Water Discharge Permits and General Permits

Emergency or Temporary Discharge Authorization | Permit Applications for Wastewater Discharges | Supporting Documentation for Wastewater Discharge Permits | General Permits | Stormwater General Permits

Emergency or Temporary Discharge Authorization

Emergency or Temporary Discharge Authorization

Permit Type and Related Information	Application Forms	Instructions	Last Revised	Required Common Forms and Other Related Forms
Emergency or Temporary Discharge Authorization - see notes below	Emergency or Temporary Discharge Authorization Word Emergency or Temporary Discharge Authorization PDF	NA	04/01/24	Coastal Consistency Review Form Natural Diversity Database Review

Permit Type and Related Information

Application
Forms

Instructions

Last Revised

Required Common Forms
and Other Related Forms

Emergency or Temporary Discharge Authorization - see notes below

Emergency or Temporary Discharge Authorization Word

Emergency or Temporary Discharge Authorization PDF

04/01/24

Coastal Consistency Review Form

Natural Diversity Database Review

Notes regarding Emergency or Temporary Authorizations:

Insitu Remediation: If the discharge is to groundwater and is associated with insitu remediation, the discharger must file for authorization under the Application for Emergency or Temporary Authorization to Discharge to Groundwater to Remediate Pollution (instructions). For further information on other Remediation Permits refer to: Land Use Permits and General Permits (ct.gov).

Discharges to Sanitary Sewer and Publicly Owned Treatment Works: If the discharge is to a sanitary sewer, and is composed solely of dewatering or groundwater remediation wastewater as defined in the General Pretreatment Permit for Significant Industrial User, Dewatering, and Remediation Discharges (SIU GP), the applicant must file for authorization under the SIU GP.

Surface Water and Groundwater Discharges: If the discharge is to a surface water or groundwater, and is composed solely of dewatering or groundwater remediation wastewater as defined in the General Permit for the Discharge of Dewatering and Remediation Wastewater to Surface Water and Groundwater (D2R), the applicant must file for authorization under the D2R.

Individual Permit Applications for Wastewater Discharges

Depending on your proposed wastewater discharges, you will need to use one of the forms listed below and you will also need to download one or more of the supporting documents listed further below. Review the applicable instructions for a summary of which supporting documents and attachments must be submitted for each type of discharge.

Individual Permit Applications for Wastewater Discharges

Permit Type and Related Information	Application Forms	Instructions	Last Revised	Required Common Forms and Other Related Forms
Domestic Sewage Treatment Works (For municipal and private sewage treatment facilities discharging to surface waters)	*	*		*Refer to Municipal Wastewater for more detail
New, Renewal, or modification application for wastewater discharges to surface water, a POTW, or groundwater from manufacturing, commercial, or other activities (see Instructions for full list). Industrial Wastewater Program	Industrial Wastewater Program Word Industrial Wastewater Program PDF	PDF	application: 10/01/13; instructions: 12/13/16 (updated testing requirements for steam electric power plants in Schedule A)	Wastewater Discharge Permit Application Checklist Wastewater Discharge Permit Application Checklist Word Wastewater Discharge Permit Application Checklist PDF Certification of Notice Form Natural Diversity Database Review
Non-significant facility or treatment system modifications (3i determinations) Non-significant facility or treatment system modifications Fact sheet	Application Application Word; Application PDF Checklist: Checklist Word; Checklist PDF	Instructions
New, renewal, or modification application for wastewater discharges to subsurface sewage treatment and disposal systems	subsurface sewage treatment and disposal systemsWord subsurface sewage treatment and disposal systems PDF	subsurface sewage treatment and disposal systems instructionsPDF	application and instructions: 09/16/19; updates to program name and NDDB	Certification of Notice Form Natural Diversity Database Review

Related Guidance and Other Information

elated Guidance and Other Information Fact Sheet

Water Discharge Permit Compliance Information Package

Common Errors and Omissions

Discharge Monitoring Report Instruction Manual

Supporting Documentation for Individual Wastewater Discharge Permits

Note: Depending on your proposed wastewater discharges, you will need to use one of the main forms listed under Individual Permit Applications for Wastewater Discharges and you will also need to download one or more of the supporting documents listed below. Review the applicable main instructions for a summary of which supporting documents (attachments) must be submitted for each type of discharge. Instructions for each of the supporting documents are included with each of the corresponding main instructions listed above.

