B69/100
MARENGO WATER SUPPLY — Water Quality Report 2026
Serving 2,435 people · Iowa
Water Source
Groundwater
County
—
System ID
IA4843033
Violations
20
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 2019.
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 MARENGO WATER SUPPLY
Is MARENGO WATER SUPPLY water safe to drink?
MARENGO WATER SUPPLY water receives a grade of B (69/100), which is considered good. Out of 1 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has MARENGO WATER SUPPLY detected?
1 contaminants were tested in MARENGO WATER SUPPLY's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does MARENGO WATER SUPPLY have any EPA violations?
Yes, MARENGO WATER SUPPLY has 20 EPA violation(s) on record, with the most recent in 2019. Violation types include MR, Other, MCL. 2 are health-based violations.
How many people does MARENGO WATER SUPPLY serve?
MARENGO WATER SUPPLY serves approximately 2,435 people, Iowa. The system provides water to 1 community: Marengo.
What type of water does MARENGO WATER SUPPLY provide?
MARENGO WATER SUPPLY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IA4843033.
How does MARENGO WATER SUPPLY compare to other utilities in Iowa?
MARENGO WATER SUPPLY scores 69/100 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.