Water samples were collected once in every month
during April 2004 to March 2005 from two sites (middle
of the river stretch and a discharge point) at four
monitoring stations viz. Berhampore (BH), Palta (PA),
Dakshineswar (DK) and Uluberia (UL) on the river
Ganga, a 300 km stretch known as Bhagirathi-Hooghly
in West Bengal, India (Fig .1).