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This research was embarked upon to assess the changes in the physical and chemical properties of piped-borne water supplied in Kano metropolis from the treatment plants(challawa and tamburawa plants), along the distribution lines to the various points of use. Samples of piped water were collected from selected points of use (zones) including raw and treated water from the treatment plants and analyzed for selected physical parameters- pH, alkalinity, conductivity, turbidity, total dissolved solids, total suspended solids and chemical parameters -chlorides, sulphates, nitrates, nitrites and trace metals which includes sodium, potassium, calcium, magnesium, lead, cadmium, chromium, manganese, iron, nickel, zinc, and copper. The results show that all the physical parameters were within the world health organization WHO acceptable limits with the exception of turbidity and total suspended solids of sharada zone with 208 NTU and 193mg/L respectively. All the chemical parameters were within the thresholds limits including all the metals analyzed which were present in concentrations permitted by the WHO for a quality drinking water. Mean concentration of some of the metals were found as follows: Pb (0.0021± 0.0005) mg/L, Fe (0.0024± 0.0005, Zn (0.0017± 0.0005) mg/L, Cu (0.0038± 0.0008) mg/L, Ca (0.0430± 0.00078) mg/L and Mg (0.0224± 0.0064) mg/L. The study indicates that despite all the parameters meeting the WHO laid out standards, the purification processes and distribution lines (pipes) need to be reviewed periodically and checked thoroughly for possible contamination and ways to prevent it so as to achieve wholesome drinking water for the general public.

Quality Assessment of the Changes in the Physico-Chemical Parameters in Pipe-Borne Water Supplied In Kano Metropolis, Nigeria