2011年肇庆市管道直饮水的卫生现状调查

目的了解2011年肇庆市管道直饮水卫生状况,为制定提高肇庆市直饮水卫生质量的措施提供科学依据。方法采用随机抽样的方法,监测120份市政自来水与管道直饮水配对样本。结果肇庆市120份市政自来水水样与管道直饮水水样的检测项目中pH值(pH=6.63)、总硬度(38 mg/L)和细菌总数(18 CFU/ml)的差异有统计学意义(P0.01),直饮水的pH值、总硬度明显低于市政自来水,但直饮水细菌总数的超标率明显比自来水高,其他检测指标均无明显的变化(P0.05)。结论肇庆市管道直饮水系统的水质有变化,其中pH值、总硬度降低,细菌总数超标,二次污染现象显著。随着管道直饮水的普及提示有关部门必须规范及调整饮用净水水质卫生标准,不断加强管道直饮水监测卫生管理工作,防止二次污染,以进一步提高管道直饮水的卫生质量。

Investigation on sanitary status of piping drinking water in Zhaoqing City in 2011

Objective]To know about sanitary status of Zhaoqing＇s piping drinking water in 2011,and provide scientific evidence for improving sanitary status of Zhaoqing＇s direct drinking water.Methods]Random sampling method was adopted to test 120 paired samples of tap water and piping drinking water.Results] The difference of pH value（6.63）,hardness（38 mg/L）,total bacterial count（18 CFU/ml） between 120 paired samples were significant（P0.01）.The direct drinking water＇s pH,hardness were much lower than those of tap water.But total bacterial count of direct drinking water was much more than tap water.There were no obvious changes of other detection indexes（P0.05）.Conclusion]It shows direct drinking water quality is changed in Zhaoqing City,pH value and hardness decreasing,total bacterial count over standard,serious secondary pollution.With piping direct drinking water to be popularized,the government should revise sanitary status of drinking water,keeping on strengthening the sanitary management of piping drinking water,preventing secondary pollution,so as to improve the sanitary quality of piping drinking water.