Public water system · MA1341000
ActiveWilliamstown Water Dept
At a glance
Williamstown Water Dept (PWSID MA1341000) is an active community water system in Berkshire County, Massachusetts. It reports serving 7,326 people through 2,119 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 6 violations for this system; none is health-based, and the most recent began in June 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
7,326
Service connections
2,119
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Williamstown Water Dept compare with other water systems in Berkshire County?
By EPA's size categories, Williamstown Water Dept is a medium system (3,301 to 10,000 people). Berkshire County has 183 active public water systems, and Williamstown Water Dept is the 5th-largest of them by population served. Its population served is about 10 times the county average of 730 people per system, and accounts for 5.5% of the 133,497 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 Williamstown Water Dept 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 Williamstown Water Dept?
EPA lists Williamstown Water Dept 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. 33 of the 183 active systems in Berkshire County (18%) are also owned by a local government.
Does Williamstown Water Dept have drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in June 2015. The violations listed here began between November 1981 and June 2015. By type: 3 monitoring and reporting and 3 public notice, recordkeeping or other. The contaminant or rule involved most often is Lead and Copper Rule (2 of them). EPA lists 4 as archived and 2 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 |
|---|---|---|---|---|
| 2015-06-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Addressed |
| 2015-06-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Addressed |
| 1995-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 1982-03-31 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1981-12-31 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1981-11-30 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
All 6 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.
Williamstown Water Dept: frequently asked questions
Who runs Williamstown Water Dept?
Williamstown Water Dept (PWSID MA1341000) is a community water system owned by a local government. It is regulated by the MA state drinking water program.
How many people does Williamstown Water Dept serve?
Williamstown Water Dept reports serving 7,326 people through 2,119 service connections in Berkshire County, Massachusetts.
Where does Williamstown Water Dept 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 Williamstown Water Dept have any drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in June 2015. 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 Williamstown Water Dept'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 6 violations for this system; none is health-based, and the most recent began in June 2015. For current results, consult the system's annual water quality report, EPA ECHO, or the MA state drinking water program.
Where can I find Williamstown Water Dept's water quality report?
As a community water system, Williamstown Water Dept 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 Berkshire County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Pittsfield Dpu Water Dept | Berkshire | 43,927 | Community | Surface water |
| North Adams Water Dept | Berkshire | 13,000 | Community | Surface water |
| Lenox Dpw Water Division | Berkshire | 9,800 | Community | Surface water |
| Adams Fire District | Berkshire | 7,945 | Community | Groundwater |
| Dalton Fire District | Berkshire | 6,330 | Community | Purchased surface water |
| Lee Water Dept | Berkshire | 5,686 | Community | Surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Williamstown Water Dept, PWSID MA1341000, Massachusetts”, https://aquacensus.com/water-systems/massachusetts/williamstown-water-dept-ma1341000 (data as of October 1, 2026).