CT’s New Release-Based Cleanup Regulations

Connecticut (CT) has adopted the Release-Based Cleanup Regulations (RBCRs), a major change to how environmental contamination is managed statewide. The regulations were adopted on May 16, 2025 and take effect March 1, 2026.

What the New Regulations Cover

The CT General Assembly directed the state’s Department of Energy and Environmental Protection (CT DEEP) to phase out the Property Transfer Act and move CT to a release-based cleanup program.

Under Connecticut’s previous framework, environmental investigation and cleanup were often tied to property transfers under the Property Transfer Act. If the transaction did not occur, contamination could remain unaddressed within a regulatory process for long periods.

The new regulations apply to:

• Newly discovered historical contamination
• Existing contamination that poses an immediate risk to health or the environment
• New spills or releases

All releases, whether newly discovered or newly created, must meet the cleanup standards and follow the investigation and remediation process discussed in the RBCRs. The RBCRs consist of specific requirements across sites, improve regulatory clarity, and provide more certainty for property owners, buyers, and lenders.

The RBCR program shifts cleanup responsibility to the point a release is identified rather than when a property changes ownership. This approach is intended to promote more timely remediation, limit the spread of contamination, and reduce the uncertainty that can arise during real estate transactions.

Tools and Resources Available

CT DEEP is providing guidance and tools to support implementation, including:

• Site evaluation and cleanup decision guidance
• Transition information for existing remediation programs
• The REACT portal for tracking and managing cleanup activities
• Training on reporting requirements and system use

Preparing for the March 2026 Effective Date

With implementation approaching, early preparation is recommended. Regulated entities should:

• Review how RBCR requirements apply to their properties or operations
• Understand changes to release reporting and cleanup oversight
• Prepare to use the REACT tracking system
• Monitor CT DEEP guidance and training opportunities

Planning ahead can help reduce compliance issues and avoid delays in redevelopment or remediation projects.

How Walden Can Help

Walden assists clients with environmental compliance, remediation strategy, and regulatory coordination. Our team can help you understand how the RBCRs apply to your site and support your transition to the new framework. Contact us at 860-846-4069 to speak with a knowledgeable consultant about these changes today.