A87/100
OLNEY — Water Quality Report 2026
Serving 8,877 people · Illinois
Water Source
Surface Water
County
—
System ID
IL1590200
Violations
5
Contaminant Test Results
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
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: April 1, 2024 – June 30, 2024Rule: Stage 2 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: April 1, 2023 – June 30, 2023Rule: 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 OLNEY
Is OLNEY water safe to drink?
OLNEY water receives a grade of A (87/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has OLNEY detected?
31 contaminants were tested in OLNEY's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does OLNEY have any EPA violations?
Yes, OLNEY has 5 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, TT, MCL. 2 are health-based violations.
How many people does OLNEY serve?
OLNEY serves approximately 8,877 people, Illinois. The system provides water to 1 community: Olney.
What type of water does OLNEY provide?
OLNEY 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 IL1590200.
How does OLNEY compare to other utilities in Illinois?
OLNEY scores 87/100 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.