As anticipated, the Environmental Protection Agency (EPA) announced on June 18, 2020, that it will not regulate perchlorate, a substance primarily found in rocket fuel and munitions, under the Safe Drinking Water Act (SDWA). Before determining to regulate a chemical or substance under the SDWA, the EPA must consider whether (1) the contaminant may have an adverse effect on the health of persons; (2) the contaminant is known to occur or there is a substantial likelihood that the contaminant will occur in public water systems with a frequency and at levels of public health concern; and (3) in the sole judgment of the Administrator, regulation of such contaminant presents a meaningful opportunity for health risk reduction for persons served by public water systems. 42 U.S.C. § 300g-1(b)(1)(A). In its announcement, the EPA concludes that perchlorate does not meet these criteria for regulation.…
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