Public water system · NY2902858
ActiveWilliston Park (V)
At a glance
Williston Park (V) (PWSID NY2902858) is an active community water system in Nassau County, New York. It reports serving 7,287 people through 2,432 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in October 2013.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
7,287
Service connections
2,432
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Williston Park (V) compare with other water systems in Nassau County?
By EPA's size categories, Williston Park (V) is a medium system (3,301 to 10,000 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 0.5% 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 Williston Park (V) 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. New York has 2,281 active community water systems, 28% of the state's 8,167 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 7,096 New York systems (87%) list groundwater as their primary source.
Who owns and regulates Williston Park (V)?
EPA lists Williston Park (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 Williston Park (V) have drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in October 2013. The violations listed here began between January 1996 and October 2013. By type: 2 monitoring and reporting, 1 required treatment not met and 1 contaminant level above the legal limit. The contaminants or rules involved are Nitrate, Lead, Total coliform bacteria (TCR) and Lead and Copper Rule. EPA lists 4 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 |
|---|---|---|---|---|
| 2013-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2007-01-01 | Required treatment not metMPL Non-Compliance · code 63 | Leadcode 1030 | Yes | Resolved |
| 2001-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1996-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
All 4 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 Park (V): frequently asked questions
Who runs Williston Park (V)?
Williston Park (V) (PWSID NY2902858) is a community water system owned by a local government. It is regulated by the NY state drinking water program.
How many people does Williston Park (V) serve?
Williston Park (V) reports serving 7,287 people through 2,432 service connections in Nassau County, New York.
Where does Williston Park (V) 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 Williston Park (V) have any drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in October 2013. 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 Park (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 4 violations for this system; 2 are health-based, and the most recent began in October 2013. For current results, consult the system's annual water quality report, EPA ECHO, or the NY state drinking water program.
Where can I find Williston Park (V)'s water quality report?
As a community water system, Williston Park (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 |
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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 Park (V), PWSID NY2902858, New York”, https://aquacensus.com/water-systems/new-york/williston-park-v-ny2902858 (data as of October 1, 2026).