The Metropolitan Waterworks and Sewerage System Regulatory Office (MWSS-RO) is headed by a Chief Regulator whose main duty is to provide the overall direction and guidance relative to program operation to four Regulation Areas. These are the (1) Technical Regulation Area, (2) Customer Service Regulation Area, (3) Financial Regulation Area, and (4) Administration and Legal Affairs.

Specifically:
Direction as to the proper and appropriate implementation of the office policies and guidelines in accordance with the standard office procedures and in pursuit of the RO’s vision-mission;
Direction regarding creation of public awareness with regard to RO’s operation and accomplishments;

The Chief Regulator has the sole responsibility to implement the directives of the MWSS Board of Trustees. He also acts as the principal spokesperson of the office.