Abstract:Groundwater vulnerability reflects the pollution potentiality of the groundwater. It can provide scientific basis for land use planning, groundwater resources reservation programs and groundwater quality monitoring, etc. Adopting DRASTIC, the groundwater vulnerability evaluation methodology of the US EPA, an assessment of groundwater vulnerability has been carried out in main urban areas of Weihai city. It can not only provide scientific basis for reasonable exploitation and utilization of groundwater, but also is helpful for groundwater resources reservation and coordinated development of city construction.