Is Wilmington, Illinois tap water safe?
2 water systems report serving Wilmington. Your water depends on which one serves your address. Check your bill if unsure.
B
Wilmington
Serves 5,700 people · Surface water · Full report →
No health-based violations in the last 5 years; 12 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).
A
Patterson (Inc As Wilmington)
Serves 320 people · Groundwater · Full report →
No health-based violations in the last 5 years; 2 monitoring/reporting violations; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2025).