Dental Dischargers

The Dental Rule (EPA)

The Environmental Protection Agency (EPA) published the Dental Rule on June 14, 2017 requiring dental offices that discharge wastewater that contains dental amalgam to the sanitary sewer system to install, inspect, and maintain a dental amalgam separator. The rule applies to dental offices, dental schools, and dental clinics.

New Dental Offices

All new dental offices shall complete and submit a One-Time Compliance Report for Dental Dischargers to Environmental Services. If you have questions, contact Duy Vu, Environmental Manager, at (972) 291-5126, ext. 2819 or via email.

The Dental Rule FAQ

Who is affected?

Applies to: dental offices, dental schools, dental clinics, government operated dental facilities. Does NOT apply to: mobile units, practices consisting ONLY of oral pathology, oral & maxillofacial radiology/surgery, orthodontics, periodontics, or prosthodontics.

What kind of amalgam separator is required?

Amalgam separators compliant with ISO11143 (2008); ANSI/ADA 108-2009; or, amalgam removal devices that determine the removal efficiency of the device using the procedures found in 40 CFR 441.30(a)(2)(i)-(ii). Amalgam separators or amalgam removal devices must achieve 95% removal efficiency.

What is the estimated annual cost incurred by the dental office?

The EPA estimates the annual cost of operating an amalgam separator or amalgam removal device to average $800 annually.

Does the one-time compliance report transfer?

NO.  The new owner must return a one-time compliance report within 90 days after a transfer of ownership.