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目的通过分析2012-2013年市政供水出厂水水质状况,了解呼和浩特市饮用水安全情况。方法我中心分别于2012年和2013年的枯水期、丰水期对12个市政水厂的出厂水水样按照GB/T 5750-2006《生活饮用水标准检验方法》~[1]进行采集和检验,检验结果按照GB 5749-2006《生活饮用水卫生标准》~[2]进行评价。结果 2012-2013年市政供水出厂水的合格率为87.2%(34/39)。2012年合格率为87.5%(21/24),2013年合格率为86.7%(13/15),差异无统计学意义(P>0.05)。10家公用水厂的合格率为97.1%(33/34),2家自建水厂的合格率为20%(1/5),差异有统计学意义(P<0.05)。在检测的95项指标中,不合格项分别为浑浊度、肉眼可见物、氨氮、亚硝酸盐氮和二氧化氯。结论呼和浩特市市政供水出厂水水质良好,2012年和2013年出厂水水质无明显差异,公用水厂的水质优于自建水厂。
Objective To understand the safety of drinking water in Hohhot by analyzing the water quality of municipal water supply from 2012 to 2013. Methods The water samples of 12 municipal waterworks were collected and tested in accordance with GB / T 5750-2006 Standard Test Method for Domestic Drinking Water [1] during the dry season and the wet season in 2012 and 2013, respectively. , Test results in accordance with GB 5749-2006 “drinking water health standards” ~ [2] for evaluation. Results The qualified rate of municipal water supply from 2012 to 2013 was 87.2% (34/39). The passing rate in 2012 was 87.5% (21/24), and the passing rate in 2013 was 86.7% (13/15), with no significant difference (P> 0.05). The pass rate of 10 public water plants was 97.1% (33/34), and the pass rate of 2 self-built water plants was 20% (1/5), the difference was statistically significant (P <0.05). Among the 95 indicators tested, the unqualified items were turbidity, macroscopic matter, ammonia nitrogen, nitrite nitrogen and chlorine dioxide. Conclusion The water quality of the municipal water supply in Hohhot is good. There is no obvious difference between the water quality of the factory water supply in 2012 and 2013, and the water quality of the public waterworks is better than that of the self-built waterworks.