ZIP 48054: your water comes from St. Clair Water and Sewer Authority

St. Clair Water and Sewer Authority is the only community water system that reports serving ZIP 48054 (St. Clair County, Michigan) 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.

See the full PFAS results for St. Clair Water and Sewer Authority