ZIP 15438: your water comes from Muni Auth of Washington TWP
Muni Auth of Washington TWP is the only community water system that reports serving ZIP 15438 (Fayette County, Pennsylvania) under EPA's UCMR 5 (reported by the system to EPA). PFAS-4 at the latest sample (2025): below the 3 to 4 ng/L reporting limit. Systems report their own ZIP lists to EPA; if your water bill names another utility, that utility's page carries its own results.
Where this ZIP is
This site is a data project, not an official source. If in doubt, check with your water supplier or local authority.