💧 ZIP Water Report

Tap water in Hamilton, MT — ZIP 59840

2 public water systems serving about 6,510 people. PFAS "forever chemicals" have been detected here.

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Excellent
PFAS detected: at least one system serving this ZIP reported PFAS in EPA UCMR 5 testing. Levels and the 2024 federal limits are shown per system below.

Water systems serving 59840

Hamilton City Of
PWSID MT0000234 · serves 5,660 · groundwater
0 health-based / 0 total violations (5 yrs) · PFAS up to 3.1 ppt
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Kohala Ranch Water Co.
PWSID HI0000151 · serves 850 · groundwater
0 health-based / 0 total violations (5 yrs)
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Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology