Public water system · NY2902827
ActiveHempstead (V)
At a glance
Hempstead (V) (PWSID NY2902827) is an active community water system in Nassau County, New York. It reports serving 56,000 people through 9,172 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
56,000
Service connections
9,172
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Hempstead (V) compare with other water systems in Nassau County?
By EPA's size categories, Hempstead (V) is a large system (10,001 to 100,000 people). Nassau County has 44 active public water systems, and Hempstead (V) is the 6th-largest of them by population served. Its population served is about 78% above the county average of 31,534 people per system, and accounts for 4% 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 Hempstead (V) is about 8.4 times 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 Hempstead (V)?
EPA lists Hempstead (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 Hempstead (V) have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2024. The violations listed here began between October 2012 and October 2024. By type: 11 monitoring and reporting and 1 reporting. The contaminant or rule involved most often is cis-1,2-Dichloroethylene (2 of them). EPA lists 12 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 |
|---|---|---|---|---|
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2016-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,2-Trichloroethanecode 2985 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylbenzenecode 2992 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Trichloroethylenecode 2984 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2012-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | No | Resolved |
The 12 most recent 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.
Hempstead (V): frequently asked questions
Who runs Hempstead (V)?
Hempstead (V) (PWSID NY2902827) is a community water system owned by a local government. It is regulated by the NY state drinking water program.
How many people does Hempstead (V) serve?
Hempstead (V) reports serving 56,000 people through 9,172 service connections in Nassau County, New York.
Where does Hempstead (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 Hempstead (V) have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2024. 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 Hempstead (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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the NY state drinking water program.
Where can I find Hempstead (V)'s water quality report?
As a community water system, Hempstead (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 |
| Hicksville Wd | Nassau | 48,000 | 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, “Hempstead (V), PWSID NY2902827, New York”, https://aquacensus.com/water-systems/new-york/hempstead-v-ny2902827 (data as of October 1, 2026).