A82/100
MERRIONETTE PARK — Water Quality Report 2026
Serving 1,969 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL0311890
Violations
18
Contaminant Test Results
EPA Violation History
4
Violations (last 5yr)
3
Unresolved
0
Health-Related
TIER 3Unresolved
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.
TIER 3Unresolved
Surface water treatment technique failure
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2023 – July 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 MERRIONETTE PARK
Is MERRIONETTE PARK water safe to drink?
MERRIONETTE PARK water receives a grade of A (82/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has MERRIONETTE PARK detected?
1 contaminants were tested in MERRIONETTE PARK's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does MERRIONETTE PARK have any EPA violations?
Yes, MERRIONETTE PARK has 18 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR.
How many people does MERRIONETTE PARK serve?
MERRIONETTE PARK serves approximately 1,969 people, Illinois. The system provides water to 1 community: Merrionette Park.
What type of water does MERRIONETTE PARK provide?
MERRIONETTE PARK 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 IL0311890.
How does MERRIONETTE PARK compare to other utilities in Illinois?
MERRIONETTE PARK scores 82/100 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.