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Aurora Water outlines PFAS response: testing certification, treatment strategy and grant pursuit
Summary
Aurora Water staff summarized multi-year PFAS monitoring and treatment steps, described current testing certification with CDPHE, outlined treatment approaches (GAC and ion exchange) to meet the EPA MCL and said the utility is pursuing state revolving fund grants for construction and design.
Aurora Water staff presented an update on per- and polyfluoroalkyl substances (PFAS) management, testing and treatment steps the utility has undertaken since national guidance changed in 2016–2024.
Earl Wilkinson, assistant general manager of water operations, and other staff reviewed the regulatory history: the EPA began surveying PFAS as unregulated contaminants in 2014; interim health advisories for PFOA and PFOS appeared in 2016 (70 parts per trillion advisory at that time). In 2022 and 2023 the EPA moved through further advisory and rulemaking steps; a federal maximum contaminant level (MCL) for PFOA/PFOS of 4 parts per trillion is now the current regulatory ceiling staff are managing toward.
Staff recounted near-term operational changes…
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