A89/100
EDWARDSVILLE — Water Quality Report 2026
Serving 26,808 people · Illinois
Water Source
Groundwater
County
—
System ID
IL1190250
Violations
8
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Surface water treatment technique failure
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 EDWARDSVILLE
Is EDWARDSVILLE water safe to drink?
EDWARDSVILLE water receives a grade of A (89/100), which is considered excellent. Out of 66 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has EDWARDSVILLE detected?
66 contaminants were tested in EDWARDSVILLE's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does EDWARDSVILLE have any EPA violations?
Yes, EDWARDSVILLE has 8 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR.
How many people does EDWARDSVILLE serve?
EDWARDSVILLE serves approximately 26,808 people, Illinois. The system provides water to 1 community: Edwardsville.
What type of water does EDWARDSVILLE provide?
EDWARDSVILLE sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL1190250.
How does EDWARDSVILLE compare to other utilities in Illinois?
EDWARDSVILLE scores 89/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Illinois state page for a full comparison of water systems.