Regulation 310 CMR 15.000: Septic Systems ("Title 5")

This regulation governs the construction and maintenance of septic systems and the transport of septic-system waste.

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.

Contact for 310 CMR 15.000: Septic Systems ("Title 5")

Septic Systems / Title 5 Contact Information

Table of Contents

Current Regulation

These regulations, 310 CMR 15.000, were amended and became effective as of July 7, 2023.  See links below for final amendments to these regulations.  

Recently Promulgated Amendments - Nitrogen Sensitive Area Provisions

Nitrogen Sensitive Area Amendments

Strategy for Nitrogen Impaired Estuaries

Title 5/Groundwater Stakeholder Group

Presented at the October 8, 2020 Stakeholder Group Meeting:

Meeting Recording | Meeting Presentation

Stakeholder Comments and Submittals

During MassDEP's regulatory review efforts under Executive Order 562, a number of stakeholders asked MassDEP to consider changes to the Title 5 regulations and related changes to the Groundwater Discharge Permitting regulations.

Downloads for 310 CMR 15.000: Septic Systems ("Title 5")

Contact for 310 CMR 15.000: Septic Systems ("Title 5")

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