Drinking water quality analysis of provide for oneself water supply in rural schools, Guangxi from 2007 to 2008.

Objective To know the current situation of drinking water quality and the influencing factors of provided for oneself water supply in rural schools in Guangxi.Methods According to the randomly proportionate stratification (economic,geography and topography etc.),43 and 50 counties were selected in 2007 and 2008 and the monitoring sites from 3 rural schools with provided for oneself water supply facility were taken out based on the proportion of water sources and technical patterns coverage in each county.The survey on water supply technical patterns,water sources and their coverage was conducted.One hundred and thirty,one hundred and fifty-three monitoring sites in rain season (July or August) and dry season (March or November) were monitored separately in 2007 and 2008.The monitoring results of drinking water were assessed according to Sanitary Standards for Drinking Water Quality (GB5749-2006).Results The groundwater was main drinking water source,which were 84.03% and 90.75% in 2007 and 2008.Most of water supply had not any water treatment,which was 75.86% in 2007 and 64.22% in 2008.The qualified rate in rain season (18.02%) was significant lower than dry season (31.80%) (P0.01).As for water quality monitoring,the qualified rates of aesthetic and chemical indexes were ranged from 90.00% to 100%,and the rates of microbial indexes were lower,for total count of bacteria,they were 66.92% to 82.35%,and they were 28.46% to 43.79% for total coliform.Conclusion The qualified rate of drinking water of provided for oneself water supply is lower in rural schools in Guangxi for microbial contamination.