当前世界环境

The paper reports analysis ofphysico-chemicalcharacteristics of underground drinking water of industrial areas of Korba in Chattisgarh state. This studyanalysedquarterlyphysico-chemicaldata collected from four sampling stations in Korba and its surrounding industrial areas from January 2006 to December 2007. The results of this analysisrevealsthat electrical conductivity of water samples was found to be as high as 547.20 µmho/cm during April 2007 atBhadrapara. The maximum value of the total dissolved solids and total solids recorded was 550 mg/l in July 2007 and 660 mg/l in April 2007 atBhadraparawhich is higher than permissible limit of WHO standards (>500mg/l). The value of COD and total hardness of the various sample were always higher than the permissible limits. COD of the water samples recorded a maximum of 190mg/l atBhadraparaduring April 2007. High values of fluoride (>1mg/l) and nitrate (>10mg/l) concentration were recorded at some stations. All the samples had chloride concentration within the permissible limit ranging from 16.24mg/l at Parsabhatta in October 2006 to 176.2 mg/l at Kosabari in April 2007. It is found that all water samples are free phosphate pollution as the amount of phosphate varied from 0.05mg/l at Kosabari in October 2006 to 0.88mg/l atBhadraparain July 2007 during the entire studyperio