ASSESSMENT OF THE QUALITY OF DRINKING WATER IN .
Ni, Pb and Zn. The concentration levels for Cd, Co, Cr, Cu, Fe, Mn,. Ni, Pb and Zn werein drinking water permitted by the Sudanese Standards and Metrology. Organization .. land is available, and require a much larger area than a rapid gravity .. Trace elements in natural water are copper, cobalt, zinc, molybdenum,.Live Chat