WATER QUALITY CONTROL OF THREE SITES AT KEDARRA BARRAGE

Study aim is to monitor water quality at three sites at Keddara barrage witch located on territory of Boumerdes-Algeria. Physico-chemical, bacteriological and heavy metal analyses were carried out on waters feeding barrage site A, within barrage site B and those leaving barrage corresponding to pumping waters site C. Physical qualities of all three waters largely meet WHO standards. Chemical qualities Results showed that hardness is greater at site C. A mineralization with low nitrate, chloride, phosphate and ammonium contents. DCO/DBO5 ratio < 3 (for all three sites), indicating that source of water pollution is of organic origin. Analysis results of all three samples by SAA revealed traces of heavy metals which confirm good water quality. Keddara barrage waters are charged with total coliform bacteria, enterococcus and Escherichia-coli, so these waters require bacteriological treatment.