Water crisis looms large if not enough monsoon rains July 4, 2021 Islamabad: Because of not enough snowfall during the last winter in the catchment area of Simly Dam, the main source of drinking water supply to the federal capital, the water level in the water reservoir has already dropped to 2,248 feet above sea level, the sources in the Water Management Division of the Capital Development Authority (CDA) told ‘The News’. The optimum level of the Simly water reservoir is 2,315 feet above sea level and the dead level is 2,233 feet above sea level. The sources told ‘The News’ that the withdrawal from Simly dam has already been cut down to half from the normal withdrawal of 32 million gallons per day (MGD).