Drinking water chlorination is affected by many factors including chlorine dose, pH, temperature and contact time. Diminutive work has been reported regarding the bacterial pollution of drinking water in Pakistan. In addition, no proper conditions have been reported for effective chlorination system to meet WHO and EPA drinking water quality standards. This book presents the study designed to optimize the required conditions for chlorination for maximum inactivation of E. coli and Salmonella in distilled, tap and well water. Three different dosages; 0.25,0.5 and 1.0 mg/L were applied. Samples...