Ghemmit-Doulache, NOuslimani, N2023-05-292023-05-292021-05-01N. Ghemmit-Doulache, N. Ouslimani,WATER QUALITY CONTROL OF THREE SITES AT KEDARRA BARRAGE .Journal of Fundamental and Applied Sciences.VOL13 N02.01/05/2021.university of el oued [visited in ../../….]. available from [copy the link here]1112-9867http://dspace.univ-eloued.dz/handle/123456789/24922ArticleS tudy aim is to monitor water quality at three sites at Keddara barrage which 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 thos e 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 am monium contents. DCO/DBO 5 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. Keddar a barrage waters are charged with total coliform ba cteria, enterococcus and Escherichia coli, so these waters require bacteriological treatmentenKeddara barrage, Physical qualities , Chemical qualities , heavy metals , Microbiological qualityArticle