Reproducible analysis and derived data for PFAS occurrence and service-area demographic patterns in U.S. community water systems, 2023–2025

Reproducible analysis code, processed system-level inputs, frozen derived results, publication tables, figure sources, tests, and source provenance supporting the manuscript “PFAS Occurrence Relative to Federal Drinking-Water Benchmarks and Service-Area Demographic Patterns in U.S. Community Water Systems, 2023–2025.” The unit of inference is the community water system. The primary outcome is whether a system had at least one complete-set sampling location meeting an EPA January 2026 technical comparison based on the April 2024 PFAS rule. This release does not estimate household service, tap concentration, individual exposure, disease risk, causality, or regulatory compliance.