Metropolitan Waterworks and Sewerage System
| Pangasiwaan ng Tubig at Alkantarilya sa Kalakhang Maynila | |
| MWSS Headquarters | |
| Agency overview | |
|---|---|
| Formed | June 19, 1971 | 
| Preceding agencies | 
 | 
| Type | Regulatory agency | 
| Headquarters | Katipunan Avenue, Balara, Diliman, Quezon City, Philippines | 
| Annual budget | ₱5.69 billion (2022) | 
| Agency executive | 
 | 
| Parent department | Office of the President of the Philippines | 
| Website | mwss | 
The Metropolitan Waterworks and Sewerage System (MWSS; Filipino: Pangasiwaan ng Tubig at Alkantarilya sa Kalakhang Maynila), formerly known as the National Waterworks and Sewerage Authority (NAWASA), is a government agency responsible for overseeing water privatization in Metro Manila and the nearby provinces of Cavite and Rizal, in the Philippines.
The agency divided the water concession into two zones: the East Zone, awarded to Manila Water, and the West Zone, awarded to Maynilad Water Services.