D25/100
MIDDLEBOROUGH WATER SUPPLY — Water Quality Report 2026
Serving 15,350 people · Massachusetts
Water Source
Groundwater
County
—
System ID
MA4182000
Violations
18
Contaminant Test Results
6 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.35 mg/L | 1.30 mg/L | Over Limit |
PFOA | 0.011 µg/L | 0.004 µg/L | Over Limit |
PFOS | 0.005 µg/L | 0.004 µg/L | Over Limit |
chlorate | 650.00 µg/L | — | Above Goal |
manganese | 337.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2012.
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 MIDDLEBOROUGH WATER SUPPLY
Is MIDDLEBOROUGH WATER SUPPLY water safe to drink?
MIDDLEBOROUGH WATER SUPPLY water receives a grade of D (25/100), which is considered poor. 3 contaminant(s) exceed EPA legal limits and 18 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has MIDDLEBOROUGH WATER SUPPLY detected?
67 contaminants were tested in MIDDLEBOROUGH WATER SUPPLY's water. Notable contaminants include PFOA, PFOS, Copper (90th percentile), Lead (90th percentile), chlorate. 3 exceed EPA legal limits (MCLs). 6 exceed EPA health goals (MCLGs).
Does MIDDLEBOROUGH WATER SUPPLY have any EPA violations?
Yes, MIDDLEBOROUGH WATER SUPPLY has 18 EPA violation(s) on record, with the most recent in 2012. Violation types include Other, MR, MCL. 6 are health-based violations.
How many people does MIDDLEBOROUGH WATER SUPPLY serve?
MIDDLEBOROUGH WATER SUPPLY serves approximately 15,350 people, Massachusetts. The system provides water to 1 community: Middleborough.
What type of water does MIDDLEBOROUGH WATER SUPPLY provide?
MIDDLEBOROUGH WATER SUPPLY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MA4182000.
How does MIDDLEBOROUGH WATER SUPPLY compare to other utilities in Massachusetts?
MIDDLEBOROUGH WATER SUPPLY scores 25/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Massachusetts state page for a full comparison of water systems.