Dental facilities that discharge wastewater into the Spokane County sanitary sewer system must be in compliance with County discharge limits and Environmental Protection Agency (EPA) regulations. The EPA put into effect the Dental Office Category Rule codified at 40 CFR Part 441 (§441) on July 14, 2017, to reduce discharges of mercury from dental offices.
Dental Discharger Requirements
Ensure the removal of dental amalgam solids from all amalgam process wastewater via amalgam separator(s) or equivalent device(s) that meet the standard of the rule. See §441.30(a) (1-2) for an existing source and §441.40 for a new source.
Implementation of two best management practices. See §441.30(b) for an existing source and §441.40 for a new source.