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Stormwater Program

Stormwater Program

The City of Saco’s Public Works, Code Enforcement, Planning, and Water Resource Recovery Departments work collaboratively within the community to manage stormwater runoff from existing sites as well as new or redeveloped sites.  The goal of these efforts is to reduce the harmful effects of stormwater runoff and eliminate illicit discharges to the natural receiving waterbodies.

MS4 Permit

Every five years, the Maine Department of Environmental Protection (MDEP) issues a state-wide General Permit to all communities designated as small Municipal Separate Storm Sewer Systems (MS4s). The MS4 designation is based on the decennial U.S. census data for "Urbanized Areas," which are generally defined as densely developed census tracts or blocks with populations of at least 50,000. (Certain non-residential urban land uses with lower populations that are linked to more densely developed cores are also listed as Urbanized Areas). The 2013-18 General Permit identifies thirty MS4 communities in Maine and requires them all to implement Minimum Control Measures (MCMs) to reduce pollution from stormwater runoff. Saco's Urbanized Area encompasses approximately half of the City’s total land area containing nearly 52 square miles.

Minimum Control Measures

State and federal regulations require more urbanized communities like Saco to implement the following six Minimum Control Measures (MCMs) to significantly reduce the discharge of pollutants into local waterways. The City is required to develop a detailed Stormwater Program Management Plan that describes how each of the MCMs will be implemented over the five year permit period. Each of these MCMs is targeted towards specific audiences and activities as briefly described below. Additional information can be found on the EPA website here.

MCM1. Public Education and Outreach: distribute educational materials and conduct public outreach to inform citizens about the impacts polluted stormwater on receiving water quality.

MCM2. Public Participation and Involvement: provide opportunities for citizens to participate in stormwater management program development and implementation.

MCM3. Illicit Discharge Detection and Elimination: develop and implement an enforceable plan to conduct routine inspections of stormwater systems to eliminate illicit pollutant discharges to receiving waters.

MCM4. Construction Site Runoff Control: develop and implement an enforceable plan to minimize sediment transport to receiving waters from construction activities disturbing more than 1 acre of land.

MCM5. Post-Construction Runoff Control: develop and implement an enforceable program to minimize polluted stormwater runoff to receiving waters from new development or redevelopment projects.

MCM6. Pollution Prevention and Good Housekeeping: develop and implement a training program to minimize stormwater pollution from municipal activities.

Related documents:

Non-Stormwater Discharge Ordinance, City Code Chapter 176 – Sewers, Part 4

Additional Links:
Goosefare Brook Watershed 
Think Blue Maine 


Maine DEP Stormwater Program
Maine YardScaping
The Clean Water Act
Cumberland County Soil & Water Conservation District
Low Impact Development Center