bids are invited for testing of water supply samples by nabl accredited lab at naa under ge ( north ) tezpur - provn of testing of water samples by nabl accredited lab at naa under ge ( north ) tezpur:- ( a ) gr. i - physical parameters ( primary test ) includes :- ( i ) ph ( ii ) odor ( iii ) tds ( total dissolved solids ) . ( iv ) turbidity. ( v ) taste. ( vi ) colour. ( b ) gr-ii ( a ) - chemical parameters includes :- ( i ) alkalinity. ( ii ) calcium. ( iii ) iron. ( iv ) total hardness. ( v ) manganese. ( vi ) nitrate. ( vii ) fluride. ( viii ) chloride ( ix ) residual chlorine. ( x ) sulphate. ( xi ) sulphide. ( xii ) selenium. ( xiii ) copper. ( xiv ) zinc. ( xv ) silver. ( xvi ) chloramines. ( xvii ) aluminium. ( xviii ) phenolic compounds. ( xix ) oil & grease. ( xx ) anionic surface active agent. ( xxi ) boron. ( xxii ) ammonia. ( c ) gr-ii ( b ) :- heavy metal ( toxic ) parameters includes :- ( i ) mercury. ( ii ) cadmium. ( iii ) arsenic. ( iv ) cyanide. ( v ) lead. ( vi ) molybdenum. ( vii ) chromium. ( viii ) nickel. ( ix ) polychlorinated biphenyls . ( x ) polynuclear aromic hydrocarbons. ( xi ) trihalomethanes. ( d ) gr-iii ( a ) - miccrobiological test includes :- ( i ) escherichia coli. ( ii ) coliform bacteria. ( e ) pesticide group ( f ) parasitological analysis ( g ) virological analysis ( h ) 5 ltr water can total quantity : 1