewer System ("MS4") General Permit went into effect on 7/1/22.  There are several new provisions that provide more protection for water resources.  Some of these provisions include:

  • Conduct analytical water quality monitoring for stormwater outfalls to determine if prohibited discharges are occurring.
  • Remove verified prohibited stormwater discharges within 60 days of discovery (or develop an expeditious mitigation plan if removal within 60 days is infeasible).
  • Establish an Erosion & Sediment Control Ordinance or other regulatory mechanism to minimize sediment discharge from construction projects by 7/1/23.
  • Establish a Low Impact Development Ordinance or other regulatory mechanism to provide more stormwater treatment for redevelopment and new development projects by 7/1/24.

For more information please review the City's Stormwater Management Plan and/or contact the Stormwater Program Coordinator.


COVID-19 Continuity of Services Assurance Statement 


DEP Reminds Mainers of What Not to Flush



Committed to safeguarding the health of South Portland's watersheds and Casco Bay by providing cost-effective & efficient water resource protection services


Trout Brook Nature Preserve


111 Waterman Drive (Water Resource Recovery Facility)

1142 Highland Avenue (Collection System Division)

767-7675 - Telephone 767-5697 - Fax Monday-Friday 7:00 a.m. - 3:30 p.m.