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US EPA Update: Perchlorate in Drinking Water

On June 18, 2019,  the U.S. Environmental Protection Agency (EPA) issued a final action regarding the regulation of perchlorate under the Safe Drinking Water Act (SDWA). Considering the best available science and the proactive steps that EPA, states and public water systems have taken to reduce perchlorate levels, the agency has determined that perchlorate does not meet the criteria for regulation as a drinking water contaminant under the SDWA. Therefore, the agency is withdrawing the 2011 regulatory determination and is making a final determination to not issue a national regulation for perchlorate at this time.

EPA also performed a new health impact analysis based on recommendations from the Science Advisory Board. The new analysis shows that the concentrations at which perchlorate may present a public health concern are higher than the concentrations considered in the 2011 regulatory determination.

The updated occurrence information and the new health impact analysis are the best available information. Based on this updated data and analysis, EPA is making a final determination that perchlorate is not found in drinking water with a frequency and at levels of public health concern to support a meaningful opportunity for health risk reduction through a national perchlorate drinking water regulation.

For more visit: https://www.epa.gov/sdwa/perchlorate-drinking-water

Pre-Publication of Federal Register Notice: https://www.epa.gov/sdwa/drinking-water-notice-final-action-perchlorate

Patti Kay Wisniewski

Drinking Water Preparedness and Resiliency Coordinator

US EPA Region 3

Drinking Water Section (3WD21)

1650 Arch Street

Phila, PA  19103

215-814-5668

Cell: 215-514-7893

Email: Wisniewski.patti-kay@epa.gov

(note the hyphen appears in email only)

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