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
- Draft Comprehensive General Permit for Discharges to Surface and Ground Water, State of CT
Comment Period: 09/18/2024 - 10/18/2024 - Draft General Permit for the Discharge of Dewatering and Remediation Wastewaters, State of CT
Comment Period: 08/01/2024 - 09/01/2024 - Draft General Permit for Point Source Discharges to Waters of the State from the Application of Pesticides, State of CT
Comment Period: 04/19/2024 - 05/19/2024- 2016 Draft General Permit for Point Source Discharges to Waters of the State from the Application of Pesticides (pdf)
Comment Period: 09/27/2016 - 10/27/2016
- 2016 Draft General Permit for Point Source Discharges to Waters of the State from the Application of Pesticides (pdf)
- Draft General Permit for the Discharge of Stormwater Associated with Industrial Activities, State of CT
Comment Period: 03/26/2024 - 05/10/2024- 2018 Draft General Permit for the Discharge of Stormwater Associated with Industrial Activity(pdf)
Comment Period: 03/29/2018 - 04/29/2018
- 2018 Draft General Permit for the Discharge of Stormwater Associated with Industrial Activity(pdf)
- Draft General Permit for the Discharge of Swimming Pool Wastewater to Surface and Ground Waters, State of CT
Comment Period: 02/10/2024 - 03/10/2024 - Draft General Permit Discharge of Stormwater from the Connecticut Department of Transportation Separate Storm Sewer Systems, State of CT
Comment Period: 12/21/2023 - 01/21/2024 - Draft General Permit for the Discharge of Wastewaters from Significant Industrial Users (SIU) (pdf)
Comment Period: 01/11/2019 - 02/11/2019 - Draft General Permit for Discharges of Miscellaneous Sewer Compatible (MISC) Wastewater from Industrial Users (pdf)
Comment Period: 01/11/2019 - 02/11/2019- 2018 Draft General Permit for Miscellaneous Discharges of Sewer Compatible (MISC) Wastewater(pdf)
Comment Period: 03/23/2018 - 04/23/2018 - 2016 Draft General Permit for Miscellaneous Discharges of Sewer Compatible (MISC) Wastewater (pdf)
Comment Period: 09/27/2016 - 10/27/2016
- 2018 Draft General Permit for Miscellaneous Discharges of Sewer Compatible (MISC) Wastewater(pdf)
- Draft Proposed General Permit for Nitrogen Discharges (pdf)
Comment Period: 06/12/2018 - 07/12/2018 - Draft General Permit for the Discharge of Stormwater and Dewatering Wastewaters from Construction Activities (pdf)
Comment Period: 03/29/2018 - 04/29/2018 - Draft General permit for the Discharge of Wastewaters from Categorical Industrial Users to a Public Owned Treatment Works (POTW) (pdf)
Comment Period: 03/23/2018 - 04/23/2018 - Draft General Permit for the Discharge of Low Flow Water Treatment Wastewater (pdf)
Comment Period: 12/27/2017 - 01/27/2018 - Draft Comprehensive General Permit to Surface Water & Groundwater (pdf)
Comment Period: 09/27/2016 - 10/27/2016 - Draft General Permit for the Discharge of Groundwater Remediation Wastewater (pdf)
Comment Period: 09/27/2016 - 10/27/2016 - 2012 Draft General Permit to Discharge from Subsurface Sewage Disposal Systems Serving Existing Facilities (pdf)
Draft Pretreatment General Permits
| City / Town | Applicant / Facility Name | Permit Number | Comment Period Dates |
|---|---|---|---|
| Watertown | Click Bond, Inc. | SP0000920 | 08/23/2024 - 09/23/2024 |
| Bridgeport | Bridgeport Energy LLC | SP0002330 | 08/21/2024 - 09/21/2024 |
| North Stonington | Lake of Isles, LLC | 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) | SP000026 | 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 Indistries, 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 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 D 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 the Discharge of Stormwater and Dewatering Wastewaters Associated with Construction Activities, Issued: May 31, 2018 (pdf)
- General Permit for the Discharge of Stormwater Associated with Industrial Activity, Issued: May 31, 2018 (pdf)
- General Permit for the Discharge of Stormwater from the Department of Transportation Separate Storm Sewer Systems, Issued: May 24, 2018 (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)
- General Permit for the Discharge of Stormwater Associated with Commercial Activity, Issued: May 15, 2017 (pdf)
- General Permit for Point Source Discharges to Waters of the State from the Application of Pesticides, Issued: May 15, 2017 (pdf)
- Notice of Issuance General Permit to Discharge from Subsurface Sewage Disposal Systems Serving Existing Facilities, Issued: May 9, 2012 (pdf)
