Author(s):

Kiran Kumari and Ashok Kumar Jha

Abstract: Owing to highest rate of siltation in the Koshi river, runoff and formation of wetlands, ground water samples of the Koshi region of Naugachia subdivision become contaminated with heavy metals and As. Arsenic occurs in water due to carrying off arsenic bearing mineral along with sediments and over exploitation of ground water for irrigation of crops. Some samples of Kharik Block have been tested for hardness, PH, conductivity and Arsenic. Almost all samples show hardness of water and contain arsenic below permissible limit. Some of the samples have PH more than permissible limit by W.H.O. The problem of iron is common in this region.

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