F0/100
WRENTHAM WATER DIVISION — Water Quality Report 2026
Serving 11,795 people · Massachusetts
Water Source
Groundwater
County
—
System ID
MA4350000
Violations
90
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 2.10 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 2015.
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 WRENTHAM WATER DIVISION
Is WRENTHAM WATER DIVISION water safe to drink?
WRENTHAM WATER DIVISION water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 90 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has WRENTHAM WATER DIVISION detected?
49 contaminants were tested in WRENTHAM WATER DIVISION's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does WRENTHAM WATER DIVISION have any EPA violations?
Yes, WRENTHAM WATER DIVISION has 90 EPA violation(s) on record, with the most recent in 2015. Violation types include MR, Other, MCL. 27 are health-based violations.
How many people does WRENTHAM WATER DIVISION serve?
WRENTHAM WATER DIVISION serves approximately 11,795 people, Massachusetts. The system provides water to 1 community: Wrentham.
What type of water does WRENTHAM WATER DIVISION provide?
WRENTHAM WATER DIVISION sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MA4350000.
How does WRENTHAM WATER DIVISION compare to other utilities in Massachusetts?
WRENTHAM WATER DIVISION scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Massachusetts state page for a full comparison of water systems.