Water Quality of Rural Drinking Water Safety Project in Sichuan 2008

Objective To understand the sanitary status of rural drinking water safety engineering in Sichuan province,provide the scientific basis data for the work of rural drinking water improvement.Methods According to Sanitary Surveillance Scheme for Rural Drinking Water Safety Engineering made by the National Campaign Committee,all the gathered water supply projects were investigated and detected water quality in high flow period and lower water period(according to Hygienic Standards of Drinking Water in China).Results In the 1 958 projects,the main water style of ground water was from reservoir,brook and river;the main water style of underground water was from deep wall.Finished detection samples occupied 86.49% in the rural drinking water safety project,2 290 water samples were measured up national standards,qualified rate was 33.81%,in which 34.48% was for finished water and 33.12% was for tap water.There was significant difference for finished water between high flow period and lower water period(χ2=9.06,P0.01),the water quality in lower water period was better than in high flow period.There is no difference for tap water in high flow and lower water period(χ2=2.57,P0.05).The qualified rate of microorganism index was low in 19 measured indexes,the qualified rates of other indexes were more than 90%,the qualified rates of disinfector residue were 23.43% and 34.26% in finished water and tap water.Conclusion The disposal technology of rural water drinking water safety engineering is not enough perfect,especially for not disinfected device.The qualified rate in water quality is relative low especially microbial index.The government should increase the construction quality of rural drinking water device in order to insure the sanitary safety of rural drinking water.