Objectives To investgate the status of microbial contamination of rural centralized water supply in Jiangxi province, so as to provide a scientific basis for the improvement of water quality of rural centralized water supply.
Methods In 2008-2011, 13 638 drinking water samples from 6 819 centralized water supply points in rural areas of Jangxi Province were monitored according to 'Standard Detection Methods for Drinking Water' GB 5750-2006.The samples were obtained in dry season(March to May) and wet season(August to October) respectively.
Results The total qualified rate of microbial indicators for the finished water was 47.99%, the terminal tap water was 44.02%.The microbial indicators showed statistically significant difference among centralized water supplies with a variety of water sources as well as water treatment processes(P < 0.01).Among the microbiological indexes, the qualified rate of total coliform was the lowest, which the finished water was 49.85%, and the terminal tap water was 46.27%.
Conclusions The total qualified rate of microbial indicators in rural centralized water supply is related to the factors like the types of water source and water treatment process.Therefore, it is substantial to strengthen the protection of water source and prevention of water-borne diseases, improve the process of water purification, as well as promote health education in order to ensure the rural residents drinking safe water.
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