Razon-led Manila Water Co. has commenced drawing raw water from the Upper Wawa Dam to supply its Calawis treatment facility, a move aimed at bolstering service reliability for approximately 100,000 residents in Antipolo City as traditional reservoirs face seasonal strain.In a statement on Wednesday, May 13, the East Zone concessionaire announced that the Calawis Water Treatment Plant is currently receiving between 25 million and 30 million liter…