Analysis of Rural Drinking Water Quality Monitoring Results in Guangxi in 2007-2008

Objective To understand and master the dynamic changes and contributing factors to Guangxi rural drinking water quality. Methods No less than 25% of counties in Guangxi Zhuang Autonomous Region were randomly selected according to the proportional stratified sampling method to build the monitoring network for the dynamic monitoring of rural drinking water quality. The sampling time was arranged in the rainy (July or August) and dry season (March or November) in 2007 and 2008, respectively. The test methods were those documented in the standard (GB 5750-2006). Results The coverage rate of rural centralized water supply was 35.72% in 2008, higher than that in 2007 (31.80%) by 3.92%; the eligible rate of water quality in 2007 and 2008 were 20.57% and 24.59% respectively. The eligible rate of water quality in dry season was higher compared with that in the rainy season. Among all the monitoring indexes, the microbiological index ranked the lowest in terms of eligible rate, ranging from 34.76% to 80.68% for central water systems, and from 21.43% to 66.57% for non-central water supply. Conclusion Microbiological pollution is the main influencing factor for drinking water quality in rural areas in Guangxi Zhuang Autonomous Region.