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.

• Draft General Permits
  • Draft Pretreatment General Permits
• Final General Permits
  • Final General Permits Issued by EPA
  • Final General Permits Issued by the State of Connecticut
• EPA New England Issued Permits for Tribal Lands

• Connecticut Draft Individual Permits
• Connecticut Final Individual Permits
• EPA NPDES Permit Forms & Attachments for New England
• NPDES Water Permit Program in New England
  • ME NPDES Permits | MA NPDES Permits | NH 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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Draft General Permits

• Draft General Permit for Significant Industrial User Discharges to Publicly Owned Treatment Works, State of CT
  Comment Period: 04/28/2025 - 05/28/2025
• Draft General Permit for Non-Significant Industrial User Discharges to Publicly Owned Treatment Works, State of CT
  Comment Period: 04/28/2025 - 05/28/2025
• Draft General Permit for the Discharge of Stormwater Associated with Commercial Activity, State of CT
  Comment Period: 03/20/2024 - 04/19/2025
• Draft General Permit for the Discharge of Stormwater Associated with Industrial Activities, State of CT
  Comment Period: 12/30/2024 - 01/29/2025
• 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) (659 KB)
    Comment Period: 09/27/2016 - 10/27/2016
• 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) (1.2 MB)
    Comment Period: 03/29/2018 - 04/29/2018
• 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) (938 KB)
  Comment Period: 01/11/2019 - 02/11/2019
• Draft General Permit for Discharges of Miscellaneous Sewer Compatible (MISC) Wastewater from Industrial Users (pdf) (471 KB)
  Comment Period: 01/11/2019 - 02/11/2019
  • 2018 Draft General Permit for Miscellaneous Discharges of Sewer Compatible (MISC) Wastewater(pdf) (1.6 MB)
    Comment Period: 03/23/2018 - 04/23/2018
  • 2016 Draft General Permit for Miscellaneous Discharges of Sewer Compatible (MISC) Wastewater (pdf) (989 KB)
    Comment Period: 09/27/2016 - 10/27/2016
• Draft Proposed General Permit for Nitrogen Discharges (pdf) (451 KB)
  Comment Period: 06/12/2018 - 07/12/2018
• Draft General Permit for the Discharge of Stormwater and Dewatering Wastewaters from Construction Activities (pdf) (1.1 MB)
  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) (1 MB)
  Comment Period: 03/23/2018 - 04/23/2018
• Draft General Permit for the Discharge of Low Flow Water Treatment Wastewater (pdf) (496 KB)
  Comment Period: 12/27/2017 - 01/27/2018
• Draft Comprehensive General Permit to Surface Water & Groundwater (pdf) (891 KB)
  Comment Period: 09/27/2016 - 10/27/2016
• Draft General Permit for the Discharge of Groundwater Remediation Wastewater (pdf) (1.2 MB)
  Comment Period: 09/27/2016 - 10/27/2016
• 2012 Draft General Permit to Discharge from Subsurface Sewage Disposal Systems Serving Existing Facilities (pdf) (630 KB)

Draft Pretreatment General Permits

Note that links in the table below open in new browser windows/tabs.

