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NPDES Permits in New England

Dewatering General Permit (DGP)

Final general permit available for Massachusetts and New Hampshire

Final Dewatering General Permit (DGP)

The Notice of Availability of the Final NPDES General Permit for Dewatering Activity Discharges in Massachusetts (MAG070000) and New Hampshire (NHG070000) was published in the Federal Register on April 20, 2015.

This General Permit replaces the Dewatering General Permit (DGP) that expired on September 30, 2013. The Final General Permit provides coverage for facilities with construction dewatering of groundwater intrusion and/or storm water accumulation from sites less than one acre and short-term and long-term dewatering of foundation sumps into waters of the Commonwealth of Massachusetts and the State of New Hampshire. The Final permit establishes permit eligibility conditions, notice of intent requirements, effluent limitations, standards, prohibitions, and best management practices. The eligibility requirements for coverage under the general permits are discussed in detail under Part 3 of the draft permit. The reader is strongly urged to go to that section to determine eligibility.

Owners and/or operators of facilities with dewatering discharges, including those currently authorized to discharge under the expired General Permits, will be required to submit a Notice of Intent (NOI) to be covered by the General Permit to both EPA-New England and the appropriate state agency. EPA and the State will review the NOI and the facility will receive written notification from EPA stating whether permit coverage and authorization to discharge under one of the general permits is approved.

You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more about PDF, and for a link to the free Acrobat Reader.

EPA Contacts

Victor Alvarez (alvarez.victor@epa.gov), 617-918-1572

State Contacts


Bob Kubit (Robert.Kubit@state.ma.us)


Amy Clark (Amy.Clark@des.nh.gov)

Notices of Intent

Notices of Intent (NOI) will be posted on this page for a minimum of 7 days after EPA receives them. Please contact Olga Vergara if you have any questions regarding NOIs. See the table below for a chronological listing of NOIs. Older NOIs are listed in the Dewatering General Permit (DGP) NOI archive.

Date Posted Date Issued Date Terminated Permit Number Town/City Name of Site/Facility
06/30/2015       Brookline, MA The Growth Companies (PDF) (14 pp, 2.8 MB)
06/30/2015       Ashfield, MA Ashfield Smith Branch Road Project (PDF) (22 pp, 13.3 MB)
06/30/2015       Cambridge, MA 112-116 Mt. Auburn Street (PDF) (102 pp, 5.5 MB)
05/11/2015 05/20/2015     Southbridge, MA Dexter-Russell Penstock Infiltration Mitigation (PDF) (35 pp, 5.2 MB)

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