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Ground water is the major source of drinking water in India. Over exploitation of this water resource has exacerbated the situation of providing good quality water, due to the presence of major ions, minor ions, trace elements and radioactive elements. A study has carried out in Vellore, a city in the Northern part of the Tamilnadu, to understand the levels of Uranium concentrations and other geochemical parameters in drinking water. Samples were collected and the analysed for various water quality parameters in the laboratory and as well as insitu. Uranium concentration was estimated using the Quantalase Laser Fluorimeter and nearly 10 % of the samples show that the concentration of Uranium is exceeding the permissible limit .The low observed adverse effect level and No observed adverse effect level values were also assessed for to understand the risk due to the presence of the uranium in drinking water and it was observed that there is a slight risk on the public health due to the consumption of ground water in this region.

The objective of this study is to bring out the policy changes with respect to managed aquifer recharge (focusing on infiltration ponds), which in the view of relevant stakeholders may ease the problem of groundwater depletion in the context of Chennai City, Tamil Nadu, India. Groundwater is needed for the drinking water security of Chennai and overexploitation has resulted in depletion and seawater intrusion. Current policies at the municipal, state and national level all support recharge of groundwater and rainwater harvesting to counter groundwater depletion. However, despite such favorable policies, the legal framework and the administrative praxis do not support systematic approaches towards managed aquifer recharge in the periphery of Chennai. The present study confirms this, considering the mandates of governmental key-actors and a survey of the preferences and motives of stakeholder representatives. There are about 25 stakeholder groups with interests in groundwater issues, but they lack a common vision. For example, conflicting interest of stakeholders may hinder implementation of certain types of managed aquifer recharge methods. To overcome this problem, most stakeholders support the idea to establish an authority in the state for licensing groundwater extraction and overseeing managed aquifer recharge.