Desalination Costs coming down.

 "Israeli scientists work to make desalination more efficient and affordable, among them, developed a chemical-free system using porous lava stone to capture the microorganisms before they reach the membranes. It's just one of the many breakthroughs in membrane technology that have starkly lowered the cost of desalination. Desalination used to be an expensive energy hog, but the scientists changed the game. Inside Sorek, the Israeli desalination plant that is the world's largest and most advanced, it costs just a third of what it did in the 1990s to desalinate sea water. Sorek can produce a thousand liters of drinking water for 58 cents. Israeli households pay about US$30 a month for their water - similar to households in most U.S. cities, and far less than Las Vegas (US$47) or Los Angeles (US$58)." 

https://forum.lowyat.net/topic/4017447/all