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This website adopts the Web Content Accessibility Guidelines (WCAG 2.0) as the accessibility standard for all its related web development and services. WCAG 2.0 is also an international standard, ISO 40500. This certifies it as a stable and referenceable technical standard. 

WCAG 2.0 contains 12 guidelines organized under 4 principles: Perceivable, Operable, Understandable, and Robust (POUR for short). There are testable success criteria for each guideline. Compliance to these criteria is measured in three levels: A, AA, or AAA. A guide to understanding and implementing Web Content Accessibility Guidelines 2.0 is available at: https://www.w3.org/TR/UNDERSTANDING-WCAG20/

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Corporate Governance Scorecard CY 2021
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SERVICE ADVISORIES

MWSS Regulatory Office (RO) Chief Regulator Patrick Lester N. Ty's message of support for this year's 18-Day Campaign to End Violence Against Women (VAW)

Public Information Drive (PIDr) on the Rebate Program for affected Maynilad Water Services, Inc. customers within the Supply Zone of Putatan Water Treatment Plant

NWMC Message of Support from Atty. Melanie Sia-Lambino

Empower Her. Conserve Water

Governance Commission for GOCCs (GCG)

WHISTLEBLOWING WEB PORTAL

Which water concessionaire services your barangay? Find out here!

MWSS RO's Tribute to COVID-19 Frontliners

Water Conservation Message from Yesu Labrado

Water Conservation Message from Karl Bautista

Water Conservation Message from Ms. Alexa Macanan

Water Conservation Tips from Ms. Bea de Leon

Water Conservation Tips from Ms. Jules Samonte

METROPOLITAN WATERWORKS AND SEWERAGE SYSTEM
REGULATORY OFFICE

The Metropolitan Waterworks and Sewerage System Regulatory Office (MWSS RO) was created in August 1997 by virtue of the Concession Agreements signed between the MWSS and the two Concessionaires: Manila Water Company, Inc. (Manila Water) for the East Zone and Maynilad Water Services, Inc. (Maynilad) for the West Zone. On 31 March and 18 May 2021, the Revised Concession Agreements (RCAs) with Manila Water and Maynilad were signed respectively. The RCAs extended the period of the water concession to 31 July 2037.

The MWSS RO functions as a collegial body composed of five (5) Regulators. It is headed by the Chief Regulator who has overall responsibility for the operation of the office, and four (4) Deputy Administrators for Technical Regulation, Customer Service Regulation, Financial Regulation, and Administration and Legal Affairs.

Any action or decision by the MWSS RO on substantive matters affecting the RCA requires at least a majority vote of three (3) members. The Chief Regulator chairs meetings, has the final approval over the hiring and dismissal of all professional staff, and acts as the principal spokesperson of the MWSS RO.

The MWSS RO is mandated to monitor the performance of the Concessionaires with respect to their contractual obligations under the RCAs. Among its many functions, the MWSS RO reviews, monitors and enforces rates and service standards; arranges and reports regular independent audits of the performance of the Concessionaires; and monitors the infrastructure assets.

The functions of the MWSS RO are further stated in Executive Order (EO) No. 149, S. 2021 (signed by President Rodrigo Roa Duterte on 27 September 2021), which transfers the administrative supervision of the Metropolitan Waterworks and Sewerage System from the Department of Public Works and Highways to the Office of the President; and in Republic Act Nos. 11601 and 11600 (signed by President Duterte on December 10, 2021), which grant Manila Water and Maynilad 25-year franchises to establish, operate, and maintain a waterworks system and sewerage and sanitation services in the East and West Concession Areas, respectively.

The functions of the MWSS RO may change over time for the effective regulation of water and sewerage services.