Public water system · MA4296016
ActiveWest Tisbury Free Public Library
At a glance
West Tisbury Free Public Library (PWSID MA4296016) is an active transient non-community water system in Dukes County, Massachusetts. It reports serving 25 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is not health-based, and the most recent began in October 2016.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
2
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does West Tisbury Free Public Library compare with other water systems in Dukes County?
By EPA's size categories, West Tisbury Free Public Library is a very small system (500 people or fewer). Dukes County has 25 active public water systems. Its population served is well below the county average of 1,687 people per system, and accounts for less than 0.1% of the 42,176 people reported by systems filed under the county. Across Massachusetts, the 1,636 active systems average 6,275 people each. Nationally, the average active transient non-community water system reports serving 144 people, so West Tisbury Free Public Library is well below that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Massachusetts has 859 active transient non-community water systems, 53% of the state's 1,636 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,354 Massachusetts systems (83%) list groundwater as their primary source.
Who owns and regulates West Tisbury Free Public Library?
EPA lists West Tisbury Free Public Library as owned by a local government. The MA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 10 of the 25 active systems in Dukes County (40%) are also owned by a local government.
Does West Tisbury Free Public Library have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in October 2016. By type: 1 monitoring and reporting. The contaminant or rule involved is Nitrate. EPA lists 1 as archived. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2016-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
The one violation in EPA's records.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
West Tisbury Free Public Library: frequently asked questions
Who runs West Tisbury Free Public Library?
West Tisbury Free Public Library (PWSID MA4296016) is a transient non-community water system owned by a local government. It is regulated by the MA state drinking water program.
How many people does West Tisbury Free Public Library serve?
West Tisbury Free Public Library reports serving 25 people through 2 service connections in Dukes County, Massachusetts.
Where does West Tisbury Free Public Library get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does West Tisbury Free Public Library have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in October 2016. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is West Tisbury Free Public Library's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list one violation for this system; it is not health-based, and the most recent began in October 2016. For current results, consult EPA ECHO, or the MA state drinking water program.
Where can I find West Tisbury Free Public Library's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. West Tisbury Free Public Library is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Dukes County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Oak Bluffs Water District | Dukes | 24,000 | Community | Groundwater |
| Edgartown Water Department | Dukes | 8,027 | Community | Groundwater |
| Tisbury Water Works | Dukes | 6,082 | Community | Groundwater |
| Menemsha Water Company | Dukes | 841 | Community | Groundwater |
| Marthas Vineyard Airport | Dukes | 750 | Non-transient non-community | Purchased groundwater |
| Gosnold Water Dept | Dukes | 425 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “West Tisbury Free Public Library, PWSID MA4296016, Massachusetts”, https://aquacensus.com/water-systems/massachusetts/west-tisbury-free-public-library-ma4296016 (data as of October 1, 2026).