On June 14, 2017, the United States Environmental Protection Agency (EPA) published Effluent Limitations Guidelines and Standards for the Dental Category (40 CFR Part 441) to reduce discharges of mercury from dental offices into publicly owned treatment works (POTWs). The regulation, which became effective on July 14, 2017, requires dental offices that place or remove amalgam to operate and maintain amalgam separator(s) and must not discharge scrap amalgam or use certain kinds of line cleaners. All existing dental offices (existing sources, whose first discharge to a POTW occurred on or before July 14, 2017) and new dental offices (new sources, whose first discharge to a POTW occur after July 14,2017) must be in compliance.  A copy of the regulation can be found on the Electronic Code of Federal Regulations website.

In accordance with this regulation, the Sanitation Districts have a dental office certification program. All existing and new dental offices that are connected to a sewer in the Sanitation Districts’ service area are required to complete a form called the “One-Time Compliance Report for Dental Dischargers.” For existing sources, a One-Time Compliance Report must have already been submitted or be submitted within 90 days after a transfer of ownership. For new sources, a One-Time Compliance Report must be submitted to the Control Authority no later than 90 days following the introduction of wastewater into a POTW.

The Sanitation Districts do not charge a fee in relation to the dental office certification program.

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