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NPDES Permits in New England

Potable Water Treatment Facility General Permit

The Notice of Availability of the draft NPDES General Permit for Discharges from Potable Water Treatment Facilities in Massachusetts (MAG640000) and New Hampshire (NHG640000) was published in the Federal Register on August 10, 2016. Public comments will be accepted until 30 days after the aforementioned Federal Register publication date.

Comments may be sent to:
PWTF GP Coordinator
EPA – Region I
Office of Ecosystem Protection
5 Post Office Square, Suite 100
Mail Code OEP06-1
Boston, MA 02109-3912

NOI Processing: Olga Vergara (vergara.olga@epa.gov); telephone: 617-918-1519; Mail Code OEP06-4

Technical Questions: Thelma Murphy (murphy.thelma@epa.gov); telephone: 617-918-1615; Mail Code OEP06-1

This General Permit replaces the previous PWTF GP that expired on October 2, 2014. It provides coverage for potable water treatment facilities in Massachusetts and New Hampshire that discharge wastewater from one or more of the following treatment processes: Clarification, Coagulation, Media Filtration, Membrane filtration (not including reverse osmosis), and Disinfection. In general, facilities covered under this General Permit must discharge less than or equal to 1.0 million gallons per day (MGD).

The 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 Permit are discussed in Part 1 of the permit.

Once the General Permit is finalized, operators (including those facilities covered under the PWTF GP that expired on October 2, 2014) must submit a complete and accurate NOI containing the information in Appendix IV to both EPA – Region I and the appropriate state agency, where applicable. Refer to Part 4.3 of the permit and Appendix IV for additional details. EPA and the State (when applicable) will review the NOI and the facility will receive written notification from EPA stating whether permit coverage and authorization to discharge under the General Permit is approved.

Copies of the Draft PWTF GP, Fact Sheet, and Appendices are available from the web links below.

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

State Contacts


  • Bob Kubit (Robert.Kubit@state.ma.us), 508-767-2854


Notices of Intent

Notices of Intent (NOI) will be posted on this page for a minimum of 30 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.

NOIs older than 30 days are listed in the PWTFGP NOI archive.

State Town/City Name of Facility Date Posted

2009 Potable Water Treatment Facility General Permit (PWTF GP)

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