Deer Island Wastewater Treatment Plant

E86978

infrastructure facility sewage treatment plant wastewater treatment plant

Deer Island Wastewater Treatment Plant is a major sewage treatment facility in Boston Harbor that serves the Greater Boston area and plays a key role in improving the region’s water quality.

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

All labels observed (2)

Label	Occurrences
Deer Island Waste Water Treatment Plant	2
Deer Island Wastewater Treatment Plant canonical	2

How this entity was disambiguated

This entity first appeared as the object of triple T720339 — 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: Deer Island Wastewater Treatment Plant
Context triple: [Massachusetts Water Resources Authority, operates, Deer Island Wastewater Treatment Plant]

A. Tracy Pumping Plant
Tracy Pumping Plant is a major water pumping facility in California that lifts and conveys water from the Sacramento–San Joaquin Delta into the Central Valley Project’s distribution system.
B. Jones Pumping Plant
Jones Pumping Plant is a major water pumping facility in California’s Central Valley that lifts and conveys water from the Sacramento-San Joaquin Delta into the Central Valley Project’s distribution system.
C. New Croton Reservoir
The New Croton Reservoir is a major water supply reservoir in Westchester County, New York, that forms a key part of New York City's Croton water system.
D. Harvey O. Banks Pumping Plant
The Harvey O. Banks Pumping Plant is a major water pumping facility in California that serves as a key intake and distribution hub for the State Water Project.
E. Croton Water Filtration Plant
The Croton Water Filtration Plant is a major underground water treatment facility in New York City that filters and improves drinking water drawn from the Croton water supply system.
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: Deer Island Wastewater Treatment Plant
Target entity description: Deer Island Wastewater Treatment Plant is a major sewage treatment facility in Boston Harbor that serves the Greater Boston area and plays a key role in improving the region’s water quality.

A. Tracy Pumping Plant
Tracy Pumping Plant is a major water pumping facility in California that lifts and conveys water from the Sacramento–San Joaquin Delta into the Central Valley Project’s distribution system.
B. Jones Pumping Plant
Jones Pumping Plant is a major water pumping facility in California’s Central Valley that lifts and conveys water from the Sacramento-San Joaquin Delta into the Central Valley Project’s distribution system.
C. New Croton Reservoir
The New Croton Reservoir is a major water supply reservoir in Westchester County, New York, that forms a key part of New York City's Croton water system.
D. Harvey O. Banks Pumping Plant
The Harvey O. Banks Pumping Plant is a major water pumping facility in California that serves as a key intake and distribution hub for the State Water Project.
E. Croton Water Filtration Plant
The Croton Water Filtration Plant is a major underground water treatment facility in New York City that filters and improves drinking water drawn from the Croton water supply system.
F. None of above. chosen

Statements (47)

Predicate	Object
instanceOf	infrastructure facility ⓘ sewage treatment plant ⓘ wastewater treatment plant ⓘ
connectsWith	Massachusetts Bay Outfall Tunnel ⓘ
coordinates	42.339°N 70.958°W ⓘ
country	United States of America ⓘ surface form: United States
dischargesTo	Massachusetts Bay ⓘ
environmentalImpact	improvement of Boston Harbor water quality ⓘ reduction of combined sewer overflows ⓘ reduction of sewage pollution in Boston Harbor ⓘ
hasHeritage	key component of Boston Harbor cleanup ⓘ
hasPart	dewatering facilities ⓘ digesters ⓘ effluent outfall system ⓘ odor control systems ⓘ primary treatment facilities ⓘ pumping stations ⓘ secondary treatment facilities ⓘ sludge processing facilities ⓘ treatment tanks ⓘ
inception	1990s ⓘ
industry	wastewater management ⓘ
locatedIn	Boston, Massachusetts ⓘ surface form: Boston Boston Harbor ⓘ Deer Island ⓘ Massachusetts ⓘ United States of America ⓘ surface form: United States
locatedInMetropolitanArea	Greater Boston ⓘ
locatedNear	Boston, Massachusetts ⓘ Hull, Massachusetts ⓘ Winthrop, Massachusetts ⓘ
locatedOnBodyOfWater	Boston Harbor ⓘ
operator	Massachusetts Water Resources Authority ⓘ
ownedBy	Massachusetts Water Resources Authority ⓘ
partOf	Boston Harbor ⓘ surface form: Boston Harbor Project
purpose	municipal wastewater treatment ⓘ sewage treatment ⓘ water quality improvement ⓘ
replaced	old Boston sewage treatment system ⓘ
serves	Greater Boston ⓘ
significantEvent	completion of major construction phases in the 1990s ⓘ start of secondary treatment operations ⓘ
usesProcess	disinfection ⓘ primary treatment ⓘ secondary treatment ⓘ sludge dewatering ⓘ sludge digestion ⓘ

How these facts were elicited

Referenced by (4)

Full triples — surface form annotated when it differs from this entity's canonical label.

Massachusetts Water Resources Authority → operates → Deer Island Wastewater Treatment Plant ⓘ

Deer Island → hasFacility → Deer Island Wastewater Treatment Plant ⓘ

Massachusetts Bay Outfall Tunnel → startPoint → Deer Island Wastewater Treatment Plant ⓘ

this entity surface form: Deer Island Waste Water Treatment Plant

Massachusetts Bay Outfall Tunnel → connectedTo → Deer Island Wastewater Treatment Plant ⓘ