 Water services used to be provided by the Metropolitan Waterworks and Sewerage System , which served 30 % of the city with most other sewage being directly dumped into storm drains , septic tanks , or open canals . MWSS was privatized in 1997 which split the water concession into the east and west zones . The Maynilad Water Services took over the west zone of which Manila is a part . It now provides the supply and delivery of potable water and sewerage system in Manila , but it does not provide service to the southeastern part of the city which belongs to the east zone that is served by Manila Water . Electric services are provided by Meralco , the sole electric power distributor in Metro Manila . 
 Water services used to be provided by the Metropolitan Waterworks and Sewerage System , which served 30 % of the city with most other sewage being directly dumped into storm drains , septic tanks , or open canals . MWSS was privatized in 1997 which split the water concession into the east and west zones . The Maynilad Water Services took over the west zone of which Manila <a href='drop_aux' title='1'><mark>is</mark></a>a part . It now <a href='uninflect' title='2'><mark>provides</mark></a> the supply and delivery of potable water and sewerage system in Manila , but it <a href='uninflect' title='3'><mark>does</mark></a> not provide <a href='negative_concord' title='4'><mark>service</mark></a> to the southeastern part of the city which <a href='uninflect' title='5'><mark>belongs</mark></a> to the east zone <a href='null_relcl' title='6'><mark>that</mark></a>is served by Manila Water . Electric services are provided by Meralco , the sole electric power distributor in Metro Manila . 
Water services used to b provided by the Metropolitan Waterworks and Sewerage System , which served 30 % of the city w most other sewage bein directly dumped into storm drains , septic tanks , or open canals . MWSS was privatized in 1997 which split da water concession into the east and west zones . TdaMaynilad Water Services took ova thdaest zone of which Manila a part . It now provide the supply and delivery of potable water and sewerage system in Manila , but it do not provide no service to the southeastern part of thedaty which belong to the east zone is served by Manila Water . Electric services are provided by Meralco , the dae electric power distributor in Metro Manila .