ZIP 10550: your water comes from Mount Vernon Water Department
Mount Vernon Water Department is the only community water system that reports serving ZIP 10550 (Mount Vernon, Bronx County and Westchester County, New York) 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.