ZIP 01520: your water comes from Holden Water Division, DPW
Holden Water Division, DPW is the only community water system that reports serving ZIP 01520 (Worcester County, Massachusetts) under EPA's UCMR 5. PFAS-4 at the latest sample (2024): 4.9 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.