Evaluation of the Degree of Pollution of the Ground Water Resources in Sedimentary Formations: Case of the Localities of Bingerville (Cote Divoire)

The access to drinking water in the rural zones constitutes a major concern for the authorities because of the quality of the water consumed by the village communities. The objective of this study is to assess the quality of the water intended for human consumption in the localities of Bingerville. Adopted methodology consisted in evaluating the level of pollution by the follow-up of the space variation of the contents of the various pollutants. Statistical tests were carried out to determine the probable origin of the pollutants met. A bacteriological analysis was carried out to evaluate the level of contamination of these resources. The results show that the contents of certain parameters, sources of pollution, remain high and often largely above standards WHO. The parameters more threatening remain the phosphate (PO42-) and ammonium (NH4+). The results of the statistical tests reveal two major phenomena which are the pollution of surface origin represented by factor 2 (F2) and mineralization on the level of factors 2 and 3 (F2 and F3). The indicators of pollution (PO42 -, NH4+ and NO3-) observed on the level of factor 1 show that the pollutants which threaten quality of these resources could come from the septic tanks as well as sites of breeding. These results are confirmed by the bacteriological tests through the proportioning of nutritive salts which made it possible to identify and count fecal and totalColiforms, fecal Streptococcusas well as Clostridium perfringens. The presence of these parameters makes these water resources unfit for consumption.