Water treatment Timeline By jesscody Period: Jan 1, 1950 to Jan 1, 2011 International water recycling Timeline Jan 1, 1962 Montebello, Los Angeles County, USA is using treated water Jan 1, 1976 Orange County, California,USA opens water treatment plant this year Jan 1, 1978 Upper Occoquan, Virginia USA opens safe water treatment plants. Jan 1, 1997 Essex, UK, begins recycling water. Jan 1, 2000 Singapore uses water treatment plants. Jul 1, 2002 Veurne- Ambacht, Belgium treats wastewater.