北京市大兴区农村生活饮用水卫生学调查

目的分析北京市大兴区农村生活饮用水水质卫生状况,为政府提供农村饮水卫生管理的基础资料。方法采用分层抽样方法,在大兴区区域内选取10个监测点,6年连续监测区内自备井水质情况。结果 2005—2010年共检测水样120份,合格80份,合格率为66.7%。枯水期、丰水期合格率差异无统计学意义（P〉0.05）。6年水质合格率差异无统计学意义（P〉0.05）。超标指标包括：总硬度、硝酸盐氮、细菌总数、总大肠菌群、浑浊度、溶解性总固体、粪大肠菌群、锰。西红门地区硝酸盐氮受降水影响,在枯水期、丰水期有差异性。结论大兴区地下水6年间水质较稳定,部分地区总硬度、硝酸盐氮超标问题较突出,水质亟待改善。

Hygienic Investigation on Rural Drinking Water in Daxing District of Beijing

Objective]To analyze the sanitary quality of rural drinking water in Daxing district of Beijing,provide the basic data for health management of rural water supply.Methods]With stratified sampling,10 monitoring points were collected in Daxing district,and water quality of self-equipped wells was monitored in six consecutive years.Results]From 2005 to 2010,120 water samples were tested,and 80 samples were qualified with the qualified rate of 66.7%.There was no significant difference in the qualified rate between dry season and wet season（P0.05）,and the difference in annual qualified rate among six years was not significant（P0.05）.The unqualified indexes included total hardness,nitrate nitrogen,total bacteria,total coliform group,turbidity,total dissolved solids,fecal coliform and manganese.By the influence of precipitation,there was significant difference in level of nitrate nitrogen in Xihongmen area between dry season and wet season.Conclusion]The groundwater quality of Daxing district is stable in six years.The unqualified status of total hardness and nitrate nitrogen are serious in some area,and the water quality need to be improved.