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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 understand the water quality and hygiene status of various water supply units in Tangshan City, Hebei Province. Methods The water quality testing results of various water supply units included in the national drinking water health monitoring network in Tangshan from 2012 to 2013 were statistically analyzed. Results Tangshan City, Hebei Province, municipal water supply, municipal water supply facilities, rural schools self-built facilities water samples pass rate of 89.2%, 60.9% and 46.8%, respectively, the difference was statistically significant (χ2 = 86.735, P = 0.000). Among the dry season and wet season, municipal centralized water supply had statistical significance (χ2 = 10.423, P = 0.001; χ2 rural school = 20.468, P = 0.000). The main indicators of water quality failure of the total coliforms, heat-resistant E. coli, the total number of bacteria, fluoride, nitrate, macroscopic, total hardness, disinfectant. Among them, the total number of colony, total coliforms and heat-resistant coliform bacteria in the self-built facilities in rural schools were 32.98%, 26.6% and 56.67%, respectively; the allowable passing rate of municipal water supply and self-built facilities water disinfectant Respectively, 89.5%, 58.62%. Conclusion The self-built water quality in rural schools in Tangshan City, Hebei Province is low, and the total number of colonies, total coliforms and heat-resistant coliform bacteria exceed the standard, and there is microbial contamination. The municipal water supply quality of self-built facilities is low, and the municipal centralized water supply The wet season water quality pass rate is lower than the dry season.