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The quality of urban drinking water has a great influence on the life and work of the residents. Only when the water quality reaches the National Standard, the safety of the residents and the development of society and economy can be guaranteed. In order to study the water quality of tap water in Guangzhou, 42 indicators from 8 water plants in Guangzhou were selected as sample data, and the grey correlation method was used to analyze and evaluate the indicators. The results showed that the water quality of each waterworks met the national sanitary standard for drinking water, among which the water quality of  D, G  and  H  waterworks was better than that of  E  and  F  waterworks. Based on the comparative analysis of the test indexes, some suggestions for improving the water quality of the factory are put forward. The grey correlation method can be used to evaluate the water quality of waterworks, which can not only make full use of the original data, but also be easy to calculate and the evaluation result is objective, it’s very practical.

Analysis of Water Quality of Guangzhou Waterworks Based on Grey Correlation Method