Data and code for: Handling left-censored PFAS data in surface-water reconnaissance: a reproducible workflow applied to ten sites in the Trinity River headwaters, Texas

Final submission version accompanying the PLOS Water manuscript "Handling left-censored PFAS data in surface-water reconnaissance: a reproducible workflow applied to ten sites in the Trinity River headwaters, Texas" by Asare et al. It contains analytical data, four Python scripts for reproducible table and figure generation, compiled NPDES/DMR summaries, geodata for the site map, and all generated outputs (tables, figures, Supporting Information). The workflow is demonstrated using a single-event synoptic survey of 10 sites in the Trinity River headwaters near Fort Worth, Texas, sampled on 21 December 2025.