About 70 percent of Lahore's water supply is contaminated due to a lack of chlorification, a recent survey conducted by the Environment Protection Department (EPD) has revealed. EPD Secretary Zafar Iqbal said that following the first monsoon rain he had ordered EPD staff to collect water samples from across the city. He said that 183 samples had been collected, of which 120 had been tested. Iqbal said that the samples had been collected from water tanks, hand pumps, pipes and other supply sources.