Catskill-Delaware Watershed

E116241

drinking water watershed protected watershed surface water supply system

The Catskill-Delaware Watershed is a major protected watershed system in southeastern New York that supplies most of New York City’s unfiltered drinking water.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (6)

Label	Occurrences
Catskill–Delaware watershed	2
Catskill Mountains watershed	1
Catskill watershed	1
Catskill-Delaware Watershed canonical	1
Catskill–Delaware watershed system	1
New York City upstate watershed lands	1

How this entity was disambiguated

This entity first appeared as the object of triple T798263 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Catskill-Delaware Watershed
Context triple: [Catskill Mountains, partOf, Catskill-Delaware Watershed]

A. Esopus Creek
Esopus Creek is a scenic stream in New York’s Catskill Mountains known for trout fishing, recreation, and its role in the New York City water supply system.
B. Raritan River
The Raritan River is a major river in central New Jersey that flows eastward into Raritan Bay and serves as an important natural and historical waterway for the region.
C. Mystic River watershed
The Mystic River watershed is a drainage basin in the Greater Boston area of Massachusetts that collects water from numerous rivers and streams before emptying into Boston Harbor.
D. Delaware River
The Delaware River is a major waterway in the northeastern United States that forms part of the borders of several states and flows past major cities including Philadelphia before emptying into the Delaware Bay.
E. Rondout Creek
Rondout Creek is a significant stream in southeastern New York that flows through the Catskill region and the city of Kingston before joining the Hudson River.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Catskill-Delaware Watershed
Target entity description: The Catskill-Delaware Watershed is a major protected watershed system in southeastern New York that supplies most of New York City’s unfiltered drinking water.

A. Esopus Creek
Esopus Creek is a scenic stream in New York’s Catskill Mountains known for trout fishing, recreation, and its role in the New York City water supply system.
B. Raritan River
The Raritan River is a major river in central New Jersey that flows eastward into Raritan Bay and serves as an important natural and historical waterway for the region.
C. Mystic River watershed
The Mystic River watershed is a drainage basin in the Greater Boston area of Massachusetts that collects water from numerous rivers and streams before emptying into Boston Harbor.
D. Delaware River
The Delaware River is a major waterway in the northeastern United States that forms part of the borders of several states and flows past major cities including Philadelphia before emptying into the Delaware Bay.
E. Rondout Creek
Rondout Creek is a significant stream in southeastern New York that flows through the Catskill region and the city of Kingston before joining the Hudson River.
F. None of above. chosen

Statements (48)

Predicate	Object
instanceOf	drinking water watershed ⓘ protected watershed ⓘ surface water supply system ⓘ
associatedWith	Catskill Park ⓘ Delaware County, New York ⓘ Greene County, New York NERFINISHED ⓘ Sullivan County, New York NERFINISHED ⓘ Ulster County, New York ⓘ linked to: Ulster County
beneficiary	New York City residents ⓘ downstate New York communities ⓘ
connectedTo	Catskill Aqueduct ⓘ Delaware Aqueduct ⓘ
contains	Ashokan Reservoir ⓘ Cannonsville Reservoir ⓘ Neversink Reservoir ⓘ Pepacton Reservoir ⓘ Rondout Reservoir ⓘ Schoharie Reservoir ⓘ
country	United States ⓘ linked to: United States of America
ecologicalRole	habitat for forest and aquatic species ⓘ
environmentalConcern	land development pressure ⓘ nonpoint source pollution ⓘ nutrient runoff ⓘ pathogen contamination risk ⓘ
governedBy	New York State environmental regulations ⓘ federal Safe Drinking Water Act requirements ⓘ
hasFeature	agricultural best management practices ⓘ conservation easements ⓘ land use controls ⓘ watershed protection programs ⓘ
landOwnership	mix of public and private lands ⓘ
locatedIn	New York State ⓘ linked to: New York southeastern New York ⓘ
managedBy	New York City Department of Environmental Protection ⓘ
managedThrough	watershed partnership programs ⓘ
partOf	New York City water supply system ⓘ
primaryUse	municipal water supply ⓘ
protectedFor	drinking water quality ⓘ public health ⓘ
purpose	to provide high-quality drinking water without filtration ⓘ
regulatoryStatus	Filtration Avoidance Determination system ⓘ
suppliesWaterTo	New York City ⓘ
supportsActivity	recreational fishing (regulated) ⓘ regulated boating on some reservoirs ⓘ
waterDeliveryMethod	gravity-fed aqueduct system ⓘ
waterSource	Catskill Mountains ⓘ Delaware River basin ⓘ linked to: Delaware River watershed
waterType	unfiltered drinking water ⓘ

How these facts were elicited