Surveys conducted by the Central Ground Water Authority (CGWA) suggest the ground water level has gone down by as much as 10 metres over the past year in some south Delhi areas. The lowest level of water was noticed in Lado Sarai. The alarming depletion in the ground water level across the city is also being linked to the large number of Delhi Jal Board (DJB) tube-wells. Sumita Dasgupta, coordinator, Centre for Science and Environment (CSE), said,