ZIP 01583: your water comes from West Boylston Water District
West Boylston Water District is the only community water system that reports serving ZIP 01583 (Worcester County, Massachusetts) under EPA's UCMR 5. PFAS-4 at the latest sample (2024): 5.4 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.