Integrated Water Quality Report to Congress

Prepared Pursuant to Clean Water Act Sections 305(b) and 303(d)

The public comment period for the 2020 Draft of the Integrated Water Quality Report has closed. Responses to submitted comments are now available.

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. Connecticut's Consolidated Assessment and Listing Methodology (CALM) is included in this section of the report in chapter 1.

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 2020 IWQR document was Public Noticed for public comment on May 19, 2020, the comment period was open from May 19,2020 to June 19, 2020. In lieu of a public meeting at 79 Elm Street, Hartford, (due to COVID 19) a public informational meeting took place  via ZOOM on June 5, 2020 from 10:30 AM- 12:00 pm. All comments were received by rebecca.jascot@ct.gov and summarized by CTDEEP staff. 

IWQR Meeting Recording:

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Presentation Slides

This Report was prepared by CT DEEP to fulfill requirements of the Federal Clean Water Act (CWA) under Sections 305(b) and 303(d), administered by the US EPA. The final document has been submitted to the federal Environmental Protection Agency (US EPA) following the Department’s consideration of comments received. 

2020 Integrated Water Quality Report

• 2020 IWQR Factsheet
• Final 2020 Connecticut Integrated Water Quality Report 
• Final 2020 Appendix A-1 Connecticut 305b Assessment Results for Rivers and Streams
• Final 2020 Appendix A-2 Connecticut 305b Assessment Results for Lakes
• Final 2020 Appendix A-3 Connecticut 305b Assessment Results for Estuaries
• Final 2020 Appendix A-4 Site Specific Fish Consumption Advisories
• Final 2020 Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)
• Final2020 Appendix B-2Waterbodies with Adopted TMDLs (EPA Category 4a)
• Final 2020 Appendix B-3 Pollution Control Measures for Waterbody Segments (EPA Category 4b)
• Final 2020 Appendix B-4 Nonpollutant Impairments (EPA Category 4c) Nonpollutant Impairments (EPA Category 4c)
• Final 2020 Appendix B-5 Reconciliation List of Impaired Waters (Delistings and Listings)
• Final 2020 Appendix C-1 Priority List of Waters for Action Plan Development
• Final2020 Appendix C-2 IWRM Comments and Responses
• 2020 IWQR Response to Comments

 Previous Integrated Water Quality Reports

Below is a list of archived reports published prior to the most current report.

• 2018 IWQR Factsheet
• 2018 CT Integrated Water Quality Report 
• 2018 CT IWQR Appendix A-1 Connecticut 305b Assessment Results for Rivers and Streams
• 2018 CT IWQR Appendix A-2 Connecticut 305b Assessment Results for Lakes
• 2018 CT IWQR Appendix A-3 Connecticut 305b Assessment Results for Estuaries
• 2018 CT IWQR Appendix A-4 Site Specific Fish Consumption Advisories
• 2018 CT IWQR Appendix A-5 A Method to Identify Total Phosphorus as a Cause of Aquatic Life Impairment in Connecticut Freshwater High Gradient Non-Tidal Streams
• 2018 CT IWQR Appendix B-1 List of Impaired Waters for Connecticut (EPA Category 5)
• 2018 CT IWQR Appendix B-2 Waterbodies with Adopted TMDLs (EPA Category 4a)
• 2018 CT IWQR Appendix B-3 Pollution Control Measures for Waterbody Segments (EPA Category 4b)
• 2018 CT IWQR Appendix B-4 Nonpollutant Impairments (EPA Category 4c)
• 2018 CT IWQR Appendix B-5 Reconciliation List of Impaired Waters (Delistings and Listings)
• 2018 CT IWQR Appendix C-1 Priority List of Waters for Action Plan Development
• 2018 CT IWQR Appendix C-2 List of Waters for Action Plan Development by 2022
• 2018 CT IWQR Appendix C-3 Alternative Approaches to Restoring and Protecting Water Quality
• 2018 public comments received
• 2016 Connecticut Integrated water Quality Report
• 2014 Connecticut Integrated Water Quality Report
• 2012 Connecticut Integrated Water Quality Report
• 2010 Connecticut Integrated Water Quality Report
• 2008 Connecticut Integrated Water Quality Report
• 2006 Connecticut Integrated Water Quality Report
• 2004 Water Quality Report to Congress - Full Report

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.

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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.