Public water system · NY2902820
ActiveEast Williston (V)
At a glance
East Williston (V) (PWSID NY2902820) is an active community water system in Nassau County, New York. It reports serving 2,556 people through 874 service connections. Its primary water source is purchased groundwater, 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 January 2005.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,556
Service connections
874
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does East Williston (V) compare with other water systems in Nassau County?
By EPA's size categories, East Williston (V) is a small system (501 to 3,300 people). Nassau County has 44 active public water systems. Its population served is well below the county average of 31,534 people per system, and accounts for 0.2% of the 1,387,479 people reported by systems filed under the county. Across New York, the 8,167 active systems average 2,374 people each. Nationally, the average active community water system reports serving 6,703 people, so East Williston (V) is about 62% below 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. New York has 2,281 active community water systems, 28% of the state's 8,167 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 114 New York systems (1.4%) list purchased groundwater as their primary source.
Who owns and regulates East Williston (V)?
EPA lists East Williston (V) as owned by a local government. The NY state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 21 of the 44 active systems in Nassau County (48%) are also owned by a local government.
Does East Williston (V) have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in January 2005. The violations listed here began between October 1999 and January 2005. By type: 1 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminants or rules involved are Lead and Copper Rule and Consumer Confidence Rule. EPA lists 2 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2005-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1999-10-19 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
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.
East Williston (V): frequently asked questions
Who runs East Williston (V)?
East Williston (V) (PWSID NY2902820) is a community water system owned by a local government. It is regulated by the NY state drinking water program.
How many people does East Williston (V) serve?
East Williston (V) reports serving 2,556 people through 874 service connections in Nassau County, New York.
Where does East Williston (V) get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does East Williston (V) have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in January 2005. 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 East Williston (V)'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 January 2005. For current results, consult the system's annual water quality report, EPA ECHO, or the NY state drinking water program.
Where can I find East Williston (V)'s water quality report?
As a community water system, East Williston (V) 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 Nassau County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Liberty Utilities New York - Lynbrook | Nassau | 220,000 | Community | Groundwater |
| Liberty Utilities New York - Merrick | Nassau | 135,000 | Community | Groundwater |
| Wa of Western Nassau | Nassau | 120,000 | Community | Groundwater |
| Town of Hempstead Water Department | Nassau | 110,000 | Community | Groundwater |
| Jericho Wd | Nassau | 58,000 | Community | Groundwater |
| Hempstead (V) | Nassau | 56,000 | Community | Groundwater |
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, “East Williston (V), PWSID NY2902820, New York”, https://aquacensus.com/water-systems/new-york/east-williston-v-ny2902820 (data as of October 1, 2026).