A85/100
Plymouth — Water Quality Report 2026
Serving 81,026 people · Minnesota
Water Source
Groundwater
County
—
System ID
MN1270044
Violations
1
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.70 mg/L | 1.30 mg/L | Over Limit |
chlorate | 226.00 µg/L | — | Above Goal |
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 1991.
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 Plymouth
Is Plymouth water safe to drink?
Plymouth water receives a grade of A (85/100), which is considered excellent. Out of 74 contaminants tested, 1 exceed EPA legal limits. 3 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has Plymouth detected?
74 contaminants were tested in Plymouth's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile), chlorate. 1 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).
Does Plymouth have any EPA violations?
Yes, Plymouth has 1 EPA violation(s) on record, with the most recent in 1991. Violation types include MR.
How many people does Plymouth serve?
Plymouth serves approximately 81,026 people, Minnesota.
What type of water does Plymouth provide?
Plymouth sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MN1270044.
How does Plymouth compare to other utilities in Minnesota?
Plymouth scores 85/100 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.