A86/100
Madison Lake — Water Quality Report 2026
Serving 1,017 people · Minnesota
Water Source
Groundwater
County
—
System ID
MN1070007
Violations
6
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.49 mg/L | 1.30 mg/L | Over Limit |
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 Madison Lake
Is Madison Lake water safe to drink?
Madison Lake water receives a grade of A (86/100), which is considered excellent. Out of 2 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has Madison Lake detected?
2 contaminants were tested in Madison Lake's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does Madison Lake have any EPA violations?
Yes, Madison Lake has 6 EPA violation(s) on record, with the most recent in 2020. Violation types include MR, MON.
How many people does Madison Lake serve?
Madison Lake serves approximately 1,017 people, Minnesota.
What type of water does Madison Lake provide?
Madison Lake sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MN1070007.
How does Madison Lake compare to other utilities in Minnesota?
Madison Lake scores 86/100 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.