兰州市郊农村不同类型饮用水安全现状

Safety Status of Different Types of Rural Drinking Water in Lanzhou City

通过测定兰州市郊63个农村饮用水水体样本的感官性状及物理指标(pH值、电导率、浑浊度)、无机非金属指标(硝酸盐氮、亚硝酸盐氮、氨氮)和金属指标(Cu、Zn、Pb、Cd)等,结合国家饮用水卫生标准(GB5749-2006),采用方差分析和多重比较统计分析兰州市郊农村不同类型饮用水安全现状.结果表明:榆中县吕家岘村的窖水、永登县吕家嘴村的泉水及三庄村的窖水和皋兰县阴洼窑村的河水浑浊度严重超标,建议沉淀后再饮用;七里河区阿干镇煤矿区的河水、深井水和浅井水亚硝酸盐氮含量和氨氮含量严重超标,建议处理后再饮用或不要饮用;皋兰县阴洼窑村河水Cu的含量严重超标,榆中县连搭村的窖水、七里河区阿干镇和西固区大坪山村的浅井水Cd的含量严重超标,建议不要饮用;研究区其它类型饮用水所测指标符合国家饮用水卫生标准.

Safety status of different types of rural drinking water in Lanzhou City is analyzed by measuring the major sensory characteristics and physical indicators （pH, electrical conductivity （EC） and turbidity）, inorganic non-metallic indicators （NO3-N, NOz --N, NH4-N） and metal indicators （Cu, Zn, Pb and Cd） of 63 drinking water samples in rural areas of Lanzhou City, comparing with the background of Sanitary Standards for Drinking Water （GB5749-2006） and using analysis of variance and multiple comparison sta- tistical analysis. The results show： turbidity of cellar water in Lvjiaxian Village, Yuzhong County, spring water in Lvjiazui Village, cellar water in Sanzhuang Village, Yongdeng County and river water in Yinwayao Village and Gaolan County is seriously overweight, and precipitation is recommended before drinking. Contents of NO2-N and NH4-N in river water,deep well water and low well water in Agan Town, Qilihe District are seriously overweight,and it is recommended to deal with before drinking or not drinking. Contents of Cu in river water in Yinwayao Village,Gaolan County are seriously overweight;contents of Cd in cellar water in Lianda Village,Yuzhong County,and low well water in Agan Town,Qilihe District and Dapingshan Village,Xigu District are seriously overweight, and it is recommended to not drinking. The measured indicators of other types of drinking water in the study areas complied with the background of Sanitary Standards for Drinking Water.