Groundwater survey in Ghazipur, Varanasi and Mirzapur districts of Uttar Pradesh (UP) in Middle Ganga Plain shows that people in these areas are

The middle and upper Ganga plains covering the upstream part from Rajmahal Hills, were earlier considered to be free from arsenic groundwater contamination. Initially, the contamination (>0.05 mg/l) was reported in 2002 from two villages, Bariswan and Simaria Ojhapatti of Bhojpur district of Bihar.