ASSESSMENT OF ARSENIC AND FLUORIDE CONTENT IN DIFFERENT DRINKING WATER SOURCES OF SECONDARY SCHOOLS IN GREATER GUWAHATI OF ASSAM, INDIAMD YAMIN HASSAN, MRIDUL BURAGOHAIN, MOYETREE SARMAH BEZBORUAH AND INDIBOR BURAGOHAIN
The present study was carried out to assess the drinking water quality in water sources used in different secondary schools of greater Guwahati, Assam with respect to arsenic and fluoride. In this study 40 samples were collected randomly from the study area during wet season in the year 2019. The study showed that 5%, samples were found contaminated with higher arsenic contents (WHO; arsenic 10 ppb for potable water). The most badly affected school was the Ganesh Mandir H.S. School where highest arsenic concentration was recorded 33.00 ppb at sampling point, A 25. With respect to fluoride the water samples of the study area were also contaminated by fluoride as 12.5% of analyzed water samples exceed the WHO drinking water standard (1.5 mg/L). The most badly affected school was the Hatigaon High School, at sampling point, F 51, where highest fluoride concentration was recorded 4.50 ppm.