According to the West Bengal Pollution Control Board, in more than half of the blocks of Bengal, the water level is falling by 20 centimetres a year on average. In tandem, arsenic and fluoride contamination is also increasing. In rural areas, drinking water supply is largely dependent on non-electrified tube wells. Many such tube wells have already failed, while many of them are yielding contaminated water, creating a drinking water crisis. The falling water table has also led to the drying up of many water bodies, with a serious impact on local flora, fauna and the ecology. The government needs to map the demand pattern of different crops in the state.