ZIP 01938: your water comes from Ipswich DPU Water Dept
Ipswich DPU Water Dept is the only community water system that reports serving ZIP 01938 (Ipswich, Essex County, Massachusetts) under EPA's UCMR 5. PFAS-4 at the latest sample (2024): 5.6 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.