2.2. Watersampling
In this study, a total of 49 water samples were collected using the techniques proposed by the manufacturer (RAD7 RAD H2O). All water samples (without bubbles) were collected in dedicated 250-ml glass bottles.14 drinking water samples were collected from universities and dormitories (in the University Village),while 35 drinking water samples were collected from the source drilled wells (tubewells) and water taps. During sampling a water, the water source flowed for 10 min before taking the sample (RAD7
RAD H2O), in order to let out the water from a possibly stagnant pipe section and to obtain parameters characteristic of the fresh water. pH values are an important indicator of water quality be-cause water with a low pH can damage the piping of the dis-tribution system, leading to contamination (Sahin etal.,2013). The pH measurements for each sample/location were done by using a portable “OAKTON pH TESTER 30” device.