Public water system · NY2902833
ActiveLocust Valley Wd
At a glance
Locust Valley Wd (PWSID NY2902833) is an active community water system in Nassau County, New York. It reports serving 7,500 people through 2,465 service connections. Its primary water source is groundwater, and EPA lists it as under public/private ownership. EPA's records list 2 violations for this system; all are health-based, and the most recent began in July 2004.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
7,500
Service connections
2,465
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Locust Valley Wd compare with other water systems in Nassau County?
By EPA's size categories, Locust Valley Wd 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 Locust Valley Wd is about 12% above 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 Locust Valley Wd?
EPA lists Locust Valley Wd as under public/private ownership. 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. 16 of the 44 active systems in Nassau County (36%) are also under public/private ownership.
Does Locust Valley Wd have drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in July 2004. The violations listed here began between December 2001 and July 2004. By type: 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). 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 |
|---|---|---|---|---|
| 2004-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2001-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | 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.
Locust Valley Wd: frequently asked questions
Who runs Locust Valley Wd?
Locust Valley Wd (PWSID NY2902833) is a community water system under public/private ownership. It is regulated by the NY state drinking water program.
How many people does Locust Valley Wd serve?
Locust Valley Wd reports serving 7,500 people through 2,465 service connections in Nassau County, New York.
Where does Locust Valley Wd 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 Locust Valley Wd have any drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in July 2004. 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 Locust Valley Wd'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; all are health-based, and the most recent began in July 2004. For current results, consult the system's annual water quality report, EPA ECHO, or the NY state drinking water program.
Where can I find Locust Valley Wd's water quality report?
As a community water system, Locust Valley Wd 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, “Locust Valley Wd, PWSID NY2902833, New York”, https://aquacensus.com/water-systems/new-york/locust-valley-wd-ny2902833 (data as of October 1, 2026).