B75/100
COAL VALLEY — Water Quality Report 2026
Serving 3,873 people · Illinois
Water Source
Groundwater
County
—
System ID
IL1614260
Violations
6
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.99 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.008 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – November 6, 2024Enforcement: Resolving — corrective action underway
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2023 – December 31, 2023Enforcement: 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 COAL VALLEY
Is COAL VALLEY water safe to drink?
COAL VALLEY water receives a grade of B (75/100), which is considered good. Out of 52 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has COAL VALLEY detected?
52 contaminants were tested in COAL VALLEY's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does COAL VALLEY have any EPA violations?
Yes, COAL VALLEY has 6 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, MCL. 2 are health-based violations.
How many people does COAL VALLEY serve?
COAL VALLEY serves approximately 3,873 people, Illinois. The system provides water to 1 community: Coal Valley.
What type of water does COAL VALLEY provide?
COAL VALLEY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL1614260.
How does COAL VALLEY compare to other utilities in Illinois?
COAL VALLEY scores 75/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Illinois state page for a full comparison of water systems.