Israeli water technology experts went to Sacramento (twinned with Israel’s Ashkelon), to demonstrate smart ways to secure water from a desert. These included recycling wastewater, desalination, detecting leaky pipes and different charging structures for water purity. US cities Los Angeles and Beverly Hills are also partnering with Israel for water conservation.
http://www.kcra.com/news/israel-offers-droughtbusting-tips-for-california/33535818