The process for irrigation of a man-made landscaped area, such as a golf course, playing field or agricultural area, involves monitoring a sample of reclaimed water, a sample of soil containing reclaimed water, or both from a supply of reclaimed water, and treating it when necessary to avoid harmful effects to plantlife, and irrigating with the treated water via a subterranean distribution system. The sample is tested with monitors for water quality characteristics, including: total organic carbon compounds; pH; residual chlorine; chlorides; and, sodium. These results are inputted to a computerized data handling system for data collection, storage and analysis for comparison to predetermined acceptable ranges to show deviation from acceptable ranges. Either alarms are set off or treatment occurs or both, when deviations are observed. Treatment may include a dechlorination system, an oxidation system, reverse osmosis system. Other monitors may be for hardness; turbidity; alkalinity; conductivity and nitrates.