Is Lemont, Illinois tap water safe?
2 water systems report serving Lemont. Your water depends on which one serves your address. Check your bill if unsure.
D
Lemont
Serves 18,513 people · Groundwater · Full report →
2 health-based violations in the last 5 years; 1 monitoring/reporting violation; 1 not yet resolved; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile ABOVE the action level (2026).
A
Franciscan Sisters of Chicago
Serves 505 people · Groundwater · Full report →
No health-based violations in the last 5 years; 1 monitoring/reporting violation; 1 not yet resolved; No UCMR 5 PFAS results on file; Lead 90th percentile below the action level (2024).