Characteristics of Seepage Water Quality of Baisha Filter Well in Chongqing

Analyses of the seepage water quality in the filter well constructed by Baisha waterworks in Jiangjin, Chongqing reveal that, through infiltration of sandy gravel in the river bed, the micro- polluted, high turbid river water can be converted into seepage water with suspended substances and bacteria well removed and turbidity visibly reduced. The contents of NO-3, COD, BOD and TOC in the seepage water are obviously reduced, and the removal ratio is over 75%. The change of major components in content is remarkable, while the micro-components have not clear change in content. The quality of the seepage water accords with the national standard for drinking water quality, and can be used as domestic water directly.