In N’Djamena city,majority of population living there is connected to drinking water supply network.However,given untimely water cuts,some schools have chosen to carry out private drilling.Our objective is therefore ...In N’Djamena city,majority of population living there is connected to drinking water supply network.However,given untimely water cuts,some schools have chosen to carry out private drilling.Our objective is therefore to assess the quality of water intended for human consumption in these schools,to do this we have carried out a physico-chemical and bacteriological control on a number of water points.Seventeen(17)water points were collected during July 2015 and the physico-chemical parameters analyzed are as follows:pH,EC(Electrical Conductivity),TH(Total Hardness),turbidity,Ca^(2+),Mg^(2+),K^(+),Na^(+),Cl^(-),NO_(3)^(-),HCO_(3)^(-)and SO_(4)^(2-).In addition to this,we looked for possible undesirable germs,indicators of pollution.The results of physico-chemical analyses carried out show that water from most boreholes has good quality with the exception of drilling F7,which has a high conductivity,and drilling F_(3)whose turbidity is also high.Bacteriological analysis shows that all water points contain total germs,the other germs of faecal origin are mainly present in the F9 borehole.展开更多
文摘In N’Djamena city,majority of population living there is connected to drinking water supply network.However,given untimely water cuts,some schools have chosen to carry out private drilling.Our objective is therefore to assess the quality of water intended for human consumption in these schools,to do this we have carried out a physico-chemical and bacteriological control on a number of water points.Seventeen(17)water points were collected during July 2015 and the physico-chemical parameters analyzed are as follows:pH,EC(Electrical Conductivity),TH(Total Hardness),turbidity,Ca^(2+),Mg^(2+),K^(+),Na^(+),Cl^(-),NO_(3)^(-),HCO_(3)^(-)and SO_(4)^(2-).In addition to this,we looked for possible undesirable germs,indicators of pollution.The results of physico-chemical analyses carried out show that water from most boreholes has good quality with the exception of drilling F7,which has a high conductivity,and drilling F_(3)whose turbidity is also high.Bacteriological analysis shows that all water points contain total germs,the other germs of faecal origin are mainly present in the F9 borehole.
