论文部分内容阅读
目的了解2011—2015年蒙自市农村集中式供水的卫生现状,为政府及相关部门对农村饮用水的建设与管理提供科学依据。方法对蒙自市农村集中式供水工程的情况进行现场调查,收集近5年的水质检测结果进行分析。结果 384份农村集中式供水水样合格率仅为50.78%,主要的不合格项目是大肠埃希菌、耐热大肠菌群、色度、肉眼可见物、总大肠菌群、浑浊度、菌落总数、游离余氯。枯水期与丰水期水质合格率差异有统计学意义(χ~2=14.26,P<0.01),出厂水与末梢水水质合格率差异无统计学意义(χ~2=2.34,P>0.05)。以地下水为水源的水质合格率高于地表水(χ~2=61.09,P<0.01)。结论蒙自市农村集中式供水工程水处理设施不完善和水质未消毒是导致水质合格率低的主要原因,应加强对农村饮水卫生技术指导和饮水消毒工作。
Objective To understand the health status of centralized water supply in rural areas of Mengzi City from 2011 to 2015 and to provide a scientific basis for the construction and management of rural drinking water by the government and relevant departments. Methods On-site investigation of the rural centralized water supply project in Mengzi City collected the water quality test results in the past five years for analysis. Results The qualified rate of 384 rural centralized water samples was only 50.78%. The main unqualified items were Escherichia coli, heat-resistant coliform bacteria, chroma, macroscopic matter, total coliforms, turbidity, total number of colonies Free chlorine. The qualified rate of water quality in dry season and wet season was significantly different (χ ~ 2 = 14.26, P <0.01). There was no significant difference in the passing rate of water quality between the factory water and the terminal water (χ ~ 2 = 2.34, P> 0.05). The passing rate of groundwater as water source was higher than that of surface water (χ ~ 2 = 61.09, P <0.01). Conclusion The water treatment facilities in rural centralized water supply project in Mengzi City are not perfect and the water quality is not disinfected, which is the main reason leading to low pass rate of water quality. Rural sanitary drinking water technical guidance and drinking water disinfection should be strengthened.