Regulation  310 CMR 22: The Massachusetts Drinking Water Regulations

Date:	10/02/2020
Organization:	Massachusetts Department of Environmental Protection
Regulatory Authority:	MGL Chapter 40, Sections 15B, 38, 39B, 39C, 40, 41, and 41A MGL Chapter 111, Sections 2C, 5E, 5F, 5G, 17, 143, 159, 160, 160A, 160B, 162, and 165 MGL Chapter 114, Sections 35 and 36 MGL Chapter 140, Sections 32B and 32H MGL Chapter 165, Sections 4B and 6
Official Version:	Massachusetts State Bookstore

These regulations protect public water supply sources in Massachusetts. They make sure that our drinking water is safe, fit, and pure.

Current Regulations

These regulations, 310 CMR 22.00, became effective as of October 2, 2020. 

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.

Proposed Amendments & Public Comment

PFAS Maximum Contaminant Level (MCL) Proposed Amendments & Public Comment

Final PFAS MCL Amendments Promulgated October 2, 2020

Redline version of regulations, September 16, 2020
PFAS MCL revisions to 310 CMR 22.00 - redline version

Clean version of regulations, September 16, 2020
PFAS MCL revisions to 310 CMR 22.00 - clean version

Regulatory Documents Published December 27, 2019

MassDEP has filed proposed regulatory changes with the Secretary of State for formal notice and publication in the Massachusetts Register.  MassDEP will begin accepting public comments starting December 27, 2019.  Please see the public notice for more details.

Public Hearing Notice
310 CMR 22.00 PFAS Amendments Public Hearing Notice

Red line version of regulations
310 CMR 22.00 PFAS MCL Amendments Redline Strikeout

Clean version of regulations
310 CMR 22.00 PFAS MCL Amendments

Summary
310 CMR 22.00 Summary of Proposed Regulations and Note to Reviewers

Presentation Slides
PFAS MCL Proposed Regulation Presentation Slides

Technical Support Documents
Per- and Polyfluoroalkyl Substances (PFAS): An Updated Subgroup Approach to Groundwater and Drinking Water Values

PFAS Analytical Methods Proposed Amendments & Public Comment

Drinking Water Regulations Amendments
310 CMR 22.00 PFAS Analytical Methods Amendments Red Line Strikeout

Laboratory Certification Amendments
310 CMR 42.00 PFAS Amendments Red Line Strikeout

Regulations Summary
310 CMR 42.00 and 310 CMR 22.00 Regulation Summary for PFAS Amendments

Public Hearing Notice
310 CMR 42.00 and 310 CMR 22.00 Public Hearing Notice for PFAS Amendments

The Massachusetts Department of Environmental Protection (MassDEP) proposes to revise its regulations at 310 CMR 42.00 for the Certification and Operation of Environmental Analysis Laboratories to add a new certification category for Per- and Polyfluoroalkyl substances (PFAS).  Changes to 310 CMR 22.00, the Drinking Water regulations, are also proposed which will add references to the appropriate laboratory methods to be followed by certified laboratories.  MassDEP is separately proposing revisions to the Timely Action and Fee regulations at 310 CMR 4.00 to create a permit fee category for PFAS laboratory certification.  

Recently Promulgated Amendments

310 CMR 22.00: The Massachusetts Drinking Water Regulations Amendments
Amendments to 22.07C(7) Unregulated Synthetic Organic Contaminants and Analytical Methods, and 22.07G(1) PFAS Analytical Methods, effective June 12, 2020.