B60/100
WATERLOO WATER WORKS — Water Quality Report 2026
Serving 69,504 people · Iowa
Water Source
Groundwater
County
—
System ID
IA0790074
Violations
22
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 670.92 µg/L | — | Above Goal |
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 2015.
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 WATERLOO WATER WORKS
Is WATERLOO WATER WORKS water safe to drink?
WATERLOO WATER WORKS water receives a grade of B (60/100), which is considered good. Out of 66 contaminants tested, none exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has WATERLOO WATER WORKS detected?
66 contaminants were tested in WATERLOO WATER WORKS's water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does WATERLOO WATER WORKS have any EPA violations?
Yes, WATERLOO WATER WORKS has 22 EPA violation(s) on record, with the most recent in 2015. Violation types include MCL, MR. 3 are health-based violations.
How many people does WATERLOO WATER WORKS serve?
WATERLOO WATER WORKS serves approximately 69,504 people, Iowa. The system provides water to 1 community: Waterloo.
What type of water does WATERLOO WATER WORKS provide?
WATERLOO WATER WORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IA0790074.
How does WATERLOO WATER WORKS compare to other utilities in Iowa?
WATERLOO WATER WORKS scores 60/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Iowa state page for a full comparison of water systems.