A93/100
Chaska — Water Quality Report 2026
Serving 30,000 people · Minnesota
Water Source
Groundwater
County
—
System ID
MN1100002
Violations
1
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
manganese | 602.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.006 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2001.
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 Chaska
Is Chaska water safe to drink?
Chaska water receives a grade of A (93/100), which is considered excellent. Out of 66 contaminants tested, none exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has Chaska detected?
66 contaminants were tested in Chaska's water. Notable contaminants include Lead (90th percentile), manganese. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does Chaska have any EPA violations?
Yes, Chaska has 1 EPA violation(s) on record, with the most recent in 2001. Violation types include MR.
How many people does Chaska serve?
Chaska serves approximately 30,000 people, Minnesota.
What type of water does Chaska provide?
Chaska sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MN1100002.
How does Chaska compare to other utilities in Minnesota?
Chaska scores 93/100 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.