Public water system · MA4296000
ActiveTisbury Water Works
At a glance
Tisbury Water Works (PWSID MA4296000) is an active community water system in Dukes County, Massachusetts. It reports serving 6,082 people through 2,846 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
6,082
Service connections
2,846
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Tisbury Water Works compare with other water systems in Dukes County?
By EPA's size categories, Tisbury Water Works is a medium system (3,301 to 10,000 people). Dukes County has 25 active public water systems, and Tisbury Water Works is the 3rd-largest of them by population served. Its population served is about 3.6 times the county average of 1,687 people per system, and accounts for 14% 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 community water system reports serving 6,703 people, so Tisbury Water Works is roughly in line with that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Massachusetts has 531 active community water systems, 32% 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 Tisbury Water Works?
EPA lists Tisbury Water Works 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 Tisbury Water Works have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2022. The violations listed here began between April 2022 and July 2022. By type: 11 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminants or rules involved are Consumer Confidence Rule, Cyanide, Beryllium and Chromium. EPA lists 11 as archived and 1 as addressed. 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. Addressed means the violation is not resolved or archived and is covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2022-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Addressed |
| 2022-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cyanidecode 1024 | No | Archived |
| 2022-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Berylliumcode 1075 | No | Archived |
| 2022-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chromiumcode 1020 | No | Archived |
| 2022-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Bariumcode 1010 | No | Archived |
| 2022-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Thalliumcode 1085 | No | Archived |
| 2022-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Archived |
| 2022-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cadmiumcode 1015 | No | Archived |
| 2022-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Archived |
| 2022-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Antimonycode 1074 | No | Archived |
| 2022-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nickelcode 1036 | No | Archived |
| 2022-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Asbestoscode 1094 | No | Archived |
The 12 most recent violations in EPA's records, newest first.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.
Tisbury Water Works: frequently asked questions
Who runs Tisbury Water Works?
Tisbury Water Works (PWSID MA4296000) is a community water system owned by a local government. It is regulated by the MA state drinking water program.
How many people does Tisbury Water Works serve?
Tisbury Water Works reports serving 6,082 people through 2,846 service connections in Dukes County, Massachusetts.
Where does Tisbury Water Works 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 Tisbury Water Works have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2022. 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 Tisbury Water Works' 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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 2022. For current results, consult the system's annual water quality report, EPA ECHO, or the MA state drinking water program.
Where can I find Tisbury Water Works' water quality report?
As a community water system, Tisbury Water Works must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
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 |
| 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 |
| West Tisbury Elementary School | Dukes | 375 | Non-transient non-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, “Tisbury Water Works, PWSID MA4296000, Massachusetts”, https://aquacensus.com/water-systems/massachusetts/tisbury-water-works-ma4296000 (data as of October 1, 2026).