Stormwater Management Information for the Town & Public (NPDES MS4 Permit)

The National Pollutant Discharge Elimination System (NPDES) permit program, created in 1972 by the Clean Water Act (CWA), helps address water pollution by regulating point sources that discharge pollutants into the waters of the United States. Under the CWA, the United States Environmental Protection Agency (EPA) authorizes the NDPES permit program to individual state governments, enabling them to perform the permitting, administrative, and enforcement aspects of the NPDES program.

In compliance with the provisions of the CWA and the Massachusetts Clean Waters Act (MCWA), the Town of Marion is authorized to discharge stormwater in accordance with the conditions and the requirements of the EPA's NPDES permit program and the General Permit for Stormwater Discharges from Small Municipal Separate Storm Sewer System in Massachusetts (MS4 General Permit).

The following documents have been prepared for the Town of Marion in compliance with the requirements of the EPA's NPDES Permit Program and MS4 General Permit.

Stormwater Management Program (SWMP)

The SWMP describes and details the activities and measures that are implemented to meet the terms and conditions of the MS4 General Permit. The SWMP is available for public review and comment. Click here to view the SWMP. All public comments will be taken under advisement. Please Email Meghan Davis any comments to Meghan Davis, Town of Marion Engineering Manager.

Annual Reports

Permittees are required to submit annual reports for the MS4 General Permit term. The reporting period is July 1st through June 30th of the following year, and the annual report is due ninety days from the close of each reporting period. The annual reports include the following information: self-assessment review of compliance with the permit terms and conditions, assessment of the appropriateness of the selected Best Management Practices (BMPs), the status of any required plans or activities, assessment of the progress towards achieving the measurable goals and objectives of each control measure, outfall screening and monitoring data collected during the reporting period, description of activities for the next reporting period, description of any changes in identified BMPs or measurable goals, and description of activities undertake by any entity contracted for achieving any measurable goal or implementing any control measures. Town of Marion annual reports

Illicit Discharge Detection and Elimination Plan (IDDE)

Permittees are required to implement an IDDE program to systematically find and eliminate sources of non-stormwater discharges to its municipal stormwater collection system and implement procedures to prevent such discharges. The Town of Marion IDDE Plan has been prepared to address this requirement. Click here to view the Town of Marion IDDE plan.

Notice of Intents (NOIs)

Permittees who are authorized to discharge to the Waters of the United States in accordance with the MS4 General permit requirements must submit a NOI for those discharge sources. Two MS4 discharge sources were identified within the Town of Marion: the Department of Public Works (DPW) Maintenance Garage and the Water Pollution Control Facility (WPCF).

Educational Information

The following documentation includes information on how the public can assist with MS4 General Permit compliance.



Informational Links

Water Cycle Information