Regulation 310 CMR 7.00: Air Pollution Control

These regulations establish emission limits, pollution control standards, and permit requirements for a range of facilities and activities. MassDEP implements these rules to prevent and control air pollution where it originates. This ensures abundant clean air for Massachusetts residents, workers, and visitors.

Table of Contents

Current Regulations

These regulations were last amended in September 2023 (Large Entity Reporting Requirement). MassDEP has proposed additional amendments listed below.

310 CMR 7.00: Air Pollution Control (reflects September 2023 and earlier amendments)

Note: This is an unofficial version of Commonwealth regulations and is posted here for the convenience of the public. It is not an official statement of the regulations.

Closed for comment: 310 CMR 7.02(14)

MassDEP is proposing to amend 310 CMR 7.00 Air Pollution Control to require a cumulative impact analysis (CIA) for Comprehensive Plan Approval (CPA) applications for facilities located in or near environmental justice (EJ) populations.  The proposed CIA requirements are contained in a new section, 310 CMR 7.02(14), and include enhanced public outreach to and involvement of environmental justice populations, assessment of existing community conditions, and analysis of cumulative impacts.

    Closed for comment: 310 CMR 7.74

    MassDEP is proposing to amend 310 CMR 7.74: Reducing CO2 Emissions from Electricity Generating Facilities. The proposed amendments address CO2 emissions attributable to the production of useful net thermal energy by facilities regulated under 310 CMR 7.74.

    • 310 CMR 7.74: Reducing CO2 Emissions from Electricity Facilities Amendments
    Background Document
    Public Notice: English | Español | Português | Kreyòl Ayisyen | ភាសាខ្មែរ | 中文 | Tiếng Việt
    Virtual Public Hearings: February 15, 2023
    Public Comment Period: Ends February 27, 2023

      Closed for comment: 310 CMR 7.24(3)

      MassDEP has proposed revisions to 310 CMR 7.24(3): Dispensing of Motor Vehicle Fuel that would update the list of California Air Resources Board (CARB) Stage I enhanced vapor recovery (EVR) systems and components approved for installation in Massachusetts.

      Recently Promulgated Amendments

      September 2023

      MassDEP promulgated new regulation 310 CMR 7.41: Large Entity Reporting Requirement.

      March 2023

      November 2022

      MassDEP finalized amendments to 310 CMR 7.71: Greenhouse Gas Reporting and 310 CMR 7.75: Clean Energy Standard.

      October 2022

      MassDEP finalized amendments to 310 CMR 7.75: Clean Energy Standard that would provide regulated entities with additional certainty on the need to accelerate the schedule for decarbonizing the electricity supply.

      March 2022

      Help Us Improve with your feedback