Besides the
state of West Bengal, some parts of the states of Bihar (the
middle Ganga plain, Bihar, India; e.g., Semria Ojha Patti village)
[62] and Uttar Pradesh (upper and middle Ganga plain,
India) are severely contaminated with As-rich groundwater
[63]. One study of 4780 tube well water samples from three
districts (Ballia, Varanasi, and Ghazipur in Uttar Pradesh in
the upper and middle Ganga plain, India) revealed that As
concentrations exceeded 10 μg/L in 46.5 %, 50 μg/L in
26.7 %, and 300 μg/L in 10 % of the samples (maximum As
concentration level, 3192 μg//L). Furthermore, the report indicated
that of the 989 villagers (691 adults, and 298 children)
screened, 137 (19.8 %) of the adults and 17 (5.7 %) of the
children had arsenical skin lesions, arsenical neuropathy, or
adverse obstetric outcomes [28].