Colour was measured using the SQ 118 Photometer (Merck) in Hazen units. All the other inorganic water quality variables including NO3, NO2, Fe, Mn, Al, and F were measured in mg/l using the SQ 118 Photometer and the relevant test kits (Merck).
Colour was measured using the SQ 118 Photometer (Merck) inHazen units. All the other inorganic water quality variablesincluding NO3, NO2, Fe, Mn, Al, and F were measured in mg/lusing the SQ 118 Photometer and the relevant test kits (Merck).