Supporting Documentation for Individual Wastewater Discharge Permits

Attachment Name	Forms	Last Revised
Attachment A: Executive Summary (DEEP-WPED-APP-101)	Word Executive Summary PDF	10/01/13
Attachment B: Applicant Background Information (DEEP-APP-008)	Applicant Background Word Applicant Background PDF	06/12/12
Attachment C: Applicant Compliance Information (DEEP-APP-002)	Applicant Compliance Information Word Applicant Compliance Information PDF	08/08/11
*Attachment D: USGS Quadrangle Map and Latitude and Longitude* (DEEP-APP-003)**	USGS Quadrangle Map Word USGS Quadrangle Map PDF	08/08/11
Attachment E: Coastal Consistency Review Form (DEEP-APP-004)	Coastal Consistency Review FormWord Coastal Consistency Review Form PDF	08/08/11
Attachment F: Copy of the NDDB Determination response letter that has not expired, if applicable. Include a copy of any mitigation measures developed for this activity and approved by NDDB.	N/A	N/A
Attachment G: Conservation or Restriction Information	No DEEP form	N/A
*Attachment H: Copy of the Written Environmental Justice Public Participation Plan* Approval Letter**	N/A	N/A
Attachment I-1: Site Plans and Floor Plans	No DEEP form	N/A
Attachment I: Operation and Maintenance of Collection and Treatment Systems - Description, Plan Checklist and Certification (DEEP-WPED-APP-103)	Operation and Maintenance of Collection and Treatment Systems Word Operation and Maintenance of Collection and Treatment Systems PDF	10/01/13
Attachment J: Solvent Management Plan (DEEP-WPED-APP-104)	Solvent Management Plan Word Solvent Management Plan PDF	10/01/13
Attachment K: Spill Prevention and Control Plan, Plan Checklist and Certification (DEEP-WPED-APP-105)	Spill Prevention and Control Plan Word Spill Prevention and Control Plan PDF	10/01/13
Attachment L: Resource Conservation Strategies (DEEP-WPED-APP-106)	Resource Conservation Strategies Word Resource Conservation Strategies PDF	10/01/13
Attachment M: Line Drawing and Process Flow Diagram	No DEEP form	N/A
Attachment N: Description, and Plans and Specifications of Collection, Treatment and Disposal Systems	No DEEP form	N/A
Attachment O: Discharge Information (DEEP-WPED-APP-107)	Discharge Information Word Discharge Information PDF	10/01/13
Attachment P: Sewage Sludge Information for Domestic Sewage Treatment Facilities (DEEP-WPED-APP-108) (includes Summary Sheet of Industrial and Commercial Non-hazardous Waste hauled to Water Pollution Control Facilities - formerly Attachment V)	Sludge Information for Domestic Sewage Treatment Facilities Word Sludge Information for Domestic Sewage Treatment Facilities PDF	10/01/13
Attachment Q: Engineering Report for Subsurface Sewage Treatment and Disposal Systems	No DEEP form	N/A
Attachment R: Checklist for Solid Waste Disposal Areas (DEEP-WPED-APP-110A)	Checklist for Solid Waste Disposal Areas Word Checklist for Solid Waste Disposal Areas PDF	08/17/11
Attachment S: Agricultural Activities (DEEP-WPED-APP-111)	Agricultural Activities Word Agricultural Activities PDF	10/01/13
Attachment T: Concentrated Aquatic Animal Production Facilities (DEEP-WPED-APP-112)	Concentrated Aquatic Animal Production Facilities Word Concentrated Aquatic Animal Production Facilities PDF	10/01/13
Attachment U: Community Sewerage Systems (Sample letter)	Community Sewerage Systems Word Community Sewerage Systems PDF	09/27/12
Attachment W: Renewal of an Existing Permit or Other Discharges Previously Licensed by DEEP (DEEP-WPED-APP-102)	Renewal of an Existing Permit Word Renewal of an Existing Permit PDF	10/01/13
Attachment X: Certification Regarding Submittal of Previously Approved Documents (DEEP-WPED-APP-102A)	Certification Regarding Submittal of Previously Approved Documents Word Certification Regarding Submittal of Previously Approved Documents PDF	10/01/13

