Public water system · NY5130235
ActiveShelter Island Library
At a glance
Shelter Island Library (PWSID NY5130235) is an active transient non-community water system in Suffolk County, New York. It reports serving 258 people through 3 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
258
Service connections
3
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Shelter Island Library compare with other water systems in Suffolk County?
By EPA's size categories, Shelter Island Library is a very small system (500 people or fewer). Suffolk County has 151 active public water systems. Its population served is well below the county average of 9,192 people per system, and accounts for less than 0.1% 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 transient non-community water system reports serving 144 people, so Shelter Island Library is about 79% above that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. New York has 5,182 active transient non-community water systems, 63% 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 Shelter Island Library?
EPA lists Shelter Island Library 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. 38 of the 151 active systems in Suffolk County (25%) are also owned by a local government.
Does Shelter Island Library 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 Shelter Island Library. For the latest compliance status, check EPA ECHO for current compliance history.
Shelter Island Library: frequently asked questions
Who runs Shelter Island Library?
Shelter Island Library (PWSID NY5130235) is a transient non-community water system owned by a local government. It is regulated by the NY state drinking water program.
How many people does Shelter Island Library serve?
Shelter Island Library reports serving 258 people through 3 service connections in Suffolk County, New York.
Where does Shelter Island Library 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 Shelter Island Library have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Shelter Island Library'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 EPA ECHO, or the NY state drinking water program.
Where can I find Shelter Island Library's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Shelter Island Library is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
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, “Shelter Island Library, PWSID NY5130235, New York”, https://aquacensus.com/water-systems/new-york/shelter-island-library-ny5130235 (data as of October 1, 2026).