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Prescott staff outline PFAS study focused on Airport Well Field; ADEQ funding may expand scope
Summary
Water operations staff reported Airport Well 5 previously exceeded the EPA’s 4 parts‑per‑trillion MCL, removed that well from service, and described a consultant-led study focused on the Airport Well Field to evaluate hydrogeology, treatment options (GAC, ion exchange, Fluorosorb), pilot testing and disposal issues; ADEQ funding could broaden scope to Chino wells.
City water operations staff updated the subcommittee on an ongoing PFAS consultant contract and a planned technical study aimed primarily at the Airport Well Field.
Nathan Graham, Water Operations Superintendent, summarized the 2022 well testing that detected PFAS in several wells and said Airport Well 5 had the highest levels and was removed from distribution. He noted the EPA’s 2023 regulation established a maximum contaminant level (MCL) of "4 parts per trillion": "They set a maximum contaminant level or an MCL. They set it at 4 parts per trillion." Graham said current sampling shows some wells below…
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