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目的寻找供水单位水源水污染原因。方法对供水单位的水源地进行现场调查,并采集水源水、出厂水和管网末梢水进行水质常规指标检测,按照《生活饮用水卫生标准》GB5749-2006评价。结果水源水合格率为33.33%,主要超标项目是硝酸盐氮和总硬度;出厂水和末梢水硝酸盐氮均超标。结论硝酸盐氮和总硬度是供水单位水源水污染的主要因素,长期饮用影响居民身体健康。
Objective To find out the causes of water pollution in water supply units. Methods The water sources of the water supply units were investigated on site, and water source water, factory water and the peripheral water of the pipe network were collected for routine testing of water quality according to the standard of GB5749-2006 of “Sanitary Standard for Domestic Drinking Water”. Results The qualified rate of water source water was 33.33%. The main over-standard items were nitrate nitrogen and total hardness. Nitrate nitrogen in the ex-factory water and the peripheral water exceeded the standard. Conclusion Nitrate nitrogen and total hardness are the main factors of water source water pollution in water supply units. Long-term drinking affects the health of residents.