Application of nemerow's pollution index (NPI) for groundwater quality assessment of bapatla mandal west region, coastal Andhra Pradesh, India

Pollution index is a powerful tool for assess the water quality. To remit the problem of lacking of good quality of water in Coastal Andhra Pradesh, India, it is the comprehensive pollution index method is one of the earliest methods for groundwater should be assessed objectively and reasonably, we collect the water samples from north east region of Bapatla mandal in three seasons such as pre monsoon, post monsoon, and winter in 2009, NPI was calculated for the water samples average values of three seasons. The experimental analysis was done for various Physico -chemical parameters such as pH, Electrical Conductivity, TH, Cl, Mg, F, Ca, TDS, NO₃ and SO₄. The results are compared with standards of WHO and BIS. The results show that the improved Nemerow's index method can be more comprehensive and more objective to reflect the status of groundwater the present study attempts that all sampling stations showed high NPI value and water samples from to bring an acute awareness among the people about the quality of ground water by taking specific locations for analysis.