ZIP 01230: your water comes from Great Barrington Fire Dist
Great Barrington Fire Dist is the only community water system that reports serving ZIP 01230 (Berkshire County, Massachusetts) under EPA's UCMR 5. 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.