Manila Water will spend P115 billion more to complete its sewerage program by 2037. To date, Manila Water operates 38 STPs and 2 septage treatment plants with a total capacity of 310 MLD. "Since 1997 when we took over the East Zone, we have spent P38.5 billion on our wastewater programs from collections of only P36.9 billion. So, we have excess investments of P1.6 billion and we expect this trend to continue," said Manila Water Chief Operating Officer Abelardo P. Basilio.