General Permits

General Permit and Other Related Information	Registration Forms	Instructions	Last Revised	Required Common Forms and Other Related Forms
Violation Form	Violation Form Word Violation Form PDF	N/A	03/15/18	N/A
Comprehensive Discharges to Surface Water and Groundwater Re-Issued: 03/15/2023 Effective 04/01/2023 Expiration Date: 4/01/2025	Discharges to Surface Water and Groundwater Word Discharges to Surface Water and Groundwater PDF	Discharges to Surface Water and Groundwater instructions PDF	08/23/21 updated mod fee and links	Coastal Consistency Review Form Natural Diversity Database Review
Concentrated Animal Feeding Operation (CAFO) Issued: 12/06/2022 Effective: 01/01/2023 Expiration Date: 12/31/2027 Concentrated Animal Feeding Operation Fact Sheet	Concentrated Animal Feeding Operation Word Concentrated Animal Feeding Operation PDF	Concentrated Animal Feeding Operation instructions PDF	12/20/2022
Domestic Sewage Effective Date 10/09/2022 Expiration Date: 10/08/2032 Domestic Sewage Fact Sheet	Domestic Sewage Word Domestic Sewage PDF	N/A	10/09/22	N/A
Food Service Establishment Wastewater Issued: 10/05/2015 Expiration Date: 10/04/2025 Food Service Establishment Wastewater Fact Sheet Fats, Oils and Greases (FOG) Model Program	N/A	N/A	10/05/15	Note: No Registration Required
Dewatering and Groundwater Remediation General Permit (D2R) Appendix A – PFAS Analytes Appendix B – Whole Effluent Toxicity (WET) Issued: 3/1/2026 Effective: 3/1/2026 Expiration: 2/28/2031 Dewatering and Groundwater Remediation General Permit Fact Sheet Dewatering and Groundwater Remediation General Permit Response to Comments	Application Form Application Part V - Use for additional discharges as needed	Application User Guide	3/1/2026	Application Transmittal Form Attachment I – Screening Form NetDMR Subscriber Agreement Notice of Termination Form (coming soon!)
Non-Significant Industrial Users (Non-SIU GP) For information refer to the Non-SIU GP Website. Issued10/29/2025 Effective Date: 12/1/2025 Expiration Date: 10/28/2030 Non-Significant Industrial Users Fact Sheet	Submit a Non-SIU GP Registration	Notification User Guide	12/1/2025
Nitrogen Discharges Re-Issued 01/01/2024 Expiration Date: 12/31/2028 Nitrogen DischargFact Sheet	N/A	N/A	01/01/24	Note: No Registration Required
Point Source Discharges to Waters of the State from the Application of Pesticides Re-Issued:10/22/2024 Expires: 10/21/2029 Point Source Discharges to Waters Notice of Issuance Fact Sheet Notice of Issuance Response to Comments List of General Permits Notice of Issuance Fact Sheet	Point Source Discharges to WatersWord Point Source Discharges to WatersPDF	N/A	10/22/24	Coastal Consistency Review Form Natural Diversity Database Review
Significant Industrial Users, Dewatering, and Remediation Discharges (SIU GP) For information refer to the SIU GP Website. Issued 10/29/2025 Effective 12/1/2025 Expiration Date: 10/28/2030 Remediation Discharges Fact Sheet	Application Form for Industrial SIUs Application Form for Dewatering and Remediation	Application Guidance	12/1/2025	Attachments for Industrial SIUs WPED Application Transmittal Form PDF WPED Application Transmittal Form Word Attachment B - POTW Notification Cert Attachment D Discharge Information Attachment D1_Metal Finishing Screening Tables Attachment D2_Process Non-process Screening Tables Attachment F Monitoring Waiver Attachment G Plan Checklists Attachment H Solvent Management Plan Attachment I Subscriber Agreement Form Attachment J Analytical Data Summary Attachment K Variance Request Attachments for Dewatering and Remediation Wastewater Attachment B_POTW Notification Cert Attachment D Discharge Information Attachment D3_Dewatering Remediation Screening Tables Attachment I Subscriber Agreement Form
Subsurface Disposal Systems Re-Issued 10/13/2021 Expiration Date: 10/12/2031 Subsurface Disposal Systems Fact Sheet	Subsurface Disposal Systems Word Subsurface Disposal Systems PDF	N/A	10/13/21	Coastal Consistency Review Form Natural Diversity Database Review
Swimming Pool Wastewater Reissue Date: 07/10/2024 Effective Date: 08/01/2024 Expiration Date: 07/31/2029 Swimming Pool Wastewater Fact Sheet	N/A	N/A

