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１９９１～１９９３年广东省对城市生活饮用水水质进行了系统监测研究。结果表明城市水源水、出厂水、管网水、二次供水合格率为分别为４４．３％、７７．２％、８０．３％、６０．５％。水源水超标指标主要是铁、总大肠菌群、锰、ｐＨ等；出厂水超标指标主要是余氯和四氯化碳；二次洪水和末梢水超标指标主要是细菌学指标。三年来水源水质量有所提高，主要是生物性污染指标含量下降，出厂水、末梢水余氯合格率也有所上升。
From 1991 to 1993, Guangdong Province conducted systematic monitoring on the quality of urban drinking water. The results show that the passing rates of urban water source, factory water, pipe network water and secondary water supply are respectively 44.3%, 77.2%, 80.3% and 60.5%. Excessive water quality indicators are mainly iron, total coliform bacteria, manganese, pH, etc .; factory water exceeded indicators are mainly residual chlorine and carbon tetrachloride; secondary flood and peripheral water exceeded the standard indicators of bacteriological. In the past three years, the water quality of water sources has been raised, mainly due to the decrease in the content of biological pollution indicators, as well as the qualified rate of residual chlorine in factory water and peripheral water.