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Dental Mercury Reduction

Dental practices that place or remove amalgam fillings (which can contain from 40% to 50% mercury) are a controllable source of mercury that impacts the City’s sewer systems. Consequently, all dental offices that are connected to the City and County of San Francisco’s sanitary sewer system are required to reduce their discharge of dental amalgam wastes to the lowest practicable level.

The San Francisco Public Utilities Commission (SFPUC), Pretreatment Program, has issued a general permit for all  facilities.  This streamlined approach will eliminate the need for dental facilities to fill out waste discharge permit applications.  If you are a dental facility operating within the City and County of San Francisco, this general permit applies to you.

This general discharge permit still has the regulatory authority to enforce discharge regulations and still requires dental facilities to follow established Best Management Practices (BMP's), and install and maintain their dental amalgam separators.

A percentage of dental facilities will be inspected to help measure the success of the general discharge permit approach.

More Program Documents

For more information about the Dental Mercury Reduction Program and for assistance completing your application, see the documents below:


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Last updated: 2/10/2020 1:56:27 PM