Connecticut Department of Energy & Environmental Protection

DEEP headquarters at 79 Elm Street in Hartford has partially re-opened to staff and members of the public as of Tuesday, February 3. The DEEP records room has re-opened. The DEEP Central Permit Processing Unit (CPPU) will be open to the public starting on Wednesday, Feb. 4. For updates, click here

Emissions Trading

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  • Emission Reduction Credits

    Emission Reduction Credits (ERCs) are uncapped trading systems that sources of air emissions earn by reducing emissions below a specified rate. Learn about Continuous Emission Reduction Credits (CERCs), Discrete Emission Reduction Credits (DERCs), and more.

  • Emissions Reduction Credit Registry

    List of available NOx Continuous Emission Reduction Credits (CERCs) registered by the State of Connecticut.