sentences:  The ADPC tested water from wells across Gaighata block in North 24-Parganas as well as urine samples of 100 school children.The possibility of a low cost river water treatment plant utilizing water from Yamuna-Ichhamati at Gighata has been considered.However, this is not considered feasible because the river is highly polluted, costs would considerably increased because of installation of chemical treatment plant to remove pollutants, and the volume of water in the river in summer season is not sufficient.