云南省华宁县生活饮用水安全分析

Safety Analysis of Drinking Water in Huaning County of Yunnan Province

目的调查和分析云南省华宁县生活饮用水水质动态及安全状况,为政府决策提供依据。方法对2005—2009年全县生活饮用水监测结果进行分析,对饮用水的安全问题进行现状调查、统计与评估。结果华宁县集中供水水质明显好于农村饮用水;其感观和一般指标(浑浊度、游离余氯、肉眼可见物、氨氮)、微生物指标(细菌总数、大肠菌群)、金属指标(铁、锰)合格率间差异具有统计学意义;农村枯水期与丰水期水质只有浑浊度和氨氮合格率差异有统计学意义。结论加强水源防护、监测、管理是保证饮水安全的主要措施;农村饮水不安全的多因素应受到高度重视。

[Objective]To investigate and analyze the water quality dynamic change and safety situation of drinking water in Huaning county of Yunnan province,provide the evidence for government decision-making.[Methods]The monitoring results of drinking water in this county from 2005 to 2009 were analyzed,and the present situation investigation,analysis and evaluation about the safety problems of drinking water were performed.[Results]The water quality of central water supply was obviously better than that of rural drinking water,and there were significant differences in the qualified rate of sense and general index （turbidity,free residual chlorine,visible to naked eye and ammonia nitrogen）,microbiological index （total bacterial count and coliform bacteria） and metallic index （iron and manganese） between central water supply and rural drinking water.There were significant differences in the qualified rate of turbidity and ammonia nitrogen between dry and wet season water quality in rural areas.[Conclusion]The main measures for ensuring drinking water safety are improvement of protection,monitoring and management of water source.Much attention should be paid to various unsafe factors of drinking water in rural areas.