Connecticut NPDES Permits
Authorization: The state of Connecticut has assumed the NPDES program from the federal government. The state issues its permits through the Connecticut Department of Energy and Environmental Protection.
On this page:
On other pages:
- Connecticut Draft Individual Permits
- Connecticut Final Individual Permits
- EPA NPDES Permit Forms & Attachments for New England
- NPDES Water Permit Program in New England
- NPDES Stormwater Permit Program in New England
- View NPDES Permits for All States
Draft General Permits
- 2025 Draft General Permit for the Discharge of Dewatering and Remediation Wastewaters
- 2025 Draft Comprehensive General Permit for Discharges to Surface and Ground Water
- 2025 Draft General Permit for Discharge of Stormwater from Construction Activities (pdf)
- 2025 Draft General Permit for Significant Industrial User Discharges to Publicly Owned Treatment Works (pdf)
- 2025 Draft General Permit for Non-Significant Industrial User Discharges to Publicly Owned Treatment Works (pdf)
- 2025 Draft General Permit for the Discharge of Stormwater Associated with Commercial Activity (pdf)
- 2024 Draft General Permit for the Discharge of Stormwater Associated with Industrial Activities (pdf)
- 2024 Draft General Permit for Point Source Discharges to Waters of the State from the Application of Pesticides (pdf)
- 2024 Draft General Permit for the Discharge of Swimming Pool Wastewater to Surface and Ground Waters (pdf)
- 2023 Draft General Permit Discharge of Stormwater from the Connecticut Department of Transportation Separate Storm Sewer Systems (pdf)
- 2019 Draft General Permit for the Discharge of Wastewaters from Significant Industrial Users (SIU) (pdf)
- 2019 Draft General Permit for Discharges of Miscellaneous Sewer Compatible (MISC) Wastewater from Industrial Users (pdf)
- 2018 Draft Proposed General Permit for Nitrogen Discharges (pdf)
- 2018 Draft General permit for the Discharge of Wastewaters from Categorical Industrial Users to a Public Owned Treatment Works (POTW) (pdf)
- 2017 Draft General Permit for the Discharge of Low Flow Water Treatment Wastewater (pdf)
- 2016 Draft General Permit for the Discharge of Groundwater Remediation Wastewater (pdf)
- 2012 Draft General Permit to Discharge from Subsurface Sewage Disposal Systems Serving Existing Facilities (pdf)
Draft Pretreatment General Permits
Note that links in the table below open in new browser windows/tabs.
| City / Town | Applicant / Facility Name | Permit Number | Comment Period Dates |
|---|---|---|---|
| Watertown | Click Bond, Inc. (pdf) | SP0000920 | 08/23/2024 - 09/23/2024 |
| Bridgeport | Bridgeport Energy LLC (pdf) | SP0002330 | 08/21/2024 - 09/21/2024 |
| North Stonington | Lake of Isles, LLC (pdf) | SP0002408 | 05/06/2024 - 06/06/2024 |
| Bristol | Theis Precision Steel USA, Inc. (NOI Denial Notice) (pdf) | SP0002327 | 10/02/2023 - 11/02/2023 |
| Stafford Springs | 3M Purification Inc. (pdf) | SP0000060 | 12/10/2015 - 01/10/2016 |
| Woodstock | Crabtree & Evelyn, Ltd. (pdf) | SP0002299 | 12/01/2015 - 12/31/2015 |
| Danbury | Goodrich Corporation (pdf) | SP0000006 | 11/24/2015 - 12/24/2015 |
| West Haven | Enthone, Inc. (pdf) | SP0001123 | 08/05/2015 - 09/05/2015 |
| New London | Sheffield Pharmaceuticals, LLC (pdf) | SP0002442 | 08/04/2015 - 09/04/2015 |
| Bethel | Vanderbilt Chemicals, LLC (pdf) | SP0000110 | 11/26/2014 - 12/26/2014 |
| Watertown | Global Steering Systems, LLC (pdf) | SP0002182 | 10/28/2014 - 11/28/2014 |
| Newington | Beacon Industries (pdf) | SP0000624 | 06/18/2014 - 07/17/2014 |
| Stratford | Sikosky Aircraft Corporation (pdf) | SP0000551 | 05/30/2014 - 06/30/2014 |
| Mystic | Mystic Aquarium (pdf) | SP0002426 | 05/20/2014 - 06/20/2014 |
| Thomaston | Unimetal Surface Finishing, LLC (pdf) | SP0002461 | 12/13/2013 - 01/13/2014 |
| West Hartford | United Tool and Die Company (pdf) | SP0000039 | 10/16/2013 - 11/16/2013 |
| Stafford Springs | Warren Corporation (pdf) | SP0000456 | 10/01/2013 - 11/01/2013 |
| New Britain | Peter Paul Electronics Co. Inc. (pdf) | SP0000778 | 08/14/2013 - 09/12/2013 |
| Plainville | Plainville Plating Company, Inc. (pdf) | SP0002385 | 06/25/2013 - 07/24/2013 |
| Waterbury | Ansonia Specialty Metals, LLC (pdf) | SP0002215 | 06/21/2013 - 07/20/2013 |
| Cheshire | Consolidated Industries, Inc. (pdf) | SP0002317 | 06/21/2013 - 07/20/2013 |
| South Windsor | Delisle Inc., d/b/a Metals Testing Company, Inc. (pdf) | SP0000380 | 05/21/2013 - 06/19/2013 |
| Danbury | Bedoukain Research, Inc. (pdf) | SP0000004 | 02/05/2013 - 03/06/2013 |
| West Haven | Seaboard Metal Fishing Co., Inc. (pdf) | SP0000127 | 02/04/2013 - 03/05/2013 |
