Physico-chemical investigation of ground water quality of some areas of Imphal east district of Manipur during post-monsoon-2nd phase

Nandababu Singh Laishram

Abstract

Ten (10) ground water samples were collected from hand pumps of different locations of Imphal East district during post-monsoon of 2013 and they were analysed for physico-chemical parameters such as temperature, pH, electrical conductivity (EC), TDS (total dissolved solids), total hardness (TH), Ca2+, Mg2+, Na+, K+ and Cl-. All the ten samples (S-1 to S-10) are found to be fit for drinking purpose from physico-chemical analyses point of view as the values of different physico-chemical parameters are within the desirable limits of BIS standards for drinking water as well as that of WHO. But this does not guarantee that such ground waters are totally safe for drinking purpose. Further some investigations are necessary to examine whether toxic/carcinogenic metals such as As, Pb, Hg, Cd etc. are present beyond desirable limit or not. However, such ground waters are found to be fit for other domestic purpose as their TDS values are less than 1000mg/L and also fit for irrigation purpose as are evident from their values of electrical conductivity and SAR (sodium adsorption ratio). Further, correlation co-efficient data also show that the values of TDS, electrical conductivity and total hardness are mainly attributed to the concentrations of Ca2+, Mg2+ and Na+.