💧 ZIP Water Report

Tap water in Williston, ND — ZIP 58801

2 public water systems serving about 31,528 people. PFAS "forever chemicals" have been detected here.

B
Good
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 58801

Williston City Of
PWSID ND5301012 · serves 26,426 · surface water
0 health-based / 0 total violations (5 yrs)
A
Northwest Rural Water District
PWSID ND5301079 · serves 5,102 · surface water
0 health-based / 2 total violations (5 yrs) · PFAS up to 6.3 ppt
B

Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology