2016年洛阳市城市饮用水水质卫生状况分析

Analysis of the hygienic status of urban drinking water in Luoyang

目的了解洛阳市城市饮用水的卫生状况,为加强饮用水卫生监督管理、保障饮水安全提供科学依据。方法分别于2016年枯水期和丰水期采集城市6区和9个县(市)城区的水样,市政供水丰水期出厂水进行水质指标全分析,其余水样进行水质常规指标和氨氮指标检测。结果共监测常规分析和氨氮水样208份,合格率为77.40%;主要不合格指标有11项,合格率低于99%的指标由低到高依次为菌落总数、总大肠菌群、消毒剂指标、硝酸盐氮和耐热大肠菌群、总硬度、溶解性总固体、浑浊度和硫酸盐;监测全分析水样3份,均为不合格,不合格指标六氯丁二烯均超过标准值3.58倍。结论洛阳市饮用水不合格指标主要是微生物、消毒剂、硝酸盐氮、一般化学指标和六氯丁二烯。

Objective To understand the hygienic status of drinking water in Luoyang, so as to provide scientific basis for strengthening the supervision and management of drinking water and for ensuring the safety of drinking water. Methods In 2016, the water samples were collected in the dry period and the rainy period in 6 districts of the city and 9 counties/cities/dis- tricts. In the rainy period, the total indexes in the finished water samples of municipal water supply were measured and the con- ventional indexes and ammonia nitrogen in the other water samples were measured. Results 208 water samples were analyzed for their conventional indexes and ammonia nitrogen, and the qualified rate was 77.40% ; there were 11 main unqualified inde- xes. The ascending order of qualified rates less than 99% were total number of colonies, total coliforms, disinfectant index, ni- trate nitrogen and thermotolerant coliforms, total hardness, total dissolved solids, turbidity and sulfate; 3 water samples were analyzed for their total indexes and they were all unqualified. The main unqualified index was hexachlorobutadiene and its detec- tion results were over 3.58 times of the standard value. Conclusion The main indexes of unqualified drinking water in Luoy- ang are microbe, disinfectant, nitrate nitrogen, general chemicals and hexachlorobutadiene.