Well , no one could survive without water , but you see pollution has been making more and more water unable for drinking .   Yeah . Water pollution has for a long time been a major concern among the environmental issues .   But what are the sources of water pollution ?   They could generally be divided into two categories   Well , direct ones are the pollution directly from factories , refineries waste treatment plants etc . , aren ’ t they ?   Yeah . They are emitted directly into urban water supplies .   But what about the indirect ones ?   Indirect sources include contaminants that enter the water supply from soils or groundwater systems and from the atmosphere via rainwater .   I see . For the sake of us all , we should be an active participator in the prevention of it . 