Wei sheng yan jiu = Journal of hygiene research
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Wei Sheng Yan Jiu
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An investigation on drinking water quality in rural areas of 180 counties in 26 provinces, municipalities and autonomous regions of China was carried out. The population surveyed was 89.39 million. 69.6% of which was supplied with ground water. Central water supply systems served 47.1% of population. ⋯ The bacteriological indices of drinking water exceeded the standard seriously. Organic pollution occurred extensively. Some regions supplied with water of high concentration of fluoride.