These regulations apply to all Massachusetts dental practices and facilities that generate or discharge wastewater from mercury amalgam-related processes.

310 CMR 73.00: Amalgam Wastewater & Recycling  pdf format of 310 CMR 73.00: Amalgam Wastewater  & Recycling

These regulations were last amended in March 2006.

Dental Program Contacts

eDEP Online Filing:

Lee Andrews, 617-292-5647

Amalgam Recycling & Wastewater:

Veronica Wancho O'Donnell, 617-574-6859
Geri Lambert, 617-292-5979

By Email:


310 CMR 73.00: Recently Promulgated Amendments

  • There have been no recent amendments to these regulations.

Dental Amalgam/Mercury Recycling Program

Massachusetts dental practices and clinics that place or remove amalgam fittings are required to certify annually that they have, operate and maintain amalgam separator systems to remove mercury from their wastewater discharges.

Notice of One-Year Dental Amalgam/Mercury Recycling Certification Deferral links to PDF file

Image of Alert Triangle

All Massachusetts dental facilities with 2015 and 2016 deadlines for submitting certifications now have until December 31, 2016 to submit their certifications to MassDEP.  MassDEP will advise dental facilities when the online certification forms are available.

About the Dental Program

The program was intended to reduce the amount of mercury released into the environment by Massachusetts dental practices and facilities.

How to Comply

The Dental Amalgam/Mercury Recycling program applies to dental practices or facilities that place or remove mercury amalgam fillings.

Dental Certification Forms, Instructions & Filing Schedule

How and when dental facilities must submit their dental amalgam/mercury recycling compliance certifications.

eDEP Online Filing

A secure site for submitting environmental permits, transmittals, certifications, and reports electronically to MassDEP.

Amalgam Separators

These devices remove particles of mercury amalgam from wastewater before it is discharged to sewers.

Amalgam Mercury Recyclers

All amalgam waste generated at dental practices and facilities must be sent to recyclers that reclaim mercury from the amalgam waste material.

Recommended Best Practices for Handling Amalgam & Mercury Wastes  pdf format of Recommended Best Practices
doc format of                             Recommended Practices: Handling Amalgam & Mercury Waste

Guidelines developed by the Massachusetts Water Resources Authority with assistance from the Massachusetts Dental Society and support from MassDEP.