On June 14, 2017, the United States Environmental Protection Agency announced pretreatment standards to reduce discharge of mercury from dental offices into a publicly owned sanitary sewer system. This new federal rule is separate from the state rule, and took effect on July 14, 2017. It applies to most dental offices, with some exceptions. The rule requires offices to submit a one-time certification form
and comply with updated Best Management Practices. For more information, please review this DEQ factsheet
, which includes more information on exceptions to the rule and municipality contact information.