Stormwater General Permits

*Effective January 20, 2016 - DEEP's ezFile on-line system should be used to submit stormwater construction and industrial general permit registration(s). Please refer to the Construction Stormwater page or the Industrial Stormwater page for details on using ezFile.

Stormwater General Permits

General Permit Type and Other Related Information	Registration Forms	Instructions	Last Revised	Required Common Forms and Other Related Forms
Stormwater Associated with Commercial Activity Reissued:10/01/2025 Effective Date: 12/01/2025 Expiration Date: 09/30/2030 For important information concerning registration under the new GP refer to the Commercial Stormwater GP Website: Commercial Stormwater GP For assistance, contact the DEEP Commercial Stormwater Program at DEEP.StormwaterCommercial@ct.gov List of General Permits Fact Sheet Commercial Stormwater GP Notice of Issuance Fact Sheet Related Guidance: Multi-Media Solar Comprehensive Program Permitting Factsheet	Submit a Commercial Stormwater Registration Existing Permittees: Register by April 1, 2026 Existing Sites Without Coverage: Register by December 1, 2026 New Sites: Apply ≥ 60 days before starting commercial activity	N/A		Commercial Stormwater Plan Guidance and Template Guidance for Street Sweepings and Catch Basin Cleanings
Stormwater from Construction Activities For information refer to the Construction Stormwater General Permit website Issued: 1/1/2026 Effective Date: 1/1/2026 Expiration Date: 12/31/2030 Stormwater from Construction Activities Fact Sheet	Submit a Construction Stormwater Registration Existing Permittees & Sites are required to apply by April 1, 2026 or submit a Notice of Termination.			Appendix D Coastal Management Act Determination From Notice of Termination - Non-Solar Projects Notice of Termination - Solar Projects Notice of Change Form
Stormwater Associated with Industrial Activities Reissued:10/01/2025 Effective Date: 11/01/2025 Expiration Date: 09/30/2030 For important information concerning registration under the new GP refer to the Industrial Stormwater GP Website: Industrial Stormwater GP For assistance, contact the DEEP Industrial Stormwater Program at DEEP.StormwaterIndustrial@ct.gov Stormwater Associated with Industrial Activities Fact Sheet	Submit an Industrial Stormwater Registration Registration Opens November 1, 2025 Existing Permittees: Register by April 1, 2026	Status of Industrial Stormwater General Permit Registrations Status of No Exposure Certifications		Stormwater Monitoring Reports Pollution Prevention Plan Guidance Document
Stormwater from Small Municipal Separate Storm Sewer Systems (MS4) Reissued without Modifications: 09/29/2023 Effective Date: 10/01/23 Expiration Date: 09/30/25 Stormwater from Small Municipal Notice of Issuance Fact Sheet	Notice of Issuance Fact Sheet Word Notice of Issuance Fact Sheet PDF	N/A	01/11/17	Related Forms: MS4 Annual Report Transmittal Form MS4 Annual Report Transmittal Form Word MS4 Annual Report Transmittal Form PDF
Stormwater from Department of Transportation Separate Storm Sewer Systems Issued: 05/24/2018 Effective: 07/01/2019 Expiration: 06/30/2024	N/A	N/A		N/A

Permits and Licenses DEEP Contacts

Connecticut Department of Energy & Environmental Protection

Water Discharge Permits and General Permits