A80/100
Big Lake — Water Quality Report 2026
Serving 12,413 people · Minnesota
Water Source
Groundwater
County
—
System ID
MN1710002
Violations
5
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.60 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 2009.
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 Big Lake
Is Big Lake water safe to drink?
Big Lake water receives a grade of A (80/100), which is considered excellent. Out of 59 contaminants tested, 1 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has Big Lake detected?
59 contaminants were tested in Big Lake's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does Big Lake have any EPA violations?
Yes, Big Lake has 5 EPA violation(s) on record, with the most recent in 2009. Violation types include MR, MCL. 1 are health-based violations.
How many people does Big Lake serve?
Big Lake serves approximately 12,413 people, Minnesota.
What type of water does Big Lake provide?
Big Lake sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MN1710002.
How does Big Lake compare to other utilities in Minnesota?
Big Lake scores 80/100 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.