ZIP 18964: your water comes from North Penn Water Authority
North Penn Water Authority is the only community water system that reports serving ZIP 18964 (Bucks County and Montgomery County, Pennsylvania) under EPA's UCMR 5 (reported by the system to EPA). PFAS-4 at the latest sample (2025): 5.1 ng/L. 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.