C51/100
PLYMOUTH UTILITIES — Water Quality Report 2026
Serving 8,964 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI4600446
Violations
30
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 2.75 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.006 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 1, 2024 – June 30, 2024Enforcement: 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 PLYMOUTH UTILITIES
Is PLYMOUTH UTILITIES water safe to drink?
PLYMOUTH UTILITIES water receives a grade of C (51/100), which is considered fair. 1 contaminant(s) exceed EPA legal limits and 30 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has PLYMOUTH UTILITIES detected?
39 contaminants were tested in PLYMOUTH UTILITIES's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does PLYMOUTH UTILITIES have any EPA violations?
Yes, PLYMOUTH UTILITIES has 30 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, TT. 2 are health-based violations.
How many people does PLYMOUTH UTILITIES serve?
PLYMOUTH UTILITIES serves approximately 8,964 people, Wisconsin. The system provides water to 1 community: Plymouth.
What type of water does PLYMOUTH UTILITIES provide?
PLYMOUTH UTILITIES sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI4600446.
How does PLYMOUTH UTILITIES compare to other utilities in Wisconsin?
PLYMOUTH UTILITIES scores 51/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Wisconsin state page for a full comparison of water systems.