F0/100
OAK BLUFFS WATER DISTRICT — Water Quality Report 2026
Serving 24,000 people · Massachusetts
Water Source
Groundwater
County
—
System ID
MA4221000
Violations
101
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.004 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 OAK BLUFFS WATER DISTRICT
Is OAK BLUFFS WATER DISTRICT water safe to drink?
OAK BLUFFS WATER DISTRICT water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 101 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has OAK BLUFFS WATER DISTRICT detected?
66 contaminants were tested in OAK BLUFFS WATER DISTRICT's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does OAK BLUFFS WATER DISTRICT have any EPA violations?
Yes, OAK BLUFFS WATER DISTRICT has 101 EPA violation(s) on record, with the most recent in 2015. Violation types include Other, MR, MCL. 18 are health-based violations.
How many people does OAK BLUFFS WATER DISTRICT serve?
OAK BLUFFS WATER DISTRICT serves approximately 24,000 people, Massachusetts. The system provides water to 1 community: Oak Bluffs.
What type of water does OAK BLUFFS WATER DISTRICT provide?
OAK BLUFFS WATER DISTRICT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is MA4221000.
How does OAK BLUFFS WATER DISTRICT compare to other utilities in Massachusetts?
OAK BLUFFS WATER DISTRICT 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.