2012-2013年河北省唐山市饮用水卫生监测网点供水单位水质检测

Quality Monitoring of Water Supply Units in Tangshan,Hebei Province,2012-2013

目的了解河北省唐山市各类供水单位的水质卫生状况。方法对唐山市2012-2013年纳入国家级饮用水卫生监测网的各类供水单位的水质检测结果进行统计分析。结果河北省唐山市市政集中供水、市自建设施供水、农村学校内自建设施供水水样合格率依次为89.2%、60.9%和46.8%,3者差异有统计学意义(χ2=86.735,P=0.000);其中枯水期与丰水期比较,市政集中供水、农村学校内自建设施供水差异有统计意义(χ2市政=10.423,P=0.001;χ2农村学校=20.468,P=0.000)。水质不合格指标主要为总大肠菌群、耐热大肠杆菌、细菌总数、氟化物、硝酸盐、肉眼可见物、总硬度、消毒剂。其中农村学校内自建设施供水中菌落总数、总大肠菌群、耐热大肠菌群超标率分别为32.98%、26.6%和56.67%;市政集中供水、市自建设施供水消毒剂余量合格率分别为89.5%、58.62%。结论河北省唐山市农村学校内自建设施供水水质合格率低,菌落总数、总大肠菌群、耐热大肠菌群超标,存在微生物污染;市自建设施供水水质消毒合格率低;市政集中供水丰水期水质合格率低于枯水期。

Objective To investigate the water quality in supply units in Tangshan city,Hebei province. Methods During 2012-2013 in Tangshan city,the water samples were collected from national drinking water monitoring network and were statistically analyzed. Results The qualified rate of drinking water in Tangshan municipal centralized water supply,municipal self-constructed facility water supply and rural school self-constructed facility was respectively 89. 2%,60. 9% and 46. 8%,with statistical difference（ χ2= 86. 74,P 0. 01）. The difference between dry season and wet season was statistically significant in municipal central water supply（ χ2= 10. 42; P0. 01） and rural school self-constructed facility（ χ2= 20. 47,P0. 01）. The unqualified indexes included total coliform group,thermotolerant coliform,total bacterial count,fluoride,nitrate,visible,total hardness and sanitizer. The over standard rate of aerobic bacterial count, total coliform group,thermotoletant coliform bacteria was respectively32. 98%,26. 6% and 56. 67%. The qualified rate of remain of sanitizer in centralized water supply and self-constructed facility was respectively 89. 5% and 58. 62%. Conclusion The qualified rate of water in rural school self-constructed facility is low and the aerobic bacterial count,total coliform group,thermotoletant coliform bacteria are all exceeded the standards and additionally,the microbial contamination exists. The disinfection rate of water in municipal self-constructed facility is relatively low and the qualified rate of water fluctuates with seasons.