F1/100
LEMONT — Water Quality Report 2026
Serving 17,500 people · Illinois
Water Source
Groundwater
County
—
System ID
IL0311620
Violations
36
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.024 mg/L | 0.015 mg/L | Over Limit |
strontium | 2369.86 µg/L | — | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2023 – February 27, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About LEMONT
Is LEMONT water safe to drink?
LEMONT water receives a grade of F (1/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 36 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has LEMONT detected?
66 contaminants were tested in LEMONT's water. Notable contaminants include Lead (90th percentile), strontium. 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does LEMONT have any EPA violations?
Yes, LEMONT has 36 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, MCL, Other. 13 are health-based violations.
How many people does LEMONT serve?
LEMONT serves approximately 17,500 people, Illinois. The system provides water to 1 community: Lemont.
What type of water does LEMONT provide?
LEMONT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0311620.
How does LEMONT compare to other utilities in Illinois?
LEMONT scores 1/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Illinois state page for a full comparison of water systems.