Is Stephan, South Dakota tap water safe?
2 water systems report serving Stephan. 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.
A
Mid-Dakota Rural Water
Serves 11,833 people · Surface water · Full report →
No health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
C
Crow Creek Tribal School
Serves 516 people · Surface water · Full report →
1 health-based violation in the last 5 years; 5 monitoring/reporting violations; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2025).