B78/100
INDIANA AMERICAN WATER - NORTHWEST — Water Quality Report 2026
Serving 210,510 people · Indiana
Water Source
Surface Water
County
—
System ID
IN5245015
Violations
11
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 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 INDIANA AMERICAN WATER - NORTHWEST
Is INDIANA AMERICAN WATER - NORTHWEST water safe to drink?
INDIANA AMERICAN WATER - NORTHWEST water receives a grade of B (78/100), which is considered good. Out of 76 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has INDIANA AMERICAN WATER - NORTHWEST detected?
76 contaminants were tested in INDIANA AMERICAN WATER - NORTHWEST's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does INDIANA AMERICAN WATER - NORTHWEST have any EPA violations?
Yes, INDIANA AMERICAN WATER - NORTHWEST has 11 EPA violation(s) on record, with the most recent in 2013. Violation types include TT, MR. 2 are health-based violations.
How many people does INDIANA AMERICAN WATER - NORTHWEST serve?
INDIANA AMERICAN WATER - NORTHWEST serves approximately 210,510 people, Indiana. The system provides water to 2 communities: Gary, Merrillville.
What type of water does INDIANA AMERICAN WATER - NORTHWEST provide?
INDIANA AMERICAN WATER - NORTHWEST 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 IN5245015.
How does INDIANA AMERICAN WATER - NORTHWEST compare to other utilities in Indiana?
INDIANA AMERICAN WATER - NORTHWEST scores 78/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Indiana state page for a full comparison of water systems.