C52/100
HOPKINTON WATER DEPARTMENT — Water Quality Report 2026
Serving 12,586 people · Massachusetts
Water Source
Groundwater
County
—
System ID
MA2139000
Violations
9
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 5.87 mg/L | 1.30 mg/L | Over Limit |
PFOA | 0.007 µg/L | 0.004 µg/L | Over Limit |
Lead (90th percentile) | 0.007 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2014.
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 HOPKINTON WATER DEPARTMENT
Is HOPKINTON WATER DEPARTMENT water safe to drink?
HOPKINTON WATER DEPARTMENT water receives a grade of C (52/100), which is considered fair. 2 contaminant(s) exceed EPA legal limits and 9 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has HOPKINTON WATER DEPARTMENT detected?
32 contaminants were tested in HOPKINTON WATER DEPARTMENT's water. Notable contaminants include Copper (90th percentile), PFOA, Lead (90th percentile). 2 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).
Does HOPKINTON WATER DEPARTMENT have any EPA violations?
Yes, HOPKINTON WATER DEPARTMENT has 9 EPA violation(s) on record, with the most recent in 2014. Violation types include MR, MCL. 5 are health-based violations.
How many people does HOPKINTON WATER DEPARTMENT serve?
HOPKINTON WATER DEPARTMENT serves approximately 12,586 people, Massachusetts. The system provides water to 1 community: Hopkinton.
What type of water does HOPKINTON WATER DEPARTMENT provide?
HOPKINTON WATER DEPARTMENT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MA2139000.
How does HOPKINTON WATER DEPARTMENT compare to other utilities in Massachusetts?
HOPKINTON WATER DEPARTMENT scores 52/100 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.