The Gaza Strip Pleistocene granular aquifer is an extension of the Mediterranean seashore coastal aquifer. It extends from Askalan (Ashqelon) in the North to Rafah in the South, and from the seashore to 10 km inland. The aquifer is composed of different layers of dune sandstone, silt clays and loams appearing as lenses, which begin at the coast and feather out to about 5 km from the sea, separating the aquifer into major upper and deep sub-aquifers. The aquifer is built upon the marine marly clay (Saqiye group) from the Neocene [4], having a hydraulic conductivity of about 10−8 m/s [5]. In the east-south part of the Gaza Strip, the coastal aquifer is relatively thin and there are no discernible sub-aquifers [6].