Abstract: Objectives To understand the sanitary quality and dynamic state of drinking water in rural areas of Chongqing, and provide data and basis for improving the quality of drinking water supply.Methods Sanitary survey and quality analysis on drinking water supply was carried out according to the 2014 National Monitoring Scheme for the Quality of Rural Drinking Water.Results A total of 943 water works were surveyed and 4 154 water samples collected in the dry and rainy seasons were analyzed. The main water source was surface water. The treatment processes of water in water works were different,completely treated, precipitated and filtrated, only disinfected or untreated waters were 63.10%, 27.04%, 5.62% and 4.24%, respectively. The qualified rates for finished water and terminal piped water were 46.6% and 42.5%, respectively. The qualified rates of water in the dry and rainy seasons were 46.1% and 47.2%, respectively. The qualified rate for water works with completed water treatment process showed markedly higher.Conclusions Microbiological contamination was the main factor influencing the quality of water supplies in rural areas. Strengthening the management,operation and treatment processes of water works, and ensuring the efficacy of water disinfection will substantially promote the qualified rate of drinking water in rural areas.