The Green Panel has directed the local authorities in Delhi to state how they proposed to deal with the problem of declining water levels in the national capital. <br/><br/>The National Green Tribunal said that entire city of Delhi is over exploited in terms of groundwater. <br/><br/>The green panel also castigated the authorities for failing to perform their statutory obligation to provide adequate water supply. <br/><br/>A bench headed by NGT Chairperson Justice Swatanter Kumar ordered the concerned authorities to come to it with detailed action plan in two weeks.<br/><br/>It expressed concern over the fact that a large number of illegal and unauthorised borewells were being operated in the city and the authorities should take action against them.<br/><br/>As per the data available with the Central Groundwater Board under the Ministry of Water Resources, fresh groundwater was available at little below 33 feet in 1983. By 2011, this level had plummeted to 132 feet, registering the sharpest fall of almost 29 feet in the 2002-2011 period. The groundwater table across the city has declined from between 6 and 66 feet.