B63/100
CARBONDALE — Water Quality Report 2026
Serving 22,107 people · Illinois
Water Source
Surface Water
County
—
System ID
IL0770150
Violations
10
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
5
Violations (last 5yr)
0
Unresolved
2
Health-Related
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: August 27, 2024 – August 30, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2024 – September 10, 2024Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2024 – September 10, 2024Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 2Resolved
Treatment Technique Violation
When: July 1, 2024 – September 30, 2024Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 2Resolved
Treatment Technique Violation
When: April 1, 2024 – June 30, 2024Rule: Stage 1 DBPREnforcement: 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 CARBONDALE
Is CARBONDALE water safe to drink?
CARBONDALE water receives a grade of B (63/100), which is considered good. Out of 69 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CARBONDALE detected?
69 contaminants were tested in CARBONDALE's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CARBONDALE have any EPA violations?
Yes, CARBONDALE has 10 EPA violation(s) on record, with the most recent in 2024. Violation types include Other, MR, TT. 6 are health-based violations.
How many people does CARBONDALE serve?
CARBONDALE serves approximately 22,107 people, Illinois. The system provides water to 1 community: Carbondale.
What type of water does CARBONDALE provide?
CARBONDALE sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is IL0770150.
How does CARBONDALE compare to other utilities in Illinois?
CARBONDALE scores 63/100 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.