A94/100
CLARK-EDGAR RWD — Water Quality Report 2026
Serving 5,801 people · Illinois
Water Source
Groundwater
County
—
System ID
IL0230010
Violations
3
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2011.
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 CLARK-EDGAR RWD
Is CLARK-EDGAR RWD water safe to drink?
CLARK-EDGAR RWD water receives a grade of A (94/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CLARK-EDGAR RWD detected?
31 contaminants were tested in CLARK-EDGAR RWD's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CLARK-EDGAR RWD have any EPA violations?
Yes, CLARK-EDGAR RWD has 3 EPA violation(s) on record, with the most recent in 2011. Violation types include Other, MR.
How many people does CLARK-EDGAR RWD serve?
CLARK-EDGAR RWD serves approximately 5,801 people, Illinois.
What type of water does CLARK-EDGAR RWD provide?
CLARK-EDGAR RWD sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0230010.
How does CLARK-EDGAR RWD compare to other utilities in Illinois?
CLARK-EDGAR RWD scores 94/100 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.