BACTERIOLOGICAL AND PHYSICO-CHEMICAL ANALYSIS OF IRRIGATION WATER SOURCES OF KOHAT, PAKISTAN

The present study was formatted to determine the irrigation quality of district Kohat Khyber Pakhtunkhwa of Pakistan. In Kohat dams, wells, tube wells, pressure pumps and springs water are used for irrigation purpose. All five types (dams, wells, tube wells, pressure pumps and springs) of irrigation water samples were exposed to bacteriological analysis which included, Total Coliform bacteria, Salmonella, Shigella, V.cholerae, Pseudomonas and E.coli. The. The Physico-chemical analysis includes (pH, Electric conductivity, Total hardness, Calcium hardness, Magnesium hardness, Total suspended solids, Iron, Arsenic, and Copper & Zinc). The bacteriological analysis result showed the presence of total Coliform bacteria (TCB) and E.coli in all sources of irrigation water and Salmonella, Shigella, V.cholerae, Pseudomonas in dams, springs and well water. The Physico-chemical analysis results showed that the ranges of pH(7, 6, 7.8, 7.5, 7.3), Electrical conductivity (420, 900, 400, 450, 850uScm1), Sodium (200, 200, 350, 400, 550 mg/L), Potassium (7, 7, 3, 6, 9 mg/L), Total hardness (250, 1200, 200, 400, 300 mg/L), Calcium hardness (200, 1300, 400, 100, 250 mg/L), Magnesium hardness (150, 320, 300, 350, 150 mg/L), Total suspended solids (7, 7, 32 ,6 ,8 mg/L), Arsenic(0.04, 0.06, 0.22, 0.05, 0.01 mg/L), Chlorides (290, 280, 590, 320, 230 mg/L), Zinc(0.08, 0.13, 0.04, 0.04, 0.17 mg/L), Copper(0.05, 0.03, 0.03, 0.02, 0.02.mg/L) and iron (1.8, 2,1.6, 2.7, 0.8.mg/L) respectively in the tube wells, springs, dams, Pressure pumps and well water .Bacteriological results showed presence of Total Coliform bacteria (TCB), Salmonella, Shigella, V.cholerae, Pseudomonas, E.coli. in dams, springs and well water sources that not fit for irrigation .The Physico-chemical analysis showed that all the parameters were found in range of FAO standard in different irrigation water sources except Total hardness were exceed in spring water.