We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

NPDES Stormwater Permit Program in New England

You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more.

The Clean Water Act authorizes EPA and states, which are delegated the authority by EPA, to regulate point sources that discharge pollutants into waters of the United States through the National Pollutant Discharge Elimination System (NPDES) permit program. So-called "point sources" are generated from a variety of municipal and industrial operations, including treated wastewater, process water, cooling water, and stormwater runoff from drainage systems. The NPDES Stormwater Program, in place since 1990, regulates discharges from municipal separate storm sewer systems (MS4s), construction activities, industrial activities, and those designated by EPA due to water quality impacts.

Administration

Top of Page


Large & Medium MS4 Permits

Top of Page


Small MS4 Program

2003 Permit for MA and NH

Permit Reissuance

  • Updated Information for Reissuance of the Small MS4 General Permit
  • Which New England communities are regulated?

    New England Municipalities Regulated by the Phase II Stormwater Program

    Choose a state from the list below to view municipalities* whose MS4s are automatically-designated (either in full or part) by the Phase II Rule based on urbanized area (PDF) (3 pp, 264 K) delineations from the 2000 U.S. Census. In addition to MS4s automatically regulated by the Phase II Rule, EPA and authorized states may designate additional municipalities for permit coverage, and others may be eligible for waivers from permitting requirements. For the states of Massachusetts and New Hampshire, where EPA is the NPDES permitting authority, Notices of Intent (NOIs), annual reports, and public notice information is provided.

    *Note: Those portions of a municipality's MS4 that discharge to a combined sewer system or a publically owned treatment works (POTW) are not regulated by the Phase II Rule, regardless of coincidence with an urbanized area. If and when storm sewers are separated from sanitary sewers pursuant to state and federal Combined Sewer Overflow Policies, the resulting MS4s would then become automatically-designated by the Phase II Rule.

  • General Permit for Storm Water Discharges from Small Municipal Separate Storm Sewer Systems (MS4s)
  • Notices of Intent (NOIs) (Pending)
    • Massachusetts
    • New Hampshire
  • Public Notice Status and Processing NOIs (Pending)
  • Permit Annual Reporting Requirements (Pending)
  • Permit Annual Reports (Pending)
    • Massachusetts
    • New Hampshire

Top of Page


Construction Activities

Top of Page


Industrial Activities

Top of Page


Residual Designations

The Clean Water Act (CWA) and related regulations define the specific industrial and municipal stormwater sources that must be authorized by an NPDES permit. The CWA recognizes that other sources, such as commercial properties, may need to be regulated on a case-by-case or category-by-category basis based on additional information or localized conditions. The authority to regulate other sources based on the localized adverse impact of stormwater on water quality through NPDES permits is commonly referred to as the "Residual Designation" authority. In 2008, EPA issued records of decision requiring additional NPDES stormwater permits in specific areas within the Charles River watershed in Massachusetts and the Long Creek watershed in Maine. In July 2013, Conservation Law Foundation, Natural Resources Defense Council, and American Rivers filed a petition in Regions 1,3 and 9 seeking EPA to make a determination that commercial, industrial and institutional sites contribute to violations of water quality standards and require NPDES permits. In March 2014, EPA released a response to the petition. Additional information is provided via the links below.

Top of Page


Stormwater BMP Tools and External Resources

Top of Page