论文部分内容阅读
目的分析2008-2011年某市太湖水源生活饮用水水质状况及变化趋势,为保障和改善居民饮用水卫生安全和卫生质量提供科学依据。方法依据《生活饮用水卫生标准》(GB 5749-2006)对2008-2011年某市太湖水源生活饮用水监测结果分析及评价。结果检测水样1 432份,合格1 331份,总合格率92.9%;年度合格率由2008年的80.5%提高到2011年的97.1%,差异有统计学意义(χ2=40.078,P<0.001);不合格指标中,菌落总数、浑浊度和铁超标项次数最多,为主要不安全水质指标;对不同季节菌落总数超标率比较,差异有统计学意义(χ2=10.215,P<0.017),其中第三季度最高(5.3%)。结论目前该市太湖水源生活饮用水水质基本符合GB 5749-2006的要求,少数管网水质存在微生物污染等安全隐患,今后工作中必须加强管网末梢水质的卫生监督管理。
Objective To analyze the status of drinking water quality and its changing trend of Taihu Lake water source in a city from 2008 to 2011 and provide a scientific basis for ensuring and improving the hygienic safety and hygiene quality of drinking water. Methods Based on “Sanitation Standard of Domestic Drinking Water” (GB 5749-2006), the result of monitoring drinking water in Taihu Lake in a city from 2008 to 2011 was analyzed and evaluated. Results A total of 1 432 water samples were tested and 1 331 were qualified, with a total pass rate of 92.9%. The annual pass rate increased from 80.5% in 2008 to 97.1% in 2011, with a significant difference (χ2 = 40.078, P <0.001) ; In the unqualified indicators, the total number of colonies, turbidity and iron exceed the maximum number of items, as the main unsafe water quality indicators; for different seasons the total number of exceed the standard rate, the difference was statistically significant (χ2 = 10.215, P <0.017), of which Highest third quarter (5.3%). Conclusion At present, the quality of drinking water in Taihu Lake water source basically meets the requirements of GB 5749-2006. There is a potential safety hazard such as microbial contamination in the water quality of a few pipelines. Health supervision and management over the water quality of the pipe network end must be strengthened in future work.