This page, Electricity Generator Emissions Limits (310 CMR 7.74), is part of
This page, Electricity Generator Emissions Limits (310 CMR 7.74), is offered by

Guide Electricity Generator Emissions Limits (310 CMR 7.74)

This regulation establishes a declining limit on carbon dioxide (CO2) emissions from large power plants in Massachusetts. The limit ensures that state programs, including the Clean Energy Standard, reduce greenhouse gas emissions.

Table of Contents

Current Regulation

310 CMR 7.74: Reducing CO2 Emissions from Electricity Generating Units was finalized in August 2017, amended in both December 2017 and August 2018, and repromulgated in December 2020.

See 310 CMR 7.00: Air Pollution Control, which includes the current Electricity Generating Units regulation.

Additional Resources for Current Regulation

Massachusetts Carbon Allowance Registry & Auctions

The Carbon Allowance Registry tracks allowances for large power plants in Massachusetts for purposes of satisfying the requirements of 310 CMR 7.74: Reducing CO2 Emissions from Electricity Generating Facilities.

Administered by MassDEP, the Allowance Registry enables Designated Representatives to register their facilities, receive or transfer allowances, and manage their allowance holdings.

Electricity Generating Facilities may purchase allowances in Allowance Auctions. Purchased allowances can be used for compliance with 310 CMR 7.74 beginning in 2019.

See Key Actions below for access to the Allowance Registry and information about the Carbon Allowance Auctions process.

A training video on how to use the Allowance Registry system, along with related reporting and compliance forms, are available in Available Resources below.

Additional Resources for Massachusetts Carbon Allowance Registry & Auctions

Carbon Allowance Market Monitor Auction Reports

The Market Monitor provides written reports (see Additional Resources below) on the outcomes of Carbon Allowance Registry allowance auctions.

Additional Resources for Carbon Allowance Market Monitor Auction Reports

Carbon Allowance Market Monitor Quarterly Reports

The Market Monitor provides written reports (see Additional Resources below) on the allowance market, including transfers in the Carbon Allowance Registry, as well as the conduct and outcomes of allowance auctions.

Additional Resources for Carbon Allowance Market Monitor Quarterly Reports

Feedback