A94/100
MARSHALLTOWN WATER WORKS — Water Quality Report 2026
Serving 27,591 people · Iowa
Water Source
Groundwater
County
—
System ID
IA6469042
Violations
3
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 1994.
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 MARSHALLTOWN WATER WORKS
Is MARSHALLTOWN WATER WORKS water safe to drink?
MARSHALLTOWN WATER WORKS water receives a grade of A (94/100), which is considered excellent. Out of 66 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has MARSHALLTOWN WATER WORKS detected?
66 contaminants were tested in MARSHALLTOWN WATER WORKS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does MARSHALLTOWN WATER WORKS have any EPA violations?
Yes, MARSHALLTOWN WATER WORKS has 3 EPA violation(s) on record, with the most recent in 1994. Violation types include MR.
How many people does MARSHALLTOWN WATER WORKS serve?
MARSHALLTOWN WATER WORKS serves approximately 27,591 people, Iowa. The system provides water to 1 community: Marshalltown.
What type of water does MARSHALLTOWN WATER WORKS provide?
MARSHALLTOWN WATER WORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IA6469042.
How does MARSHALLTOWN WATER WORKS compare to other utilities in Iowa?
MARSHALLTOWN WATER WORKS scores 94/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Iowa state page for a full comparison of water systems.