Metropolitan Water District of Southern California
E427265
The Metropolitan Water District of Southern California is a regional wholesale water agency that imports, manages, and distributes water supplies to numerous cities and local water districts across Southern California.
All labels observed (6)
How this entity was disambiguated
This entity first appeared as the object of triple T4272193 — 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: Metropolitan Water District of Southern California Context triple: [Parker Dam, suppliesWaterTo, Metropolitan Water District of Southern California]
-
A.
Mojave Water Agency
The Mojave Water Agency is a regional water management and planning agency in Southern California responsible for securing, conserving, and overseeing water resources for communities in the Mojave Desert region.
-
B.
Los Angeles Department of Water and Power
The Los Angeles Department of Water and Power is the largest municipal utility in the United States, providing water and electricity to the City of Los Angeles and overseeing key regional water resources.
-
C.
Contra Costa Water District
Contra Costa Water District is a public water agency in California that supplies drinking and irrigation water to communities in and around Contra Costa County.
-
D.
Valley Water
Valley Water is a picturesque pond located within Brooklyn’s historic Green-Wood Cemetery, known for its tranquil scenery and surrounding monuments.
-
E.
Santa Clara Valley Water District
Santa Clara Valley Water District is the public agency responsible for managing water supply, flood protection, and stream stewardship for Santa Clara County in California’s Silicon Valley.
- 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: Metropolitan Water District of Southern California Target entity description: The Metropolitan Water District of Southern California is a regional wholesale water agency that imports, manages, and distributes water supplies to numerous cities and local water districts across Southern California.
-
A.
Mojave Water Agency
The Mojave Water Agency is a regional water management and planning agency in Southern California responsible for securing, conserving, and overseeing water resources for communities in the Mojave Desert region.
-
B.
Los Angeles Department of Water and Power
The Los Angeles Department of Water and Power is the largest municipal utility in the United States, providing water and electricity to the City of Los Angeles and overseeing key regional water resources.
-
C.
Contra Costa Water District
Contra Costa Water District is a public water agency in California that supplies drinking and irrigation water to communities in and around Contra Costa County.
-
D.
Valley Water
Valley Water is a picturesque pond located within Brooklyn’s historic Green-Wood Cemetery, known for its tranquil scenery and surrounding monuments.
-
E.
Santa Clara Valley Water District
Santa Clara Valley Water District is the public agency responsible for managing water supply, flood protection, and stream stewardship for Santa Clara County in California’s Silicon Valley.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
public agency
ⓘ
regional wholesale water agency ⓘ special district ⓘ |
| abbreviation |
MWD
ⓘ
Metropolitan ⓘ |
| alsoKnownAs |
Metropolitan Water District
ⓘ
Metropolitan Water District of SoCal ⓘ |
| boardMembersRepresent | member agencies ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| focusesOn |
drought management
ⓘ
water conservation ⓘ water quality ⓘ water reliability ⓘ |
| foundedBy | California State Legislature ⓘ |
| fundingSource |
bonds
ⓘ
property taxes ⓘ wholesale water sales ⓘ |
| governanceStructure | board of directors ⓘ |
| hasJurisdictionOver | imported water supplies for Southern California ⓘ |
| headquartersLocation | Los Angeles, California ⓘ |
| importsWaterFrom |
Colorado River
ⓘ
State Water Project ⓘ |
| inception | 1928 ⓘ |
| industry | water supply ⓘ |
| legalForm | special district of the State of California ⓘ |
| operatesInfrastructure |
Colorado River Aqueduct
ⓘ
water distribution pipelines ⓘ water treatment plants ⓘ |
| primaryFunction |
importing water supplies
ⓘ
water resource management ⓘ wholesale water distribution ⓘ |
| regionServed | approximately 19 million people ⓘ |
| regulates | wholesale water rates to member agencies ⓘ |
| serviceArea |
Los Angeles County
ⓘ
Orange County ⓘ
linked to:
Orange County, California
Riverside County ⓘ San Bernardino County ⓘ San Diego County ⓘ Southern California ⓘ Ventura County ⓘ |
| state |
California
ⓘ
linked to:
California, United States
|
| subjectTo |
California water law
ⓘ
Colorado River Compact-related agreements ⓘ |
| suppliesWaterTo |
cities in Southern California
ⓘ
local water districts in Southern California ⓘ member agencies ⓘ |
| website | https://www.mwdh2o.com ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Metropolitan Water District of Southern California Description of subject: The Metropolitan Water District of Southern California is a regional wholesale water agency that imports, manages, and distributes water supplies to numerous cities and local water districts across Southern California.
Referenced by (16)
Full triples — surface form annotated when it differs from this entity's canonical label.
Greater Los Angeles hydrologic system
→
operatedBy
→
Metropolitan Water District of Southern California
ⓘ
linked to: Metropolitan Water District of Southern California
Metropolitan Water District of Southern California
→
alsoKnownAs
→
Metropolitan Water District of SoCal
ⓘ
linked to: Metropolitan Water District of Southern California
linked to: Metropolitan Water District of Southern California
Imperial Irrigation District
→
collaboratesWith
→
Metropolitan Water District of Southern California
ⓘ
Metropolitan Water District Building (Los Angeles)
→
originalClient
→
Metropolitan Water District of Southern California
ⓘ
Metropolitan Water District Building (Los Angeles)
→
partOf
→
Metropolitan Water District of Southern California facilities
ⓘ
linked to: Metropolitan Water District of Southern California
subject linked to:
Los Angeles (served via imported Colorado River water)
subject linked to:
Los Angeles (served via imported Colorado River water)
linked to: Metropolitan Water District of Southern California