when we are still living in Quezon City a few years ago, hindi kami bumibili sa mga water station ng tubig for drinking, iniinom na namin yung galing mismo sa faucet. wala naman nangyari sa amin though minsan nga may lasa. my father guaranteed us that it is safe to drink. BTW, my grandfather is a retired NAWASA/ MWSS employee and my father is currently a Manila Water employee.