2019 Water Quality Standards (WQS) Comments Due

April 5, 2019 @ 3:00 pm – 3:00 pm

2019 Water Quality Standards (WQS) Review

Please submit your comments in writing to DEEP.WQS@ct.gov on or before April 5, 2019.

Link to CT DEEP's webpage
Link to CT DEEP’s webpage

The Connecticut Department of Energy and Environmental Protection (Department) is initiating a review of Connecticut Water Quality Standards (“WQS”). This review is being conducted to evaluate the need to update or revise the WQS in order to remain consistent with state and federal law and to ensure that Connecticut’s WQS continue to reflect the best available science and support sound water quality management policies to improve and protect the water resources of the state.

Your Input is Requested!
The Department is requesting input from all interested parties on any aspect of the WQS that the public believes the Department should consider for potential revision. The comment should include the topic of concern, whether it is currently covered by the WQS, and if so where, any suggested revision and the basis for the suggested revision. Any technical information or reports supporting the comment should be included.

The Department is particularly interested in comments on the portions of the WQS which the Department is evaluating for revision. These topics include:

• Updates to Numeric Water Quality Criteria:
• Revision to the Low Flow Statistic Applicable to Fresh Waters
• Extended Disinfection Periods for Sanitary Discharges
• Definition Highest Attainable Use in Surface Waters
• Protection of Downstream Waters
• Water Quality Classification Map Changes

Learn More at the CT WQS Webpage

Deadline to Comment: April 5th
Comments on the WQS will be accepted from
March 4, 2019 through April 5, 2019.

Comments should be provided via email to


After reviewing any comments received during this Triennial Review, the Department will develop recommended updates to the WQS and initiate a formal regulatory revision process.