A88/100
Willmar — Water Quality Report 2026
Serving 21,045 people · Minnesota
Water Source
Groundwater
County
—
System ID
MN1340016
Violations
1
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.81 mg/L | 1.30 mg/L | Over Limit |
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 2020.
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 Willmar
Is Willmar water safe to drink?
Willmar water receives a grade of A (88/100), which is considered excellent. Out of 67 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has Willmar detected?
67 contaminants were tested in Willmar's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does Willmar have any EPA violations?
Yes, Willmar has 1 EPA violation(s) on record, with the most recent in 2020. Violation types include MR.
How many people does Willmar serve?
Willmar serves approximately 21,045 people, Minnesota.
What type of water does Willmar provide?
Willmar sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MN1340016.
How does Willmar compare to other utilities in Minnesota?
Willmar scores 88/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Minnesota state page for a full comparison of water systems.