Is Sioux City, Iowa tap water safe?
2 water systems report serving Sioux City. Your water depends on which one serves your address. Check your bill if unsure.
B
Sioux City Water Supply
Serves 85,791 people · Surface water · Full report →
No health-based violations in the last 5 years; 2 monitoring/reporting violations; Other PFAS above 2024 limits (rule proposed for repeal): PFHxS, Hazard Index; Lead 90th percentile below the action level (2025).
A
Berea Heights Inc
Serves 33 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 (2024).