On May 23, 2019 the EPA released a pre-publication notice of proposed rulemaking that seeks public input on a range of options regarding the regulation of perchlorate in public drinking water systems. The agency is seeking comment on a proposed National Primary Drinking Water Regulation (NPDWR) for perchlorate to establish a Maximum Contaminant Level (MCL) and a health-based Maximum Contaminant Level Goal (MCLG) at 56 micrograms per liter.
In addition, the agency is seeking comment on three alternative regulatory options:
Some states have already established MCLs:
To read more about the EPA's proposal and how to submit comments, click here.