A80/100
CUII - INDIANA WATER SERVICE — Water Quality Report 2026
Serving 4,200 people · Indiana
Water Source
Purchased Surface Water
County
—
System ID
IN5245057
Violations
9
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2018.
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 CUII - INDIANA WATER SERVICE
Is CUII - INDIANA WATER SERVICE water safe to drink?
CUII - INDIANA WATER SERVICE water receives a grade of A (80/100), which is considered excellent. Out of 51 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CUII - INDIANA WATER SERVICE detected?
51 contaminants were tested in CUII - INDIANA WATER SERVICE's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CUII - INDIANA WATER SERVICE have any EPA violations?
Yes, CUII - INDIANA WATER SERVICE has 9 EPA violation(s) on record, with the most recent in 2018. Violation types include MR, MCL. 2 are health-based violations.
How many people does CUII - INDIANA WATER SERVICE serve?
CUII - INDIANA WATER SERVICE serves approximately 4,200 people, Indiana. The system provides water to 1 community: Merrillville.
What type of water does CUII - INDIANA WATER SERVICE provide?
CUII - INDIANA WATER SERVICE 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 IN5245057.
How does CUII - INDIANA WATER SERVICE compare to other utilities in Indiana?
CUII - INDIANA WATER SERVICE scores 80/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Indiana state page for a full comparison of water systems.