2007～2010年墨江县生活饮用水水质监测资料分析

Analysis on Drinking Water Quality Surveillance Data in Mojiang County,2007-2010

[目的]了解墨江县生活饮用水水质卫生状况,为改水工作和相关部门的决策提供科学依据。[方法]对墨江县2007～2010年各类生活用水监测资料进行分析。[结果]2007～2010年合计检测594份水样,合格的321份,合格率为54.04%。水样合格率,2007～2010年分别为46.40%、49.62%、50.00%、75.68%(P<0.01)。感官指标、化学指标、毒理学指标、微生物学指标合格率分别为69.36%、87.21%、99.49%和59.43%(P>0.05)。集中式供水、二次供水、分散式供水水样合格率分别为75.48%、45.56%、32.32%(P<0.01)。检测不合格率,细菌总数、浑浊度、肉眼可见物、总大肠菌群、铁、氨氮、锰、亚硝酸盐氮、铬(6价)、耗氧量、溶解性总固体、总硬度分别为28.78%、17.85%、12.79%、11.78%、6.23%、2.53%、2.02%、1.18%、0.51%、0.51%、0.17%、0.17%。[结论]墨江县生活饮用水水质合格率较低,分散式供水污染严重。

[Objective]To understand the quality and hygienic status of drinking water in Mojiang county so as to provide basis for decision-making of the water reform and related sectors.[Methods]Analysis was made on the surveillance data of water in Mojiang county,2007-2010.[Results]Totally 594 water samples were examined from 2007 to 2010,321 qualified,with qualified rate of 54.04%.The qualified rates of water sample from 2007 to 2010 were 46.40%,49.62%,50.00%,and 75.68%（P0.01） respectively.And the qualified rates of sensory,chemistry,toxicology and microbiology indexes were 69.36%,87.21%,99.49% and 59.43% respectively（P0.05）.The qualified rates of centralized water supply,secondary water supplied and decentralized water supply were 75.48%,45.56%,and 32.32% respectively（P0.01）.The defective rate of total bacteria,the opacity,visible objects,total coliform,iron,ammonia nitrogen,manganese,nitrite nitrogen,chromium（VI）,oxygen consumption,the dissolved solids,and total hardness were 28.78%,17.85%,12.79%,11.78%,6.23%,2.53%,2.02%,1.18%,0.51%,0.51%,0.17%,and 0.17% respectively.[Conclusion]The qualified rate of drinking water in Mojiang county is low,and the decentralize supplied water is polluted seriously.