A90/100
RIVER FOREST — Water Quality Report 2026
Serving 11,717 people · Illinois
Water Source
Purchased Surface Water
County
—
System ID
IL0312610
Violations
6
Contaminant Test Results
EPA Violation History
2
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 3Unresolved
Surface water treatment technique failure
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 RIVER FOREST
Is RIVER FOREST water safe to drink?
RIVER FOREST water receives a grade of A (90/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA legal limits. The water meets federal safety standards.
What contaminants has RIVER FOREST detected?
69 contaminants were tested in RIVER FOREST's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does RIVER FOREST have any EPA violations?
Yes, RIVER FOREST has 6 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, Other, MR. 1 are health-based violations.
How many people does RIVER FOREST serve?
RIVER FOREST serves approximately 11,717 people, Illinois. The system provides water to 1 community: River Forest.
What type of water does RIVER FOREST provide?
RIVER FOREST 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 IL0312610.
How does RIVER FOREST compare to other utilities in Illinois?
RIVER FOREST scores 90/100 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.