Is Saint John, North Dakota tap water safe?
2 water systems report serving Saint John. Your water depends on which one serves your address. Check your bill if unsure. This list is matched from the ZIP codes in this place, so it may include nearby systems.
C
Belcourt-Turtle Mtn Rural Water System
Serves 13,500 people · Groundwater · Full report →
1 health-based violation in the last 5 years; 44 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2026).
A
City of St John
Serves 341 people · Groundwater · Full report →
No health-based violations in the last 5 years; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2025).