Is Watertown, South Dakota tap water safe?
2 water systems report serving Watertown. Your water depends on which one serves your address. Check your bill if unsure.
A
Watertown Municipal Utilities
Serves 23,230 people · Groundwater · 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 (2024).
A
Sioux Rural Water System
Serves 4,280 people · Groundwater · Full report →
No health-based violations in the last 5 years; 3 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).