While not accurate, the term “toilet to tap” makes great headlines. The use of recycled wastewater to supplement drinking-water supplies is in the news, especially in drought-prone states like California, which has invested $1 billion in the technology.In reality, the concept is not new. The $481 million Groundwater Replenishment System (GWRS) in Fountain Valley went online in January 2008 as a jointly funded project of the Orange County Water District and the Orange County Sanitation District. It replaced the original Water Factory 21 that went online in 1976 and pumped treated wastewater into injection wells to prevent saltwater intrusion into
