A89/100
SULLIVAN — Water Quality Report 2026
Serving 4,729 people · Illinois
Water Source
Groundwater
County
—
System ID
IL1390300
Violations
7
Contaminant Test Results
EPA Violation History
3
Violations (last 5yr)
1
Unresolved
0
Health-Related
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 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, 2024 – October 30, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2023 – October 30, 2024Rule: Ground Water RuleEnforcement: 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 SULLIVAN
Is SULLIVAN water safe to drink?
SULLIVAN water receives a grade of A (89/100), which is considered excellent. Out of 51 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has SULLIVAN detected?
51 contaminants were tested in SULLIVAN's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does SULLIVAN have any EPA violations?
Yes, SULLIVAN has 7 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, Other, MCL. 1 are health-based violations.
How many people does SULLIVAN serve?
SULLIVAN serves approximately 4,729 people, Illinois. The system provides water to 1 community: Sullivan.
What type of water does SULLIVAN provide?
SULLIVAN sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL1390300.
How does SULLIVAN compare to other utilities in Illinois?
SULLIVAN scores 89/100 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.