The need for desalination in Israel becme evident with the population growth and climate change which caused an alteration in the precipitation levels: instead of falling steadily throughout the winter, rain now falls intermittently, mainly during a few fierce storms. Rather than being gradually absorbed into the aquifers (water penetrable rock), these torrential downpours flow swiftly to the sea. There are three deslination plants in Israel - the Ashkelon plant, a plant in Hadera, and Sorek, which is the largest. Desalinated water today constitutes around 50% of the country’s water economy, and is used mainly for drinking, providing 80% of Israel’s tap water. Israel now has a 21st century water resource that is no longer reliant upon rainfall.