In December 2016, the EPA issued a final rule requiring most dental offices nationwide to install amalgam separators but withdrew the rule following the White House's Jan. 20 memorandum ordering federal agencies to freeze all new or pending regulations. The rule will be effective July 14 and compliance for most dentists will be July 14, 2020.
The rule mandates that most dental offices install, maintain, and monitor an amalgam separator that complies with the American National Standards Institute (ANSI) American National Standard/American Dental Association (ADA) Specification 108 for Amalgam Separators (2009) with Technical Addendum (2011) or the International Organization for Standardization (ISO) 11143 Standard (2008). You may continue to operate an already installed amalgam separator for its lifetime or ten years (whichever comes first), as long as the you comply with the other rule requirements including the specified Best Management Practices (BMP), operation and maintenance, reporting, and recordkeeping requirements. The date for compliance with this rule for existing offices will be at the end of 2019. Newly purchased or built offices must comply within 90 days of taking ownership.
These ADA member resources will answer many of the questions you have about his new EPA rule.