A88/100
Chanhassen — Water Quality Report 2026
Serving 24,951 people · Minnesota
Water Source
Groundwater
County
—
System ID
MN1100001
Violations
1
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 2.00 mg/L | 1.30 mg/L | Over Limit |
chlorate | 329.00 µg/L | — | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 2, 2025 – December 2, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
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 Chanhassen
Is Chanhassen water safe to drink?
Chanhassen 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 Chanhassen detected?
67 contaminants were tested in Chanhassen's water. Notable contaminants include Copper (90th percentile), chlorate. 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does Chanhassen have any EPA violations?
Yes, Chanhassen has 1 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT.
How many people does Chanhassen serve?
Chanhassen serves approximately 24,951 people, Minnesota.
What type of water does Chanhassen provide?
Chanhassen sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MN1100001.
How does Chanhassen compare to other utilities in Minnesota?
Chanhassen 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.