Public water system · NY5111891
ActiveBrookhaven National Laboratory
At a glance
Brookhaven National Laboratory (PWSID NY5111891) is an active community water system in Suffolk County, New York. It reports serving 3,500 people through 134 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,500
Service connections
134
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Brookhaven National Laboratory compare with other water systems in Suffolk County?
By EPA's size categories, Brookhaven National Laboratory is a medium system (3,301 to 10,000 people). Suffolk County has 151 active public water systems. Its population served is about 62% below the county average of 9,192 people per system, and accounts for 0.3% of the 1,387,972 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 Brookhaven National Laboratory is about half of 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 Brookhaven National Laboratory?
EPA lists Brookhaven National Laboratory as owned by the federal 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. 3 of the 151 active systems in Suffolk County (2%) are also owned by the federal government.
Does Brookhaven National Laboratory have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Brookhaven National Laboratory. For the latest compliance status, check EPA ECHO for current compliance history.
Brookhaven National Laboratory: frequently asked questions
Who runs Brookhaven National Laboratory?
Brookhaven National Laboratory (PWSID NY5111891) is a community water system owned by the federal government. It is regulated by the NY state drinking water program.
How many people does Brookhaven National Laboratory serve?
Brookhaven National Laboratory reports serving 3,500 people through 134 service connections in Suffolk County, New York.
Where does Brookhaven National Laboratory 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 Brookhaven National Laboratory have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Brookhaven National Laboratory'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 Safe Drinking Water Act records list no violations for this system. For current results, consult the system's annual water quality report, EPA ECHO, or the NY state drinking water program.
Where can I find Brookhaven National Laboratory's water quality report?
As a community water system, Brookhaven National Laboratory 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 Suffolk County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Suffolk County Water Authority | Suffolk | 1,100,000 | Community | Groundwater |
| South Huntington Water District | Suffolk | 81,760 | Community | Groundwater |
| Greenlawn Water District | Suffolk | 42,000 | Community | Groundwater |
| Riverhead Water District | Suffolk | 35,000 | Community | Groundwater |
| Dix Hills Water District | Suffolk | 34,522 | Community | Groundwater |
| Smithtown Water District | Suffolk | 19,635 | Community | Purchased 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, “Brookhaven National Laboratory, PWSID NY5111891, New York”, https://aquacensus.com/water-systems/new-york/brookhaven-national-laboratory-ny5111891 (data as of October 1, 2026).