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目的了解市政集中式供水、二次供水、末梢生活饮用水卫生状况,为保证居民饮水安全,合理制定市政饮用水安全发展规划和策略提供依据。方法按照《生活饮用水标准检验方法》(GB/T 5750-2006)、《生活饮用水卫生标准》(GB 5749-2006)和《二次供水卫生规范》(GB 17051-1997)的要求,笔者于2011年分季度对大石桥市的6家自来水厂、6家二次供水单位及随机抽取的40户居民生活饮用水进行采样、检测和评价。结果集中式供水水质总合格率为75.0%,主要超标指标是溶解性总固体、总硬度和菌落总数;二次供水水质总体合格率为58.3%,主要超标指标是菌落总数和总大肠菌群;末梢水水质总体合格率为70.6%,主要超标指标是菌落总数和总大肠菌群。结论本市居民生活饮用水卫生状况基本符合国家供水标准;水质微生物指标不容乐观,仍需改善。
Objective To understand the municipal centralized water supply, secondary water supply, peripheral drinking water health status, in order to ensure residents drinking water safety, rational development of municipal drinking water safety development planning and strategy to provide the basis. Methods According to the requirements of Standard Test Method for Domestic Drinking Water (GB / T 5750-2006), Sanitary Standard for Drinking Water (GB 5749-2006) and Sanitary Specification for Secondary Water Supply (GB 17051-1997), the author In the quarter of 2011, six waterworks, six secondary water supply units and 40 randomly selected residents drinking water in Dashiqiao City were sampled, tested and evaluated. Results The total qualified rate of centralized water quality was 75.0%. The main indicators of over-standard were total dissolved solids, total hardness and total number of colonies. The overall pass rate of secondary water supply was 58.3%. The main indicators of over-standard were total colony and total coliforms. The overall qualified rate of peripheral water quality was 70.6%, the main indicators exceeded the total number of colonies and total coliform bacteria. Conclusion The hygienic condition of drinking water of residents in this Municipality basically meets the national water supply standards; the indicators of water quality microorganisms can not be optimistic and still need improvement.