List of Connecticut Draft Pretreatment General Permits

City / Town	Applicant / Facility Name	Permit Number	Comment Period Dates
Watertown	Click Bond, Inc.(pdf) (1.1 MB)	SP0000920	08/23/2024 - 09/23/2024
Bridgeport	Bridgeport Energy LLC(pdf) (1.3 MB)	SP0002330	08/21/2024 - 09/21/2024
North Stonington	Lake of Isles, LLC (pdf) (1.3 MB)	SP0002408	05/06/2024 - 06/06/2024
Bristol	Theis Precision Steel USA, Inc. (NOI Denial Notice) (pdf) (300 KB)	SP0002327	10/02/2023 - 11/02/2023
Stafford Springs	3M Purification Inc. (pdf) (684 KB)	SP0000060	12/10/2015 - 01/10/2016
Woodstock	Crabtree & Evelyn, Ltd. (pdf) (829 KB)	SP0002299	12/01/2015 - 12/31/2015
Danbury	Goodrich Corporation (pdf) (710 KB)	SP0000006	11/24/2015 - 12/24/2015
West Haven	Enthone, Inc. (pdf) (817 KB)	SP0001123	08/05/2015 - 09/05/2015
New London	Sheffield Pharmaceuticals, LLC (pdf) (805 KB)	SP0002442	08/04/2015 - 09/04/2015
Bethel	Vanderbilt Chemicals, LLC (pdf) (815 KB)	SP0000110	11/26/2014 - 12/26/2014
Watertown	Global Steering Systems, LLC (pdf) (746 KB)	SP0002182	10/28/2014 - 11/28/2014
Newington	Beacon Industries (pdf) (618 KB)	SP0000624	06/18/2014 - 07/17/2014
Stratford	Sikosky Aircraft Corporation (pdf) (600 KB)	SP0000551	05/30/2014 - 06/30/2014
Mystic	Mystic Aquarium (pdf) (526 KB)	SP0002426	05/20/2014 - 06/20/2014
Thomaston	Unimetal Surface Finishing, LLC (pdf) ( 607 KB)	SP0002461	12/13/2013 - 01/13/2014
West Hartford	United Tool and Die Company (pdf) (497 KB)	SP0000039	10/16/2013 - 11/16/2013
Stafford Springs	Warren Corporation (pdf) (472 KB)	SP0000456	10/01/2013 - 11/01/2013
New Britain	Peter Paul Electronics Co. Inc. (pdf) (432 KB)	SP0000778	08/14/2013 - 09/12/2013
Plainville	Plainville Plating Company, Inc. (pdf) (437 KB)	SP0002385	06/25/2013 - 07/24/2013
Waterbury	Ansonia Specialty Metals, LLC (pdf) (423 KB)	SP0002215	06/21/2013 - 07/20/2013
Cheshire	Consolidated Industries, Inc. (pdf) (482 KB)	SP0002317	06/21/2013 - 07/20/2013
South Windsor	Delisle Inc., d/b/a Metals Testing Company, Inc. (pdf) (558 KB)	SP0000380	05/21/2013 - 06/19/2013
Danbury	Bedoukain Research, Inc. (pdf) (635 KB)	SP0000004	02/05/2013 - 03/06/2013
West Haven	Seaboard Metal Fishing Co., Inc. (pdf) (502 KB)	SP0000127	02/04/2013 - 03/05/2013
Ellington	Natural Country Farms, Inc. (pdf) (494 KB)	SP0002418	12/21/2012 - 01/20/2013
Wolcott	Mattatuck International Scrap Metal (pdf) ( 633 KB)	SP0002324	12/21/2012 - 01/20/2013
Danbury	R.S.A Corporation (pdf) (397 KB)	SP0001473	11/30/2012 - 12/30/2012
Montville	Rand-Whitney Containerboard, L.P. (pdf) (876 KB)	SP0002032	09/26/2012 - 10/26/2012
Easton	Eastern Reservoir Water Treatment Plant (pdf) (377 KB)	SP0002458	08/24/2012 - 09/24/2012
Shelton	D.W. Loiselle Water Treatment Plant (pdf) (329 KB)	SP0002459	08/24/2012 - 09/24/2012
Stratford	Ashcroft Inc. (pdf) (360 KB)	SP0000023	08/23/2012 - 09/23/2012
Hartford	H.N.S. Management Company, Inc. (pdf) (229 KB)	SP0002218	08/22/2012 - 09/22/2012
Newington	Kohler Mix Specialties, LLC (pdf) (341 KB)	SP0002278	08/22/2012 - 09/22/2012
Windsor	Westinghouse Electric Company, LLC (pdf) (307 KB)	SP0002171	08/08/2012 - 09/08/2012
Stafford	TTM Printed Circuit Group, Inc. (pdf) (442 KB)	SP0000069	08/02/2012 - 09/02/2012
Stafford	TTM Printed Circuit Group, Inc. (pdf) (404 KB)	SP0001229	08/02/2012 - 09/02/2012
Sprague	Fusion Paperboard Connecticut, LLC (pdf) (536 KB)	SP0002311	07/31/2012 - 08/31/2012
Hartford	AmeriPride Services, Inc. (pdf) (104 KB)	SP0002312	07/27/2012 - 08/25/2012
Watertown	Global Steering Systems, LLC (pdf) (394 KB)	SP0002182	07/24/2012 - 08/24/2012
Stratford	Bridgeport Fittings, Incorporated (pdf) (365 KB)	SP0000680	06/28/2012 - 07/28/2012
Cheshire	Microtech, Inc. (pdf) (352 KB)	SP000026	06/28/2012 - 07/28/2012
Mashantucket	Lake of Isles (pdf) (351 KB)	SP0002408	06/27/2012 - 07/27/2012
New Britain	Guida-Siebert Dairy Company (pdf) (144 KB)	SP0002201	05/18/2012 - 06/18/2012
Hamden	Porcelen Limited, Connecticut LLC (pdf) (131 KB)	SP0000656	04/24/2012 - 05/24/2012
Farmington	EBM-PAPST Inc. (pdf) (124 KB)	SP0002406	04/12/2012 - 05/12/2012
Stafford Springs	3M Purification Inc. (pdf) (104 KB)	SP0000060	04/03/2012 - 05/03/2012
Watertown	Truelove & Maclean Inc. (pdf) (112 KB)	SP0001326	04/03/2012 - 05/03/2012
Norwich	Phelps Dodge Indistries, Inc. (pdf) (155 KB)	SP0002326	03/23/2012 - 04/23/2012
Bristol	Metal Fishing Technologies Inc. (pdf) (120 KB)	SP0001442	01/01/2012 - 02/01/2012

