2007-2009年成都铁路辖区集中式供水水质监测

目的了解成都铁路辖区饮用水水质状况,为保证生活饮用水安全提供科学依据。方法采用现场采样方法,监测2007-2009年成都铁路辖区集中式供水水质,按《生活饮用水卫生标准检验方法》进行检测。结果 2007-2009年成都铁路辖区集中式供水出厂水水质合格率分别为98.39%,90.51%和95.16%,各年度合格率差异有统计学意义(χ2=100.5,P<0.05);水厂微生物指标、感官性状和一般化学指标、毒理学指标、消毒剂常规指标合格率分别为98.61%、96.61%、97.35%和95.83%;给水所合格率分别为93.94%、93.32%、97.25%和77.27%,除毒理学指标差异无统计学意义(χ2=0.009,P>0.05),其余指标差异均有统计学意义(χ2=9.71,P<0.05);枯水期和丰水期微生物指标、感官性状和一般化学指标、毒理学指标、消毒剂指标等4项指标除毒理学指标差异无统计学意义外,其余指标差异均有统计学意义(χ2=3.30,P<0.05)。结论 2007-2009年中2008年成都铁路辖区集中式出厂水合格率最低;规模较大的水厂出厂水合格率高于规模较小的给水所;枯水期微生物指标和消毒剂指标合格率高于丰水期,而感官性状和一般化学指标合格率则低于丰水期。

Water Quality of Centralized Water Supply in Areas Under Chengdu Railway Bureau,2007-2009

Objective To provide scientific evidence for guarantee the safety of daily-life drinking water by understanding the quality of drinking water in areas under Chengdu Railway Bureau.Methods The water quality of centralized water supply in areas under Chengdu Railway Bureau from 2007 to 2009 was monitored with on-site sampling method,and detected according to Method of Detection for Health Standard of Living Drinking Water.Results The qualified rate of centralized water supply in areas under Chengdu Railway Bureau were 98.39%,90.51% and 95.16% for 2007,2008 and 2009 respectively,with the difference of annual qualified rate was statistical significant(χ2=100.5,P<0.05).The qualified rate of water factory’s microorganism index,sensory properties and common chemist index,toxicology index and disinfectant conventional index were 98.61%,96.61%,97.35% and 95.83% respectively.The qualified rate of water supply were 93.94%,93.32%,97.25% and 77.27% respectively.The differences of all the indexes were statistical significant(χ2=0.009,P>0.05) except toxicology index(χ2=9.71,P<0.05).The differences between high water period and low water period in microorganism index,sensory properties and common chemist index,toxicology index and disinfectant conventional index were all statistical significant(χ2=3.30,P<0.05)but toxicology index.Conclusion From 2007 to 2009,the qualified rate of centralized water supply in areas under Chengdu Railway Bureau in 2008 is the lowest;the qualified rate of larger water factory is higher than that of smaller ones.The qualified rate of microorganism and disinfectant index in high water period is higher than that of low water period,while sensory properties and common chemist index is lower.