Integrated electrolytic and chemical method for producing clean treated water having cyanide species concentration less than 1 mg/liter. (a) Electrolytically treating cyanide-containing water having initial cyanide species concentration less than about 500 mg/liter, via synchronized operation of units: input, electrolytic reactor, recycle, output, and, power supply and process control, forming recycled electrolytically treated cyanide-containing water, (b) Stopping electrolytic treatment when cyanide species concentration decreases to first concentration value of about 10 per cent initial concentration, forming recycled electrolytically treated cyanide-containing water of first concentration value inside recycle tank of recycle unit, (c) Chemically treating recycled electrolytically treated cyanide-containing water with in-situ real time freshly generated hypochlorite ion solution electrolytically produced by an in-situ hypochlorite ion solution generating electrolytic reactor assembly in-line with recycle tank, (d) Stopping chemical treatment when cyanide species concentration decreases to second concentration value less than 1 mg/liter, forming clean treated water, (e) output to output unit.