In 2024–2025, the U.S. Environmental Protection Agency finalized new drinking-water standards and updated cleanup guidance for PFAS (“forever chemicals”), establishing the first-ever enforceable limits for six PFAS compounds under the National Primary Drinking Water Regulations. As these standards move toward full implementation in 2026, they are increasingly shaping environmental due diligence at brownfield and redevelopment sites—particularly former industrial facilities, fire-training areas, and locations with historical use of aqueous film-forming foam (AFFF). In Colorado, PFAS contamination has been detected in multiple water systems, making early sampling, identification, and risk planning essential for communities preparing sites for redevelopment. These evolving federal requirements are expected to influence both assessment practices and potential cleanup strategies across the state.
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