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Proposed Amendments to
Industrial Pretreatment Regulations

Massachusetts Water Resources Authority

MWRA is proposing to amend the following regulations: Sewer Use (360 CMR 10.000). On February 21, 2024, the MWRA Board of Directors authorized MWRA staff to publish notice of the proposed amendments for public comment.

MWRA’s Sewer Use Regulations are required by EPA for its Industrial Pretreatment Program, which is administered by MWRA’s Toxic Reduction and Control (TRAC) department.  The Sewer Use Regulations are derived from EPA’s federal pretreatment regulations found at 40 CFR Part 403, et seq., and set conditions for use of MWRA and municipal sewers, including charges for obtaining and holding a permit.  They also provide for enforcement for noncompliance with MWRA regulations and permits.

Public Notice

The Massachusetts Water Resources Authority (MWRA), pursuant to its authority under St. 1984, c.372, §§ 6 and 8, as amended, and in accordance with M.G.L. c. 30A, will hold a public hearing on proposed amendments to its Sewer Use Regulations, 360 CMR 10.000.

These proposed amendments: a) b) c) incorporate changes required by the U.S. Environmental Protection Agency (“EPA”) to bring MWRA’s Sewer Use Regulations in conformance with EPA’s Pretreatment regulations; increase annual charges paid by permit holders; and clean up minor typos.

All persons desiring to provide oral testimony are hereby notified to appear at 10:00 am on Friday, May 3, 2024 at the MWRA, 2 Griffin Way, Chelsea, Massachusetts 02150 (photo ID required). Remote participation is also available via WebEx.

Please register to receive an email with the meeting link here.

To request interpretive services please contact by Wednesday May 1, 2024.

An electronic copy of the proposed amendments has been posted to MWRA’s website:
An electronic copy of the proposed amendments may be requested by sending an e-mail to

MWRA will accept oral and written comments at the hearing.

In addition, MWRA will accept written comments until 5:00 pm on Friday, May 10, 2024, by mail or hand delivery to: Matthew Dam Massachusetts Water Resources Authority Toxic Reduction and Control 2 Griffin Way Chelsea, MA 02150 or by e-mail to:

Proposed Revisions and Summary (PDF)

MWRA Regulations Revision Summary
360 CMR 10.000, Sewer Use Revisions

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Updated April 29, 2024

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