F0/100
Oak Bluffs Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 24,000 residents · Massachusetts
What's In Oak Bluffs's Tap Water?
66
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
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
Water Utility Details
OAK BLUFFS WATER DISTRICT
Population Served
24,000
Water Source
Groundwater
System ID
MA4221000
Frequently Asked Questions About Oak Bluffs Water
Is Oak Bluffs tap water safe to drink?
Oak Bluffs, Massachusetts tap water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA maximum contaminant levels and 101 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Oak Bluffs's water?
Of the 66 contaminants tested in Oak Bluffs's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Oak Bluffs have any water quality violations?
Yes, Oak Bluffs has 101 EPA violation(s) on record, with the most recent in 2015. Violation types include Other, MR, MCL. 18 of these are health-based violations, which are the most serious category.
Do I need a water filter in Oak Bluffs?
Oak Bluffs water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.
Where does Oak Bluffs's tap water come from?
Oak Bluffs's drinking water is sourced from groundwater and supplied by OAK BLUFFS WATER DISTRICT. The system serves approximately 24,000 people. Groundwater is pumped from underground aquifers, which often provides natural filtration.
How often is Oak Bluffs's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Oak Bluffs's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Oak Bluffs's water compare to other cities in Massachusetts?
Oak Bluffs's water quality score of 0/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our Massachusetts state page to see how all cities in the state compare.
What should I do if I'm concerned about Oak Bluffs's water quality?
If you have concerns about Oak Bluffs's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (OAK BLUFFS WATER DISTRICT) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.