- General Permit for the Discharge of Stormwater from Small Municipal Separate Storm Sewer Systems, Re-Issued: January 9, 2013 (pdf)
| City / Town (Receiving Water) | Applicant / Facility Name | Permit Number | Date of Issuance |
|---|---|---|---|
| Bridgeport (POTW) | Lacey Manufacturing Company LLC (pdf) | CTCIU0026 | 02/15/2017 |
| Manchester (POTW) | Praxair Surface Technologies, Inc (pdf) | CTCIU0022 | 10/18/2017 |
| Newington (POTW) | Component Technologies, Inc. [Modification] (pdf) | CTCIU0028 | 10/18/2017 |
| Newington (POTW) | Component Technologies, Inc. (pdf) | CTCIU0028 | 03/31/2017 |
| South Windsor (POTW) | Aerospace Testing Laboratory, Inc. (pdf) | CTCIU0027 | 03/29/2017 |
| Watertown (POTW) | Utitec Inc. (pdf) | CTCIU0033 | 03/08/2019 |
| West Hartford (POTW) | The United Tool and Die Company [Modification] (pdf) | CTCIU0032 | 03/08/2019 |
| West Hartford (POTW) | The United Tool and Die Company (pdf) | CTCIU0032 | 11/08/2018 |
| Bridgeport (Groundwater Remediation Wastewater) | Sporting Goods Properties Inc - Lake Success Munitions Pond Project (pdf) | CTRSW0001 | 11/07/2018 |
| Bethel | Culligan Water Company of CT, Inc. (pdf) | SP0000993 | 01/15/2013 |
| Branford | Cintas Corporation (pdf) | SP0000093 | 05/12/2012 |
| Bridgeport | Reliable Plating and Polishing Company, Inc. (pdf) | SP0000106 | 06/11/2014 |
| Bristol | Metal Fishing Technology, LLC (pdf) | SP0001442 | 05/29/2012 |
| Centerbrook | Tower Laboratories, Ltd. (pdf) | SP0002414 | 01/18/2013 |
| Cheshire | Consolidated Industries Acquisition Corporation (pdf) | SP0002317 | 08/07/2013 |
| Cheshire | Fujikuin of America (pdf) | SP0002291 | 04/17/2012 |
| Danbury | Barden Company, The (pdf) | SP0001059 | 04/25/2012 |
| Danbury | Bedoukian Research, Inc. (pdf) | SP0000004 | 09/13/2013 |
| Danbury | R.S.A. CORP (pdf) | SP0001473 | 01/18/2013 |
| East Granby | Delta Industries, Inc. (pdf) | SP0001362 | 08/27/2012 |
| Ellington | Natural Country Farms, Inc. (pdf) | SP0002418 | 02/05/2013 |
| Groton | Electric Boat Company (pdf) | SP0000440 | 10/09/2012 |
| Hartford | AmeriPride Services, Inc. (pdf) | SP0002312 | 06/12/2012 |
| Hartford | H.N.S Management Company, Inc. (pdf) | SP0002218 | 10/01/2012 |
| Meriden (Connecticut River) | AGC Incorporated (pdf) | SP0000120 | 06/25/2012 |
| Milford (Housatonic River) | Devon Power, LLC (pdf) | SP0002444 | 04/05/2012 |
| Montville | Rand-Whitney Containerboard, L.P. (pdf) | SP0002032 | 11/15/2012 |
| New Britain | Guida-Siebert Dairy Company (pdf) | SP0002201 | 07/17/2012 |
| New Britain | Pape Electroplating Company (pdf) | SP0000059 | 08/22/2013 |
| New London | Faria Limited (pdf) | SP0002442 | 09/13/2013 |
| New London | USCG Academy (pdf) | SP0002235 | 10/27/2010 |
| Newington | Component Technologies, Inc. (pdf) | SP0001454 | 04/05/2012 |
| Newington | Kohler Mix Specialties, LLC (pdf) | SP0002278 | 10/09/2012 |
| Norwich | Phelps Dodge Industries, Inc. dba Freeport-McMoRan Copper Products (pdf) | SP0002326 | 05/18/2012 |
| Plainville | Plainville Plating Company, Inc. (pdf) | SP0002385 | 08/06/2013 |
| Ridgefield | Boehringer Ingelheim Pharmaceuticals, Inc. (pdf) | SP0000021 | 10/25/2013 |
| South Windsor | Aerospace Testing Laboratory (pdf) | SP0002430 | 04/06/2012 |
| South Windsor | Delisle Inc. (pdf) | SP0000380 | 07/22/2013 |
| Sprague | Fusion Paperboard Connecticut, LLC (pdf) | SP0002311 | 09/24/2012 |
| Stafford Springs | 3M Purification, Inc. (pdf) | SP0000060 | 05/22/2012 |
| Stratford | Ashcroft, Inc.(pdf) | SP0000023 | 10/09/2012 |
| Stratford | Unifirst Corporation (pdf) | SP0001109 | 02/28/2014 |
| Waterbury | GBC Metals, LLC (pdf) | SP0001332 | 06/25/2013 |
| Waterbury | Mirror Polishing & Plating Company (pdf) | SP0001930 | 04/17/2012 |
| Watertown | Philson, Inc. (pdf) | SP0000019 | 04/25/2014 |
| Watertown | Truelove & Maclean (pdf) | SP0001326 | 05/17/2012 |
| West Hartford | Har-Conn Chrome Company, The (pdf) | SP0002230 | 02/28/2014 |
| West Haven | Seaboard Metal Fishing Co., Inc. (pdf) | SP0000127 | 03/22/2013 |
| West Haven | Sylvian R. Shemits Designs, Inc. (pdf) | SP0002179 | 10/07/2013 |
| Windsor Locks | Inland Technologies International Limitied/CT Airport Authority (pdf) | SP0002364 | 03/04/2014 |
| Windsor Locks | United Parcel Service, Inc. (pdf) | SP0002365 | 03/19/2014 |
| Wolcott | Mattatuck Industrial Scrap Metal, Inc. (pdf) | SP0002324 | 03/01/2013 |
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.