New Hampshire NPDES Permits

This page contains information on EPA New England issued individual facility-specific permits and general permits that cover multiple facilities within a specific category and geographic area.

Authorization: In New Hampshire NPDES permits are issued by EPA New England.

This web site includes only documents that are currently available electronically. Specific individual permits may include additional attachments and supporting documentation that are not available electronically. As required by law, EPA maintains an administrative record for each permit it issues at our regional office. To view the administrative record (the legally binding hard copy of the permit) or to obtain hard copies of additional attachments for a specific permit please contact:

Richard Carvalho ([email protected])
617-918-1546

• Permits of Significant Interest
• Draft General Permits
• Final General Permits

• New Hampshire Draft Individual Permits
• New Hampshire Final Individual Permits
• EPA NPDES Permit Forms & Attachments for New England
• NPDES Water Permit Program in New England
  • CT NPDES Permits | ME NPDES Permits | MA NPDES Permits | RI NPDES Permits | VT NPDES Permits
• NPDES Stormwater Permit Program in New England
• View NPDES Permits for All States

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Permits of Significant Interest

• Merrimack Station Final NPDES Permit
• Draft New Hampshire Small MS4 General Permit

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Draft General Permits

• Region 1 Draft New Hampshire Medium Wastewater Treatment Facility General Permit
  Comment period: 11/13/2024 - 01/13/2025
• 2023 Draft Non-Contact Cooling Water General Permit (NCCW GP)
  Public comment period closed.
• Region 1 Draft Aquaculture General Permit (AQUAGP)
  Public comment period closed.
• Draft 2018 Hydroelectric Generating Facilities General Permit (HYDROGP)
  Public comment period closed.
• Draft 2016 Pesticide General Permit (PGP) for Discharges from the Application of Pesticides
  Public comment period closed.
• Draft New Hampshire Small MS4 General Permit
  Public comment period closed.

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Final General Permits

• 2024 Final Non-Contact Cooling Water General Permit (NCCW GP)
  The final Non-Contact Cooling Water General Permit was signed and effective on April 18, 2024.
  • 2014 Noncontact Cooling Water General Permit (NCCW GP) (2019 Update for Permittees)
• 2023 Final Potable Water Treatment Facility General Permit (PWTF GP)
  The final Potable Water Treatment Facility General Permit was signed on July 24, 2023 and the effective date is October 1, 2023.
  • 2017 & 2009 Potable Water Treatment Facility General Permit (PWTF GP)
• 2023 Final Hydroelectric Generating Facilities General Permit for Facilities in Massachusetts and New Hampshire (HYDROGP)
  The final Hydroelectric Generating Facilities General Permit was signed on February 14, 2023 and the effective date is April 15, 2023.
  • 2009 Hydroelectric Generating Facilities General Permit (HYDROGP)
• Final 2022 Dewatering and Remediation General Permit (DRGP)
  The final DRGP was signed August 2, 2022 and is fully effective as of August 31, 2022.
• 2021 Small Wastewater Treatment Facilities General Permit (Small WWTF GP)
• 2021 Region 1 Final Aquaculture General Permit (AQUAGP)
• Construction General Permit (CGP): 2022 | 2017 | 2012 | 2008
• Multi-Sector General Permit (MSGP): 2021 | 2015 | 2008
• 2020 Great Bay Total Nitrogen General Permit (GBTN GP)
• 2017 New Hampshire Small MS4 General Permit
• 2017 Remediation General Permit (RGP)
• 2015 Dewatering General Permit for Massachusetts and New Hampshire
• 2014 Small Vessel General Permit (sVGP)
• 2013 Vessel General Permit (VGP)
• 2011 Publicly Owned Treatment Works General Permit (POTW GP)