Metropolitan Waterworks and Sewerage System
E275431
The Metropolitan Waterworks and Sewerage System is a Philippine government agency responsible for providing and regulating water supply and sewerage services in Metro Manila and nearby areas.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Metropolitan Waterworks and Sewerage System canonical | 5 |
| MWSS Corporate Office | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2520350 — 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 Waterworks and Sewerage System Context triple: [La Mesa Eco Park, operator, Metropolitan Waterworks and Sewerage System]
-
A.
Puerto Rico Aqueducts and Sewers Authority
The Puerto Rico Aqueducts and Sewers Authority is the public corporation responsible for providing and managing drinking water and wastewater services across Puerto Rico.
-
B.
Pasig River Rehabilitation Commission
The Pasig River Rehabilitation Commission is a Philippine government body tasked with restoring, managing, and overseeing the environmental rehabilitation and sustainable development of the Pasig River and its surrounding areas.
-
C.
New York City Department of Environmental Protection
The New York City Department of Environmental Protection is the municipal agency responsible for managing the city’s water supply, wastewater treatment, and environmental regulation to protect public health and natural resources.
-
D.
District of Columbia Water and Sewer Authority
The District of Columbia Water and Sewer Authority is the public utility responsible for providing drinking water and wastewater services to Washington, D.C. and parts of the surrounding region.
-
E.
Eastpoint Water and Sewer District
Eastpoint Water and Sewer District is a local special district in Franklin County, Florida, responsible for providing water and sewer services to the Eastpoint community.
- 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 Waterworks and Sewerage System Target entity description: The Metropolitan Waterworks and Sewerage System is a Philippine government agency responsible for providing and regulating water supply and sewerage services in Metro Manila and nearby areas.
-
A.
Puerto Rico Aqueducts and Sewers Authority
The Puerto Rico Aqueducts and Sewers Authority is the public corporation responsible for providing and managing drinking water and wastewater services across Puerto Rico.
-
B.
Pasig River Rehabilitation Commission
The Pasig River Rehabilitation Commission is a Philippine government body tasked with restoring, managing, and overseeing the environmental rehabilitation and sustainable development of the Pasig River and its surrounding areas.
-
C.
New York City Department of Environmental Protection
The New York City Department of Environmental Protection is the municipal agency responsible for managing the city’s water supply, wastewater treatment, and environmental regulation to protect public health and natural resources.
-
D.
District of Columbia Water and Sewer Authority
The District of Columbia Water and Sewer Authority is the public utility responsible for providing drinking water and wastewater services to Washington, D.C. and parts of the surrounding region.
-
E.
Eastpoint Water and Sewer District
Eastpoint Water and Sewer District is a local special district in Franklin County, Florida, responsible for providing water and sewer services to the Eastpoint community.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
government agency
ⓘ
water utility regulator ⓘ |
| appliesRegulatoryFramework | concession agreements for Metro Manila water services ⓘ |
| continent | Asia ⓘ |
| country | Philippines ⓘ |
| hasOfficialWebsite | http://mwss.gov.ph/ ⓘ |
| hasPart |
Metropolitan Waterworks and Sewerage System
self-linksurface differs
ⓘ
surface form:
MWSS Corporate Office
MWSS Regulatory Office ⓘ |
| headquartersLocation |
Metro Manila
ⓘ
Quezon City ⓘ |
| industry |
sewerage services
ⓘ
water supply ⓘ |
| jurisdiction |
Philippines
ⓘ
surface form:
Republic of the Philippines
|
| languageOfWorkOrName |
English
ⓘ
Filipino ⓘ |
| legalForm | government-owned and controlled corporation ⓘ |
| locatedInAdministrativeTerritorialEntity |
Metro Manila
ⓘ
Philippines ⓘ Quezon City ⓘ |
| locatedInTimeZone | Philippine Standard Time ⓘ |
| mandate |
ensure effective collection, treatment, and disposal of wastewater and sewerage in its service area
ⓘ
provide and ensure an adequate and continuous supply of potable water in its service area ⓘ |
| ownedBy |
Philippine government
ⓘ
surface form:
Government of the Philippines
|
| parentOrganization |
Philippine government
ⓘ
surface form:
Government of the Philippines
|
| publicService |
sanitation
ⓘ
sewerage ⓘ water supply ⓘ |
| regionServed | National Capital Region ⓘ |
| regulates |
Manila Water Company, Inc.
ⓘ
Maynilad Water Services, Inc. ⓘ |
| responsibleFor |
operation and maintenance of waterworks infrastructure in its service area
ⓘ
provision of potable water in Metro Manila ⓘ regulation of sewerage services in its service area ⓘ |
| sector | public sector ⓘ |
| serves |
Metro Manila
ⓘ
Rizal province ⓘ
surface form:
Rizal Province
nearby areas of Metro Manila ⓘ |
| serviceType |
sewerage regulation
ⓘ
wastewater management oversight ⓘ water distribution oversight ⓘ water supply regulation ⓘ |
| shortName | MWSS ⓘ |
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 Waterworks and Sewerage System Description of subject: The Metropolitan Waterworks and Sewerage System is a Philippine government agency responsible for providing and regulating water supply and sewerage services in Metro Manila and nearby areas.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
Metropolitan Waterworks and Sewerage System
→
hasPart
→
Metropolitan Waterworks and Sewerage System
self-linksurface differs
ⓘ
this entity surface form:
MWSS Corporate Office