Calendar of Events


  • 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.

  • Clean Water Act

    The Federal Clean Water Act is the legal framework for the NPDES Permit Program, providing the statutory basis for the program and the basic structure for regulating the discharge of pollutants from point sources to waters of the United States. The Act requires anyone who wants to discharge pollutants to first obtain an NPDES permit. This US EPA page summarizes the Clean Water Act and links to further information about it, including the full text of the Act.

Massachusetts Regulations

  • 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.

  • MassDEP to Review Recent Studies on Precipitation Rates in Massachusetts  pdf format of MassDEP to Review Precipitation-Rate Studies
doc format of                             MassDEP to Review Precipitation-Rate Studies

    As part of the Commonwealth's climate-change resiliency effort, MassDEP is evaluating the most recent precipitation-frequency statistics from the National Oceanic and Atmospheric Administration, with the goal of updating the Wetlands regulations (310 CMR 10.00) to accommodate the use of newer data in the wetlands permitting process. These statistics apply to stormwater peak runoff rates, calculation of 10-year floodplains, and isolated lands subject to flooding. In the interim, existing values from the US Weather Bureau Technical Paper 40 (TP40) should continue to be used. November 2015.

Stormwater Permit Forms

Surface Water Discharge (NPDES) General Permits

Cross-Permit Guidance

  • Stormwater Programs

    Both MassDEP and US EPA regulate stormwater in Massachusetts. In addition, municipalities may have local drainage, sewer, wetland, or other ordinances that regulate stormwater.

  • How an NPDES Stormwater General Permit Works

    A stormwater general permit is both a permit and a handbook for compliance. Each general permit has a preamble (or fact sheet) that summarizes the factual, legal, methodological, and policy questions considered in drafting the permit. The information in the fact sheet often helps the reader better understand the intent of the provisions in the permit.

  • NPDES Stormwater Notices of Intent

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

  • NEIWPCC (New England Interstate Water Pollution Control Commission)

    NEIWPCC is an interstate agency charged with fostering strategic cooperation for water management and water-resource protection among the six New England states and New York, providing training and certification for environmental professionals as well as educating the public on environmental protection issues.

Construction General Permit

Municipal Separate Storm Sewers

Multi-Sector General Permit

Stormwater Permitting as it Pertains to the Wetlands Protection Act

  • Green Roofs & Stormwater Management

    Green roofs are just one component that may be used to achieve Leadership in Energy and  Environmental Design (LEED) certification for new and existing buildings, as they reduce stormwater runoff and promote energy savings.

  • Massachusetts Stormwater Handbook

    Revised and updated in February 2008 in accordance with revisions to the Wetlands regulations, 310 CMR 10.00, and the Water Quality Regulations, 314 CMR 9.00, relating to stormwater.

Local Permitting Assistance

Presentations from Stormwater Workshops