| Ellington | Natural Country Farms, Inc. (pdf) | SP0002418 | 12/21/2012 - 01/20/2013 |
| Wolcott | Mattatuck International Scrap Metal (pdf) | SP0002324 | 12/21/2012 - 01/20/2013 |
| Danbury | R.S.A Corporation (pdf) | SP0001473 | 11/30/2012 - 12/30/2012 |
| Montville | Rand-Whitney Containerboard, L.P. (pdf) | SP0002032 | 09/26/2012 - 10/26/2012 |
| Easton | Eastern Reservoir Water Treatment Plant (pdf) | SP0002458 | 08/24/2012 - 09/24/2012 |
| Shelton | D.W. Loiselle Water Treatment Plant (pdf) | SP0002459 | 08/24/2012 - 09/24/2012 |
| Stratford | Ashcroft Inc. (pdf) | SP0000023 | 08/23/2012 - 09/23/2012 |
| Hartford | H.N.S. Management Company, Inc. (pdf) | SP0002218 | 08/22/2012 - 09/22/2012 |
| Newington | Kohler Mix Specialties, LLC (pdf) | SP0002278 | 08/22/2012 - 09/22/2012 |
| Windsor | Westinghouse Electric Company, LLC (pdf) | SP0002171 | 08/08/2012 - 09/08/2012 |
| Stafford | TTM Printed Circuit Group, Inc. (pdf) | SP0000069 | 08/02/2012 - 09/02/2012 |
| Stafford | TTM Printed Circuit Group, Inc. (pdf) | SP0001229 | 08/02/2012 - 09/02/2012 |
| Sprague | Fusion Paperboard Connecticut, LLC (pdf) | SP0002311 | 07/31/2012 - 08/31/2012 |
| Hartford | AmeriPride Services, Inc. (pdf) | SP0002312 | 07/27/2012 - 08/25/2012 |
| Watertown | Global Steering Systems, LLC (pdf) | SP0002182 | 07/24/2012 - 08/24/2012 |
| Stratford | Bridgeport Fittings, Incorporated (pdf) | SP0000680 | 06/28/2012 - 07/28/2012 |
| Cheshire | Microtech, Inc. (pdf) | SP0000026 | 06/28/2012 - 07/28/2012 |
| Mashantucket | Lake of Isles (pdf) | SP0002408 | 06/27/2012 - 07/27/2012 |
| New Britain | Guida-Siebert Dairy Company (pdf) | SP0002201 | 05/18/2012 - 06/18/2012 |
| Hamden | Porcelen Limited, Connecticut LLC (pdf) | SP0000656 | 04/24/2012 - 05/24/2012 |
| Farmington | EBM-PAPST Inc. (pdf) | SP0002406 | 04/12/2012 - 05/12/2012 |
| Stafford Springs | 3M Purification Inc. (pdf) | SP0000060 | 04/03/2012 - 05/03/2012 |
| Watertown | Truelove & Maclean Inc. (pdf) | SP0001326 | 04/03/2012 - 05/03/2012 |
| Norwich | Phelps Dodge Industries, Inc. (pdf) | SP0002326 | 03/23/2012 - 04/23/2012 |
| Bristol | Metal Fishing Technologies Inc. (pdf) | SP0001442 | 01/01/2012 - 02/01/2012 |
Final General Permits
Final General Permits Issued by EPA
- 2022 Construction General Permit (CGP)
- 2021 Multi-Sector General Permit (MSGP)
- 2014 Small Vessel General Permit (sVGP)
- 2013 Vessel General Permit (VGP)
Final General Permits Issued by the State of Connecticut
- General Permit for the Discharge of Dewatering and Remediation Wastewater, Issued: March 1, 2026 (pdf)
- General Pretreatment Permit for Significant Industrial User, Dewatering, and Remediation Discharges, Issued: October 29, 2025 (pdf)
- General Pretreatment Permit for Non-Significant Industrial User Discharges to Publicly Owned Treatment Works, Issued: October 29, 2025 (pdf)
- General Permit for the Discharge of Stormwater from Construction Activities, Issued: January 1, 2026 (pdf)
- General Permit for the Discharge of Stormwater Associated with Industrial Activities, Issued: October 1, 2025 (pdf)
- General Permit for Discharge of Stormwater Associated with Commercial Activity, Issued: October 1, 2025 (pdf)
- General Permit for Discharge of Stormwater from the Connecticut Department of Transportation Separate Storm Sewer Systems, Issued: June 23, 2025 (pdf)
- General Permit for Point Source Discharges to Waters of the State from the Application of Pesticides, Issued: October 22, 2024 (pdf)
- Notice of General Permit Reissuance for the National Pollutant Discharge Elimination System & State General Permit for the Discharge of Swimming Pool Wastewater to Surface and Ground Waters, Issued: July 10, 2024 (pdf)
- Notice of Reissuance for the National Pollutant Discharge Elimination System General Permit for the Discharge of Stormwater from Small Municipal Separate Storm Sewer Systems, Issued: September 29, 2023 (pdf)
- General Permit for Concentrated Animal Feeding Operations (CAFO GP), Issued: January 1, 2023 (pdf)
- General Permit for the Discharge of Wastewaters from Categorical Industrial Users to a Publicly Owned Treatment Works (POTW), Issued: May 3, 2018 (pdf)
- General Permit for Miscellaneous Discharges of Sewer Compatible (MISC) Wastewater, Issued: May 3, 2018 (pdf)
- Notice of Issuance General Permit to Discharge from Subsurface Sewage Disposal Systems Serving Existing Facilities, Issued: May 9, 2012 (pdf)
Note that links in the table below open in new browser windows/tabs.
EPA New England Issued Permits for Tribal Lands
Please note that stormwater permit information is available at our NPDES Stormwater Permit Program in New England page.