Water Quality (305b) Report to Congress
Prepared Pursuant to Clean Water Act Sections 305(b) and 303(d)
Notice is hereby given that the State of Connecticut Department of Energy and Environmental Protection (CT DEEP) is making available the DRAFT State of Connecticut 2026 Integrated Water Quality Report (IWQR) for public review and comment (Public Notice) from October 1,to November 1, 2026. A public meeting will be held on October 6, 2026 at 1:00 p.m-2:30 p.m. via TEAMS. Registration is required. After registering, you will receive a confirmation email containing information about joining the meeting.
Every two years (sometimes referred to as a cycle) Connecticut submits the Integrated Water Quality Report to Congress (IWQR). The report covers two sections of the Clean Water Act (CWA), 305 (b) and 303 (d).
Section 305(b) of the Federal Clean Water Act (CWA) requires each State to monitor, assess and report on the quality of its waters relative to designated uses established in accordance with the Connecticut Water Quality Standards.
Section 303(d) of the CWA requires each State to list waters not meeting water quality standards and prioritize those waters for Total Maximum Daily Load (TMDL) development or other management plans for restoration or protection.
Before each IWQR cycle is finalized and submitted to EPA, CTDEEP conducts an informational meeting and offers an opportunity for the public to review and comment on the report for at least 30 days after the report is public noticed.
The DRAFT 2026 Connecticut Integrated Water Quality Report is now available. A public comment period will be open from October 1, 2026 to November 1, 2026. A public meeting will be held via TEAMS on October 6, 2026 from 1:00 p.m. - 2:30 p.m. (Eastern Time (US and Canada). Registration is required. Comments must be submitted in writing and directed to Rebecca Jascot at DEEP.IWQR@ct.gov on or before November 1, 2026.Please use subject line "DRAFT 2026 IWQR Comments." Responses to Comments will be reviewed and summarized by the Department. Thank you for your participation.
2026 IWQR Documents
- Public Notice
- Presentation slides
- DRAFT 2026 IWQR Report
- DRAFT 2026 IWQR Factsheet
- Appendix A-1. Draft 2026 Connecticut 305b Assessment Results for Rivers and Streams
- Appendix A-2. Draft 2026 Connecticut 305b Assessment Results for Lakes
- Appendix A-3. Draft 2026 Connecticut 305b Assessment Results for Estuaries
- Appendix A-4. Draft 2026 Connecticut 305b Site Specific Fish Consumption Advisories
- Appendix B-1. Draft 2026 List of Impaired Waters for Connecticut (EPA Category 5 and 5R)
- Appendix B-2. Draft 2026 Waterbodies with WQAP (includes Adopted TMDLs (EPA Category 4a), Advance Restoration Plans, and Protection Plans)
- Appendix B-3. Draft 2026 Pollution Control Measures for Waterbody Segments (EPA Category 4b)
- Appendix B-4. Draft 2026 Nonpolluting Impairments (EPA Category 4c)
- Appendix B-5. Draft 2026 Reconciliation List of Impaired Waters (Delistings, Listings, Additions and Removals)
- Appendix C-1. Draft 2026 Priority List of Waters for Action Plan Development 2026-2028 (including TMDL development)
- Appendix D-1. State and Tribal Waters in Connecticut
DEEP Water Quality Planning Information Listserv
The Connecticut Department of Energy and Environmental Protection uses the Department web site to provide information about topics pertaining to water quality based programs within Connecticut. If you would like to receive notice of water quality program updates by e-mail, please subscribe to the Water Quality Planning (WQP) Information listserv. Each time the web site is updated with materials relative to water quality based programs, you will receive an email notification with a link to the pertinent web page. To remove your name from the listserv, follow the unsubscribe steps outlined below.
How to Subscribe to the WQP Listserv
If you have an e-mail signature, header, and/or footer set up to be automatically included in emails, you will need to delete these before sending the subscribe request. Send an email to Listserv@List.CT.gov
Leave the subject line blank and in the body of the message type:
Subscribe DEEP_WQPlanning YourFirstName YourLastName
Substitute your first and last name in the text above when sending. You will receive an e-mail confirmation that you have successfully subscribed to the listserv.
How to Unsubscribe to the WQP Listserv
Requests to unsubscribe must be sent from the same email account used when subscribing to the email list. Send an e-mail to Listserv@List.CT.gov
Leave the subject line blank and in the body of the message type:
Unsubscribe DEEP_WQPlanning YourFirstName YourLastName
Substitute your first and last name in the text above when sending. You will receive an e-mail confirmation that you have been removed from the listserv.
CT DEEP is an Affirmative Action and Equal Opportunity Employer that is committed to complying with the Americans with Disabilities Act. To request an accommodation contact us at 860-418-5910 or DEEP.Accommodations@ct.gov.
Content last updated September 22, 2026