Water treatment machine operator (waterworks) operates and monitor treatment plant equipment to purify water for human consumption and industrial use. He/she controls the flow of raw water into plant by starting and regulating operation of electric motors, pumps and valves, adds specified amounts of chemicals to disinfect, deodorise and clarify water, or adjusts automatic devices which admit chemicals in controlled dosages. He/she starts agitators to mix ingredients and filters water through filtering material. He/she pumps purified water into water mains, monitors control panel meters and gauges to determine rate of flow and other factors.