Objectives To investigate the quality of drinking water in relevant hotels and other units and to provide security for drinking water in the Seventh National Peasant Games.
Methods Monitoring the quality of water from municipal centralized water supplies, self-constructed water supplies and secondary water supplies. The water samples were tested according to the Standard Examination Methods for Drinking Water (GB/T 5750-2006), and the results were analyzed and assessed according to the Standards for Drinking Water Quality (GB 5749-2006).
Results The qualified rate of 737 tested water samples was 85.89%; the quality of municipal centralized water supply was better than that of self-constructed central water supplies and secondary water supplies. The qualified rate for residual chlorine was 87.51%, for the total number of colonies was 94.03%, for oxygen consumption was 96.07%, for total coliforms was 97.01% and for themotolerant coliforms was 98.51%.
Conclusions There was a high qualified rate for drinking water in Nanyang, and the main factors causing disqualification of drinking water were residual disinfectants and microbiological indices. Construction and management should be strengthened in order to protect the safety of drinking water.
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