The amount of rainfall in the Jericho area is less than that of the surrounding mountains and the coastal regions, thus Jericho area relies entirely for drinking and irrigation on subterranean wells and springs such as the Ein Al-Sultan spring. The source of this water is situated in the distant mountains. Ein Al-Sultan spring in considered to be the main source for agriculture. It has an output of 680 cubic meters an hour, and a salinity of 600 fractions in one million. It provides a steady output throughout the year. It is used equally for drinking water and for irrigating.