A85/100
CALHOUN COUNTY RWD — Water Quality Report 2026
Serving 4,675 people · Illinois
Water Source
Groundwater
County
—
System ID
IL0130010
Violations
8
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2020.
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 CALHOUN COUNTY RWD
Is CALHOUN COUNTY RWD water safe to drink?
CALHOUN COUNTY RWD water receives a grade of A (85/100), 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 CALHOUN COUNTY RWD detected?
31 contaminants were tested in CALHOUN COUNTY RWD's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CALHOUN COUNTY RWD have any EPA violations?
Yes, CALHOUN COUNTY RWD has 8 EPA violation(s) on record, with the most recent in 2020. Violation types include Other, MCL, MR. 1 are health-based violations.
How many people does CALHOUN COUNTY RWD serve?
CALHOUN COUNTY RWD serves approximately 4,675 people, Illinois.
What type of water does CALHOUN COUNTY RWD provide?
CALHOUN COUNTY RWD sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0130010.
How does CALHOUN COUNTY RWD compare to other utilities in Illinois?
CALHOUN COUNTY RWD scores 85/100 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.