ZIP 18821: your water comes from PA Amer Water CO Susquehanna
PA Amer Water CO Susquehanna is the only community water system that reports serving ZIP 18821 (Susquehanna County, Pennsylvania) under EPA's UCMR 5 (reported by the system to EPA). PFAS-4 at the latest sample (2023): 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.