Stormwater Policies & Guidance

US EPA Stormwater Program Links

  • US EPA - General NPDES Information

    The National Pollutant Discharge Elimination System (NPDES) permit program controls water pollution by regulating point sources (pipes, ditches, drains, etc.) that discharge pollutants into waters of the United States. Massachusetts is not currently delegated by EPA to issue NPDES permits, but is initiating the process to develop a stormwater management program in accordance with NPDES and the Clean Water Act.

  • US EPA: NPDES Permits in New England - Regulated Communities in Massachusetts

    Interactive map of communities in Massachusetts with EPA NPDES permits. 

  • US EPA: Updated Information about EPA's Extension of the 2003 MS4 Permit

    Status of revisions to Massachusetts' Small MS4 General Permits. The 2003 MS4 General Permit remains administratively in force until new permits are issued.

  • US EPA Construction General Permit

    Coverage under the CGP is required for stormwater discharges from construction sites disturbing one or more acres of land or smaller sites that are part of a common plan of development or sale. The 2017 Construction General Permit took effect on February 16, 2017.

  • US EPA Multi Sector General Permit (MSGP)

    The MSGP provides coverage for the following types of discharges: stormwater discharges associated with industrial activity for any primary industrial activities and co-located industrial activities; discharges designated by EPA as needing a stormwater permit; discharges that are not otherwise required to obtain NPDES permit authorization but are mixed with discharges subject to the MSGP; and stormwater discharges from facilities subject to any of the national stormwater-specific effluent limitations guidelines. The current version of the MSGP was issued on June 4, 2015.

  • Best Management Practices (BMP's)

    EPA's resources for Stormwater BMPs.

  • NPDES Stormwater Notices of Intent

    Online viewer for 2008 Construction General Permit and Multi-Sector General Permit Notices of Intent.

Construction Disturbing One or More Acres

Discharges from Small Municipal Separate Storm Sewer Systems (MS4s)

Industrial Activity

New Construction and Reconstruction in or near Wetlands

  • Summary of 2008 Stormwater Revisions  pdf format of Summary of 2008 Stormwater Revisions
doc format of                             Summary of 2008 Stormwater Revisions

    Summary of revisions to the Wetlands Protection Act Regulations (310 CMR 10.00) and the Water Quality Certification Regulations (314 CMR 9.00), promulgated in January 2008, updating provisions and applicability of the Massachusetts Stormwater Management Standards.

  • Water Resources Regulations & Standards

    Regulations and standards governing the protection of water resources in Massachusetts.

  • Wetlands Protection Act, MGL Ch. 131 s.40

    Text of the Massachusetts Wetlands Protection Act. NOTE: this is an unofficial version of the text. Official copies can be obtained from the State Bookstore.

Surface Water Discharges

Surface Water Discharges to Outstanding Resource Waters (ORWs)

Endangered Species Guidance

Historic Properties

Mosquito Control

Public Education

TMDLs (Total Maximum Daily Loads)