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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) (1 MB)
• 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) (1.1 MB)
• 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) (1.6 MB)
• General Permit for Concentrated Animal Feeding Operations (CAFO GP), Issued: January 1, 2023 (pdf) (986 KB)
• General Permit for the Discharge of Stormwater and Dewatering Wastewaters Associated with Construction Activities, Issued: May 31, 2018 (pdf) (642 KB)
• General Permit for the Discharge of Stormwater Associated with Industrial Activity, Issued: May 31, 2018 (pdf) (644 KB)
• General Permit for the Discharge of Stormwater from the Department of Transportation Separate Storm Sewer Systems, Issued: May 24, 2018 (pdf) (1.2 MB)
• General Permit for the Discharge of Wastewaters from Categorical Industrial Users to a Publicly Owned Treatment Works (POTW), Issued: May 3, 2018 (pdf) (887 KB)
• General Permit for Miscellaneous Discharges of Sewer Compatible (MISC) Wastewater, Issued: May 3, 2018 (pdf) (1.5 MB)
• General Permit for the Discharge of Stormwater Associated with Commercial Activity, Issued: May 15, 2017 (pdf) (154 KB)
• General Permit for Point Source Discharges to Waters of the State from the Application of Pesticides, Issued: May 15, 2017 (pdf) (198 KB)
• Notice of Issuance General Permit to Discharge from Subsurface Sewage Disposal Systems Serving Existing Facilities, Issued: May 9, 2012 (pdf) (631 KB)
• General Permit for the Discharge of Stormwater from Small Municipal Separate Storm Sewer Systems, Re-Issued: January 9, 2013 (pdf) (462 KB)

Note that links in the table below open in new browser windows/tabs.

