Title: Occurrence and Sources of Bromate in the Chlorinated Tap Drinking Water in Metropolitan

Title: Occurrence and Sources of Bromate in the Chlorinated Tap Drinking Water in Metropolitan Manila, Philippines

Homer C. Genuino and Maria Pythias B. Espino

LIST OF SUPPLEMENTAL INFORMATION

Fig. S1Schematic diagram of the water treatment processes at the Balara Water Treatment Plants 1 and 2

Fig. S2Schematic diagram of the University of the PhilippinesSewage Treatment Plant operations indicating the two sampling points

Table S1 Monthly data from October 2006 to June 2007 for the average of rainfall (mm) and temperature (oC) reported by the Philippine Atmospheric, Geophysical and Astronomical Services Administration

Table S2Average levels of residual chlorine in tap drinking water in the distributionsystem serviced by Manila Water Company, Incorporated (MWCI) (data were obtained from the Central Laboratory report of MWCI submitted to MWSS)

Table S3Average levels of residual chlorine in tap drinking water in the distribution system serviced by Maynilad Water Services Incorporated (MWSI) (data were obtained from the Central Laboratory report of MWSI submitted to MWSS)

Table S4 Step-by-step calculation of the mass balance on bromate and hypochlorite analyses of wastewaterfrom University of the Philippines Sewage Treatment Plant (calculations adopted from the work of Weinberg et al. (2003))

Fig.S1

Fig.S2

Table S1

a PAGASA weather station science garden, Agham Road, Diliman, Quezon City

b Port Area, Intramuros, Manila

Table S2

Table S3

Table S4

aobtained from the January 2007 data