Is Hillsboro, Illinois tap water safe?
3 water systems report serving Hillsboro. Your water depends on which one serves your address. Check your bill if unsure.
B
Hillsboro
Serves 4,402 people · Surface water · Full report →
No health-based violations in the last 5 years; 7 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2026).
A
Graham Correctional Site
Serves 2,155 people · Surface water · Full report →
No health-based violations in the last 5 years; No UCMR 5 PFAS results on file.
C
Ej Water-Mcwc
Serves 2,083 people · Surface water · Full report →
3 health-based violations in the last 5 years; 1 monitoring/reporting violation; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2025).