List of Connecticut Final General Permits

City / Town (Receiving Water)	Applicant / Facility Name	Permit Number	Date of Issuance
Bridgeport (POTW)	Lacey Manufacturing Company LLC (pdf) (327 KB)	CTCIU0026	02/15/2017
Manchester (POTW)	Praxair Surface Technologies, Inc (pdf) (283 KB)	CTCIU0022	10/18/2017
Newington (POTW)	Component Technologies, Inc. [Modification] (pdf) (363 KB)	CTCIU0028	10/18/2017
Newington (POTW)	Component Technologies, Inc. (pdf) ( 327 KB)	CTCIU0028	03/31/2017
South Windsor (POTW)	Aerospace Testing Laboratory, Inc. (pdf) (327 KB)	CTCIU0027	03/29/2017
Watertown (POTW)	Utitec Inc. (pdf) (286 KB)	CTCIU0033	03/08/2019
West Hartford (POTW)	The United Tool and Die Company [Modification] (pdf) (386 KB)	CTCIU0032	03/08/2019
West Hartford (POTW)	The United Tool and Die Company (pdf) ( 370 KB)	CTCIU0032	11/08/2018
Bridgeport (Groundwater Remediation Wastewater)	Sporting Goods Properties Inc - Lake Success Munitions Pond Project (pdf) (161 KB)	CTRSW0001	11/07/2018
Bethel	Culligan Water Company of CT, Inc. (pdf) (460 KB)	SP0000993	01/15/2013
Branford	Cintas Corporation (pdf) (499 KB)	SP0000093	05/12/2012
Bridgeport	Reliable Plating and Polishing Company, Inc. (pdf) (738 KB)	SP0000106	06/11/2014
Bristol	Metal Fishing Technology, LLC (pdf) (94 KB)	SP0001442	05/29/2012
Centerbrook	Tower Laboratories, Ltd. (pdf) (149 KB)	SP0002414	01/18/2013
Cheshire	Consolidated Industries Acquisition Corporation (pdf) (746 KB)	SP0002317	08/07/2013
Cheshire	Fujikuin of America (pdf) (92 KB)	SP0002291	04/17/2012
Danbury	Barden Company, The (pdf) (98 KB)	SP0001059	04/25/2012
Danbury	Bedoukian Research, Inc. (pdf) (1.4 MB)	SP0000004	09/13/2013
Danbury	R.S.A. CORP (pdf) (764 KB)	SP0001473	01/18/2013
East Granby	Delta Industries, Inc. (pdf) (667 KB)	SP0001362	08/27/2012
Ellington	Natural Country Farms, Inc. (pdf) (391 KB)	SP0002418	02/05/2013
Groton	Electric Boat Company (pdf) (317 KB)	SP0000440	10/09/2012
Hartford	AmeriPride Services, Inc. (pdf) (437 KB)	SP0002312	06/12/2012
Hartford	H.N.S Management Company, Inc. (pdf) (474 KB)	SP0002218	10/01/2012
Meriden (Connecticut River)	AGC Incorporated (pdf) (457 KB)	SP0000120	06/25/2012
Milford (Housatonic River)	Devon Power, LLC (pdf) (235 KB)	SP0002444	04/05/2012
Montville	Rand-Whitney Containerboard, L.P. (pdf) (3.4 MB)	SP0002032	11/15/2012
New Britain	Guida-Siebert Dairy Company (pdf) (418 KB)	SP0002201	07/17/2012
New Britain	Pape Electroplating Company (pdf) (807 KB)	SP0000059	08/22/2013
New London	Faria Limited (pdf) (889 KB)	SP0002442	09/13/2013
New London	USCG Academy (pdf) (65 KB)	SP0002235	10/27/2010
Newington	Component Technologies, Inc. (pdf) (106 KB)	SP0001454	04/05/2012
Newington	Kohler Mix Specialties, LLC (pdf) (221 KB)	SP0002278	10/09/2012
Norwich	Phelps Dodge Industries, Inc. dba Freeport-McMoRan Copper Products (pdf) (442 KB)	SP0002326	05/18/2012
Plainville	Plainville Plating Company, Inc. (pdf) (661 KB)	SP0002385	08/06/2013
Ridgefield	Boehringer Ingelheim Pharmaceuticals, Inc. (pdf) (874 KB)	SP0000021	10/25/2013
South Windsor	Aerospace Testing Laboratory (pdf) (84 KB)	SP0002430	04/06/2012
South Windsor	Delisle Inc. (pdf) (888 KB)	SP0000380	07/22/2013
Sprague	Fusion Paperboard Connecticut, LLC (pdf) (217 KB)	SP0002311	09/24/2012
Stafford Springs	3M Purification, Inc. (pdf) (90 KB)	SP0000060	05/22/2012
Stratford	Ashcroft, Inc.(pdf) (276 KB)	SP0000023	10/09/2012
Stratford	Unifirst Corporation (pdf) (388 KB)	SP0001109	02/28/2014
Waterbury	GBC Metals, LLC (pdf) (502 KB)	SP0001332	06/25/2013
Waterbury	Mirror Polishing & Plating Company (pdf) (481 KB)	SP0001930	04/17/2012
Watertown	Philson, Inc. (pdf) (753 KB)	SP0000019	04/25/2014
Watertown	Truelove & Maclean (pdf) (517 KB)	SP0001326	05/17/2012
West Hartford	Har-Conn Chrome Company, The (pdf) (457 KB)	SP0002230	02/28/2014
West Haven	Seaboard Metal Fishing Co., Inc. (pdf) (583 KB)	SP0000127	03/22/2013
West Haven	Sylvian R. Shemits Designs, Inc. (pdf) (283 KB)	SP0002179	10/07/2013
Windsor Locks	Inland Technologies International Limitied/CT Airport Authority (pdf) (660 KB)	SP0002364	03/04/2014
Windsor Locks	United Parcel Service, Inc. (pdf) (541 KB)	SP0002365	03/19/2014
Wolcott	Mattatuck Industrial Scrap Metal, Inc. (pdf) (369 KB)	SP0002324	03/01/2013

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EPA New England Issued Permits for Tribal Lands

• General Permit for Storm Water Discharges from Regulated Small Municipal Separate Storm Sewer Systems, MS4s (pdf) (265 KB)

Please note that stormwater permit information is available at our NPDES Stormwater Permit Program in New England page.