Public water system · NY2902840
ActiveLiberty Utilities New York - Merrick
At a glance
Liberty Utilities New York - Merrick (PWSID NY2902840) is an active community water system in Nassau County, New York. It reports serving 135,000 people through 46,440 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in July 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
135,000
Service connections
46,440
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Liberty Utilities New York - Merrick compare with other water systems in Nassau County?
By EPA's size categories, Liberty Utilities New York - Merrick is a very large system (more than 100,000 people). Nassau County has 44 active public water systems, and Liberty Utilities New York - Merrick is the 2nd-largest of them by population served. Its population served is about 4.3 times the county average of 31,534 people per system, and accounts for 9.7% 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 Liberty Utilities New York - Merrick is about 20 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 Liberty Utilities New York - Merrick?
EPA lists Liberty Utilities New York - Merrick as privately owned. 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. 5 of the 44 active systems in Nassau County (11%) are also privately owned.
Does Liberty Utilities New York - Merrick have drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in July 2024. The violations listed here began between July 2015 and July 2024. By type: 9 monitoring and reporting and 3 required treatment not met. The contaminant or rule involved most often is Lead and Copper Rule (3 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 |
|---|---|---|---|---|
| 2024-07-01 | Required treatment not metWQP Entry Point/Tap Treatment Technique Non-Compliance · code 59 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2024-01-01 | Required treatment not metWQP Entry Point/Tap Treatment Technique Non-Compliance · code 59 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2023-07-01 | Required treatment not metWQP Entry Point/Tap Treatment Technique Non-Compliance · code 59 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2015-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Simazinecode 2037 | No | Resolved |
| 2015-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Di(2-ethylhexyl) adipatecode 2035 | No | Resolved |
| 2015-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Oxamylcode 2036 | No | Resolved |
| 2015-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Methoxychlorcode 2015 | No | Resolved |
| 2015-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Endrincode 2005 | No | Resolved |
| 2015-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | 2,4-Dcode 2105 | No | Resolved |
| 2015-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Hexachlorobenzenecode 2274 | No | Resolved |
| 2015-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzo(a)pyrenecode 2306 | No | Resolved |
| 2015-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Pentachlorophenolcode 2326 | 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.
Liberty Utilities New York - Merrick: frequently asked questions
Who runs Liberty Utilities New York - Merrick?
Liberty Utilities New York - Merrick (PWSID NY2902840) is a community water system privately owned. It is regulated by the NY state drinking water program.
How many people does Liberty Utilities New York - Merrick serve?
Liberty Utilities New York - Merrick reports serving 135,000 people through 46,440 service connections in Nassau County, New York.
Where does Liberty Utilities New York - Merrick 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 Liberty Utilities New York - Merrick have any drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in July 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 Liberty Utilities New York - Merrick'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, 3 are health-based, and the most recent began in July 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 Liberty Utilities New York - Merrick's water quality report?
As a community water system, Liberty Utilities New York - Merrick 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 |
| 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 |
| 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, “Liberty Utilities New York - Merrick, PWSID NY2902840, New York”, https://aquacensus.com/water-systems/new-york/liberty-utilities-new-york-merrick-ny2902840 (data as of October 1, 2026).