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MAYOR , CITY MANAGER <br /> Valerie Amezcua ;.<?``,°' Alvaro Nunez <br /> MAYOR PRO TEM CITY ATTORNEY <br /> David Penaloza Sonia R.Carvalho <br /> COUNCILMEMBERS CITY CLERK <br /> Phil Bacerra ,� Jennifer L. Hall <br /> Johnathan Ryan Hernandez . <br /> Jessie Lopez , <br /> Thai Viet Phan <br /> Benjamin Vazquez CITY OF SANTA ANA <br /> PUBLIC WORKS AGENCY <br /> 20 Civic Center Plaza• P.O.Box 1988 <br /> Santa Ana,California 92702 <br /> www.santa-ana.org <br /> June 17, 2026 <br /> U.S. Environmental Protection Agency <br /> Office of Water <br /> 1200 Pennsylvania Avenue, NW <br /> Washington, DC 20460 <br /> Re: Opposition to Proposed Rescission of Drinking Water Regulations for PFHxS, <br /> PFNA, HFPO-DA (GenX), and Hazard Index Mixtures — Docket No. EPA-HQ-OW-2025- <br /> 0654 <br /> Dear Administrator and EPA Staff: <br /> On behalf of the City of Santa Ana, California, I respectfully submit this letter opposing <br /> the U.S. Environmental Protection Agency's proposed rescission of drinking water <br /> regulations for perfluorohexane sulfonic acid (PFHxS), perfluorononanoic acid (PFNA), <br /> hexafluoropropylene oxide dimer acid and its ammonium salt (HFPO-DA, commonly <br /> known as GenX chemicals), and Hazard Index mixtures involving these compounds. <br /> The proposed action would eliminate enforceable federal drinking water standards for <br /> contaminants that have been identified as presenting significant risks to human health. <br /> The City of Santa Ana has made a substantial commitment to protecting public health <br /> through the planning, design, construction, and operation of advanced treatment <br /> facilities intended to remove PFAS compounds from drinking water. These investments <br /> reflect our responsibility to provide safe, reliable, and high-quality drinking water to the <br /> residents and businesses we serve. <br /> While we recognize the EPA's stated intent to revisit the regulatory process, the <br /> proposed rescission creates uncertainty for water systems and undermines the <br /> progress that communities across the nation have made in addressing PFAS <br /> contamination. Public water agencies require stable and predictable regulatory <br /> standards to effectively plan long-term infrastructure investments, secure funding, and <br /> maintain public confidence in the safety of drinking water supplies. The removal of <br /> established standards, even temporarily, risks sending the message that protections <br /> against known contaminants are no longer a national priority. <br /> SANTA ANA CITY COUNCIL <br /> Valerie Amezcua David Penaloza Thai Viet Phan Benjamin Vazquez Jessie Lopez Phil Bacerra Johnathan Ryan Hernandez <br /> Mayor Mayor Pro Tem-Ward 6 Ward 1 Ward 2 Ward 3 Ward 4 Ward 5 <br /> yamezcua(O7santa-ana.orq dpBnalOZa(C�santa-ana.orq tphamo)Lnta-ana.orq bvazgueZ(C�isanta-ana.orq iessielopez(C7santa-ana.orq pbacerra(O7santa-ana.orq rvanhemandeZ(@santa-ana.orq <br />