1. Analysis on the exposure level and geographic distribution trend of toxicological indicators in rural drinking water, Shandong Province, in 2015
Feng SHI ; Shibo LYU ; Fanling KONG ; Xuting YANG ; Jingyang ZHOU
Chinese Journal of Preventive Medicine 2017;51(9):843-847
Objective:
To analyze the exposure level and the geographical distribution trend of toxicological indicators of rural drinking water in Shandong Province.
Methods:
The drawing method was used to randomly select no less than 60% villages and towns from 137 counties (cities, districts) of 17 cities in Shandong Province in 2015, and then 1-3 rural centralized water supply units were selected according to the circumstance of rural centralized water supply units in each village and town. In total, 735 villages and towns, 1 473 rural centralized water supply units were selected, and 1 473 water samples were collected. The water treatment process, water supply population and other circumstances of the rural centralized water supply units were investigated, the water quality was monitored, the content of toxicological indicators of drinking water in different areas was compared, and the trend surface isogram of excessive toxicological indicators was drawn.
Results:
The qualified rate of toxicological indicators in 1 473 water samples was 83.64% (