目的了解肇庆市二次供水设施卫生管理情况和水质卫生状况,及时发现饮用水安全隐患,为有针对性地采取措施保障饮用水卫生安全提供科学依据。方法采用现场检查、问卷调查和抽样检测相结合的方法对肇庆市135个二次供水单位进行调查。结果二次供水设施卫生管理状况总体较好,但部分单位的供水设施仍存安全隐患。二次供水水质合格率为82.22%,低于市政供水的合格率(98.52%),差异有统计学意义(χ2=20.599,P<0.01)。两种不同材质(不锈钢和水泥混凝土)设施的水样检测合格率差异无统计学意义(χ2=0.001,P>0.05)。二次供水耗氧量平均值比市政供水的高(u=16.43,P<0.05)。二次供水菌落总数平均值比市政供水的高(u=16.17,P<0.01)。结论肇庆市二次供水存在安全隐患,应强化监督管理,提高卫生质量,保障饮用水安全。 Objective To understand the sanitary management of secondary water supply facilities and the sanitary status of water in Zhaoqing and find out the hidden dangers of drinking water in time so as to provide a scientific basis for taking targeted measures to ensure the hygiene and safety of drinking water. Methods A total of 135 secondary water supply units in Zhaoqing City were surveyed by on - the - spot inspection, questionnaire survey and sampling inspection. Results The health management of secondary water supply facilities was generally good, but some units still had potential safety hazards. The secondary water quality qualified rate was 82.22%, lower than the municipal water supply pass rate (98.52%), the difference was statistically significant (χ2 = 20.599, P <0.01). There was no significant difference in the passing rate of water samples between two different materials (stainless steel and cement concrete) (χ2 = 0.001, P> 0.05). The average oxygen consumption of secondary water supply was higher than that of municipal water supply (u = 16.43, P <0.05). The average number of secondary water supply colonies than the municipal water supply (u = 16.17, P <0.01). Conclusion There are potential safety problems in the secondary water supply in Zhaoqing City. Supervision and management should be strengthened to improve the hygiene quality and ensure the safety of drinking water.