C41/100
GROTON WATER DEPARTMENT — Water Quality Report 2026
Serving 5,456 people · Massachusetts
Water Source
Groundwater
County
—
System ID
MA2115000
Violations
48
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 2.50 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.005 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2013.
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 GROTON WATER DEPARTMENT
Is GROTON WATER DEPARTMENT water safe to drink?
GROTON WATER DEPARTMENT water receives a grade of C (41/100), which is considered fair. 1 contaminant(s) exceed EPA legal limits and 48 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has GROTON WATER DEPARTMENT detected?
32 contaminants were tested in GROTON WATER DEPARTMENT's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does GROTON WATER DEPARTMENT have any EPA violations?
Yes, GROTON WATER DEPARTMENT has 48 EPA violation(s) on record, with the most recent in 2013. Violation types include MR, Other.
How many people does GROTON WATER DEPARTMENT serve?
GROTON WATER DEPARTMENT serves approximately 5,456 people, Massachusetts. The system provides water to 1 community: Groton.
What type of water does GROTON WATER DEPARTMENT provide?
GROTON WATER DEPARTMENT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MA2115000.
How does GROTON WATER DEPARTMENT compare to other utilities in Massachusetts?
GROTON WATER DEPARTMENT scores 41/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Massachusetts state page for a full comparison of water systems.