D37/100
OTTER LAKE WATER COMMISSION — Water Quality Report 2026
Serving 1,318 people · Illinois
Water Source
Surface Water
County
—
System ID
IL1175200
Violations
16
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2013.
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 OTTER LAKE WATER COMMISSION
Is OTTER LAKE WATER COMMISSION water safe to drink?
OTTER LAKE WATER COMMISSION water receives a grade of D (37/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 16 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has OTTER LAKE WATER COMMISSION detected?
1 contaminants were tested in OTTER LAKE WATER COMMISSION's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does OTTER LAKE WATER COMMISSION have any EPA violations?
Yes, OTTER LAKE WATER COMMISSION has 16 EPA violation(s) on record, with the most recent in 2013. Violation types include MR, TT, MCL. 11 are health-based violations.
How many people does OTTER LAKE WATER COMMISSION serve?
OTTER LAKE WATER COMMISSION serves approximately 1,318 people, Illinois.
What type of water does OTTER LAKE WATER COMMISSION provide?
OTTER LAKE WATER COMMISSION 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 IL1175200.
How does OTTER LAKE WATER COMMISSION compare to other utilities in Illinois?
OTTER LAKE WATER COMMISSION scores 37/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Illinois state page for a full comparison of water systems.