A84/100
HERRIN — Water Quality Report 2026
Serving 12,747 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL1990400
Violations
5
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.016 mg/L | 0.015 mg/L | Over Limit |
chlorate | 292.09 µg/L | — | Above Goal |
EPA Violation History
4
Violations (last 5yr)
2
Unresolved
0
Health-Related
TIER 3Unresolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 2, 2025Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2025 – September 3, 2025Enforcement: Resolving — corrective action underway
TIER 3Unresolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2025Rule: Ground Water RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
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 30, 2024Rule: Stage 2 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 HERRIN
Is HERRIN water safe to drink?
HERRIN water receives a grade of A (84/100), which is considered excellent. Out of 69 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has HERRIN detected?
69 contaminants were tested in HERRIN's water. Notable contaminants include Lead (90th percentile), chlorate. 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does HERRIN have any EPA violations?
Yes, HERRIN has 5 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, Other, MR.
How many people does HERRIN serve?
HERRIN serves approximately 12,747 people, Illinois. The system provides water to 1 community: Herrin.
What type of water does HERRIN provide?
HERRIN sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is IL1990400.
How does HERRIN compare to other utilities in Illinois?
HERRIN scores 84/100 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.