Israel continues to hold the world record for wastewater reuse. 90% of its 500 million cubic meters of wastewater is treated. 10% of that is released into rivers to maintain their quality. 325,000 acres of land is irrigated with recycled wastewater – nearly double that of 10 years ago.
http://israelnewtech.com/2015/03/israel-reported-to-hold-world-record-for-wastewater-reuse/