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Connecticut Remediation Standard Regulations

Connecticut's Remediation Standard Regulations (RSRs) specify the standards for the remediation of environmental pollution in soil and groundwater.

Remediation Standard Regulations, as amended February 16, 2021
Remediation Standard Regulations Fact Sheet

Please see Environmental Use Restrictions (“EUR”) for the revised EUR regulations.

With the 2021 adoption of the amendments to the RSRs and the EURs, Connecticut stands poised to accelerate the pace of the cleanup of pollution that threatens human health and the quality of our environment.  The adoption of these regulations provides much needed flexibility and cost savings for property owners engaged in the remediation of polluted soil and groundwater while maintaining or increasing the degree of protectiveness of cleanup efforts in Connecticut.  In general, all applications for an ELUR or Notice of An Activity and Use Limitation, and all verifications submitted after February 16, 2021 will be subject to the newly revised regulations.

Affirmative Responsibility to Clean up Pollution in Connecticut

Wave 2 RSRs & EUR Regulations Q&A

The revised RSR FAQs provide context for the updates and answer frequently asked questions.

Red-line/[Blue-line] Version of the RSRs - contains deleted/moved language in bracketed blue text and added/moved language in underlined red text.  This version of the Revised RSRs is unofficial and made available for the convenience of the reader.

RSRs with Indents - text of the RSRs with subsections and subparagraphs indented for readability.  This version of the RSRs is unofficial and made available for the convenience of the reader.

Alternative Groundwater Protection Criteria Map in GIS format

Variances Under the RSRs

Electronic Document Transmittal Form - must be the cover page for all Remediation documents uploaded into the Connecticut Secure File Transfer (SFT) website.  It replaces the RSR Approval Request or Notice Transmittal Form. 

Additional Information

Transmittal of Documents - Instructions and forms for use in electronic and hardcopy submittals.

Remediation Standard Regulations Course (October 2020) - PowerPoint presentation developed for EPOC's RSR course

Trichloroethylene (TCE) Developmental Risks - joint guidance from DPH and DEEP (Feb 2015)

Emerging Contaminants

Green Remediation

Regulatory Clarification: Asphalt Millings are Not Clean Fill (October 2006)

Technical Support Document for Extractable Petroleum Hydrocarbon Fractions Using the ETPH Analytical Method and Criteria Development

Connecticut Water Quality Standards - The RSRs were developed to be consistent with the Water Quality Standards and incorporate specific references to them.
Method for Estimating the 7-Day, 10-Year Low Flow of Streams in Connecticut (1982)  - Provides guidance for the self-implementing Alternative SWPC calculation specified in the RSRs section 22a-133k-3(b)(3)(A)
1996 Criteria Derivation - Technical Supporting information on the derivation of the risk-based criteria from the 1996 Remediation Standards Regulations

Content last updated October 1, 2021