Is Waterloo, Illinois tap water safe?
1 water system report serving Waterloo. Your water depends on which one serves your address. Check your bill if unsure.
B
Waterloo
Serves 10,190 people · Groundwater · Full report →
No health-based violations in the last 5 years; 30 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).