Is Hillsdale, Oklahoma tap water safe?
2 water systems report serving Hillsdale. 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.
D
Kremlin-Hillsdale Rural Water District 1
Serves 320 people · Groundwater · Full report →
7 health-based violations in the last 5 years; 9 monitoring/reporting violations; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2026).
C
Hillsdale Pwa
Serves 110 people · Groundwater · Full report →
1 health-based violation in the last 5 years; 10 monitoring/reporting violations; No UCMR 5 PFAS results on file; Lead 90th percentile above the new 10 ppb action level (LCRI, effective Nov 1, 2027); Lead 90th percentile below the action level (2026).