Public water system · VT0005098
ActiveWilliston Water Dept
At a glance
Williston Water Dept (PWSID VT0005098) is an active community water system in Chittenden County, Vermont. It reports serving 7,259 people through 3,226 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; none is health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
7,259
Service connections
3,226
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Williston Water Dept compare with other water systems in Chittenden County?
By EPA's size categories, Williston Water Dept is a medium system (3,301 to 10,000 people). Chittenden County has 96 active public water systems. Its population served is about 4.6 times the county average of 1,566 people per system, and accounts for 4.8% of the 150,374 people reported by systems filed under the county. Across Vermont, the 1,357 active systems average 477 people each. Nationally, the average active community water system reports serving 6,703 people, so Williston 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. Vermont has 405 active community water systems, 30% of the state's 1,357 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 50 Vermont systems (3.7%) list purchased surface water as their primary source.
Who owns and regulates Williston Water Dept?
EPA lists Williston Water Dept as owned by a local government. The VT state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 32 of the 96 active systems in Chittenden County (33%) are also owned by a local government.
Does Williston Water Dept have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in July 2025. The violations listed here began between July 2025 and July 2025. By type: 2 monitoring and reporting. The contaminants or rules involved are Haloacetic acids (HAA5) and Total trihalomethanes (TTHM). EPA lists 2 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 |
|---|---|---|---|---|
| 2025-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
| 2025-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
All 2 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.
Williston Water Dept: frequently asked questions
Who runs Williston Water Dept?
Williston Water Dept (PWSID VT0005098) is a community water system owned by a local government. It is regulated by the VT state drinking water program.
How many people does Williston Water Dept serve?
Williston Water Dept reports serving 7,259 people through 3,226 service connections in Chittenden County, Vermont.
Where does Williston Water Dept get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Williston Water Dept have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in July 2025. 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 Williston 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 2 violations for this system; none is health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the VT state drinking water program.
Where can I find Williston Water Dept's water quality report?
As a community water system, Williston 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 Chittenden County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Burlington Dept Public Works Water Div | Chittenden | 42,000 | Community | Surface water |
| South Burlington City Water System | Chittenden | 19,500 | Community | Purchased surface water |
| Colchester Water System | Chittenden | 11,299 | Community | Purchased surface water |
| Essex Town Water System | Chittenden | 9,734 | Community | Purchased surface water |
| Essex Jct Water Dept | Chittenden | 9,500 | Community | Purchased surface water |
| Winooski Water Dept | Chittenden | 8,500 | Community | Purchased surface water |
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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, “Williston Water Dept, PWSID VT0005098, Vermont”, https://aquacensus.com/water-systems/vermont/williston-water-dept-vt0005098 (data as of October 1, 2026).