Case study on ground water pollution in nagaland
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❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤Groundwater samples collected during monsoon and summer from both open and dug wells in an area of 270 km 2 , were analysed for eight ultra trace elements (Cd, Co, Cr, Cu, Mn, Ni, Pb and Zn). The mobility, concentration and geoaccumulation of these metals are impor-tant indices to quantify the levels of pollution. Data are presented as elemental contour maps of the Madras basin. The spatial distribution of these elements indicates the pathways of these elements entering the hydrological system during summer and monsoon. Elements such as Mn, Cr and Zn exceed the maximum permissible limits at certain locations. Heavy metals such as Cu, Pb, Cd, Ni, Cr and Mn control the metabolic activity in living organisms. Inter-elemental correlation and factor analyses indicate the gravity of the pollution in the Madras city environ-ment.