A96/100
Mankato — Water Quality Report 2026
Serving 42,803 people · Minnesota
Water Source
Groundwater Under Influence of Surface Water
County
—
System ID
MN1070009
Violations
1
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 Mankato
Is Mankato water safe to drink?
Mankato water receives a grade of A (96/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has Mankato detected?
69 contaminants were tested in Mankato's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does Mankato have any EPA violations?
Yes, Mankato has 1 EPA violation(s) on record, with the most recent in 1994. Violation types include MR.
How many people does Mankato serve?
Mankato serves approximately 42,803 people, Minnesota.
What type of water does Mankato provide?
Mankato sources its water from groundwater under influence of surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is MN1070009.
How does Mankato compare to other utilities in Minnesota?
Mankato scores 96/100 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.