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目的了解广州市白云区生活饮用水水质卫生状况,为改善饮用水水质提供依据。方法按照《生活饮用水标准检验方法》(GB/T 5750-2006)进行水样的采集和检测,按照(GB/T 5749-2006)《生活饮用水卫生标准》进行水样的评价。结果 2009—2012年共检测水样1 503份,合格1 107份,总合格率为73.65%。各年合格率依次为76.66%、75.15%、70.78%、70.90%,差异无统计学意义(χ2=4.844,P>0.05)。各类生活饮用水中合格率由高到低为末稍水(87.31%)、二次供水(77.20%)、深井水(57.67%)、出厂水(51.69%)、山泉水(41.67%)、水源水(31.96%),差异有统计学意义(χ2=219.3,P<0.01);不同检测项目中合格率由低到高依次为氨氮(67.48%)、pH值(80.34%)、菌落总数(84.30%)、锰(92.98%)、总大肠菌群(93.41%)、浑浊度(93.45%)、游离余氯(93.70%),其他检测项目合格率介于95%~100%之间。结论广州市白云区生活饮用水水质合格率偏低,超标项目主要为氨氮、pH值、锰、菌落总数、浑浊度、游离余氯等指标,今后需加强对饮用水的卫生监测,水源水的保护和治理是改善饮用水水质的关键。
Objective To understand the hygienic condition of drinking water in Baiyun District of Guangzhou City and provide basis for improving drinking water quality. Methods Water samples were collected and tested in accordance with Standard Test Method for Domestic Drinking Water (GB / T 5750-2006), and water samples were evaluated according to (GB / T 5749-2006) Standard for Drinking Water Quality. Results A total of 1 503 samples of water samples were collected from 2009 to 2012, with a total of 1 107 samples. The total pass rate was 73.65%. The passing rates in each year were 76.66%, 75.15%, 70.78% and 70.90%, respectively, with no significant difference (χ2 = 4.844, P> 0.05). The qualified rate of drinking water in all kinds of drinking water was 87.31%, secondary water (77.20%), deep well water (57.67%), manufactured water (51.69%), spring water (41.67%), Water source water (31.96%), the difference was statistically significant (χ2 = 219.3, P <0.01). The qualified rates of ammonia nitrogen (67.48%), pH (80.34% 84.30%), manganese (92.98%), total coliforms (93.41%), turbidity (93.45%) and free residual chlorine (93.70%). The pass rates of other test items ranged from 95% to 100%. Conclusion The passing rate of drinking water quality in Baiyun District of Guangzhou City is low. The main items that exceed the standard are ammonia nitrogen, pH value, manganese, the total number of colonies, turbidity and free residual chlorine. In the future, it is necessary to strengthen the sanitary monitoring of drinking water, Protection and governance are key to improving the quality of drinking water.