An official website of the United States government.

Due to a lapse in appropriations, EPA websites will not be regularly updated. In the event of an environmental emergency imminently threatening the safety of human life or where necessary to protect certain property, the EPA website will be updated with appropriate information. Please note that all information on the EPA website may not be up to date, and transactions and inquiries submitted to the EPA website may not be processed or responded to until appropriations are enacted.

We've made some changes to 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.

Dewatering General Permit (DGP) for Massachusetts & New Hampshire

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 may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.

EPA Contacts

Suzanne Warner (, 617-918-1383
Newton Tedder (, 617-918-1038

State Contacts

Jennifer Wood (

Dennis Greene (

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.

Notices of Intent: Dewatering General Permit
City / Town, State Site / Address Permit Number Date Terminated Date Issued Date Posted
Babson Park, MA Babson Commons at Horn Library (PDF) (69 pp, 4.5 MB) MAG070463   12/20/2018 12/11/2018
Mashpee, MA 59 Nick Trail (PDF) (65 pp, 4.5 MB) MAG070462   11/29/2018 11/21/2018
Boston, MA The Elizabeth Stone House (PDF) (83 pp, 5.1 MB) MAG070461   11/26/2018 11/14/2018
Brockton, MA Brockton Enterprise Garage (PDF) (33 pp, 4.1 MB) MAG070460   11/20/2018 11/08/2018
Weymouth, MA Smelt Brook Culvert (PDF) (53 pp, 7.3 MB) MAG070459   11/08/2018 11/01/2018
Weymouth, MA Smelt Brook Culvert (PDF) (53 pp, 6.7 MB) MAG070458 11/08/2018 09/20/2018 09/11/2018
Worcester, MA Whitla Drive Pump Station (PDF) (39 pp, 4.3 MB) MAG070457   03/05/2018 02/23/2018
Wrentham, MA Route 1 (Washington Street) (PDF) (85 pp, 32.7 MB) MAG070456   02/13/2018 02/05/2018
Boston, MA Chestnut Hill Gatehouse No. 1 (PDF) (12 pp, 3.9 MB) MAG070455   02/05/2018 01/29/2018
Concord, MA Umbrella Community Arts Center (PDF) (67 pp, 6.2 MB) MAG070454   12/12/2017 12/01/2017
Nantucket, MA Cumberland Farms Store #2280 (PDF) (93 pp, 8.4 MB) MAG070453 01/08/2018 10/10/2017 09/25/2017
Easton, MA Easton Mobile Homes Sewer Repair (PDF) (47 pp, 10.1 MB) MAG070452   08/23/2017 08/11/2017
Buckland, MA Gardner Falls Hydroelectric Facility (PDF) (10 pp, 1.6 MB) MAG070450   07/11/2017 06/13/2017
Rowe, MA Bear Swamp Substation (PDF) (8 pp, 7.5 MB) MAG070449   05/10/2017 03/08/2017
Boston, MA Salerno Place (PDF) (5 pp, 970 K) MAG070448     03/07/2017
Boston, MA 46 - 88 Wareham Street (PDF) (19 pp, 18.5 MB) MAG070445   03/31/2017 01/18/2017
Boston, MA 110 Broad Street (PDF) (20 pp, 3.1 MB) MAG070439 10/18/2017 03/31/2017 01/06/2017
South Boston, MA I-90 Tunnel Remediation (PDF) (64 pp, 5.7 MB) MAG070444   01/26/2017 12/15/2016
Cambridge, MA 121-139 First Street Dewatering Project (PDF) (181 pp, 6.2 MB) MAG070443   01/26/2017 11/29/2016
Milford, MA 445 Main Street (PDF) (34 pp, 7 MB) MAG070441   03/31/2017 11/15/2016
Cambridge, MA EQR - 249 Third Street, LLC (PDF) (72 pp, 19.4 MB) MAG070442 10/30/2018 02/02/2017 11/02/2016
City / Town, State Site / Address Permit Number Date Terminated Date Issued Date Posted