目的 了解2017—2022年甘肃省嘉峪关市生活饮用水水质状况及变化趋势,为嘉峪关市的水质管理和民众饮水安全保障提供科学依据和参考。方法 收集2017—2022年嘉峪关市城区和3个乡镇1 732份水样,按照GB/T 5750—2006《生活饮用水标准检验方法》开展水质常规指标监测,依据GB 5749—2006《生活饮用水卫生标准》进行评价,合格率的比较采用χ²检验。结果 共采集1 732份水样,合格水样1 508份,合格率为87.10%。2017—2022年水样合格率分别为46.27%、79.52%、98.32%、100.00%、98.60%和89.40%,呈上升趋势(χ${ }_{趋势}^{2}$=328.828,P<0.001)。城市供水合格率为89.47%,农村供水合格率为72.08%,差异有统计学意义(χ²=53.938,P<0.001);枯水期和丰水期合格率分别为91.37%和90.04%,差异无统计学意义(χ²=0.515,P=0.470);出厂水合格率、末梢水合格率和二次供水合格率分别为74.23%、91.12%和78.02%,差异有统计学意义(χ²=40.823,P<0.001)。在生活饮用水水质39个检测项目中,不合格指标主要为硒、铝、锌。结论 嘉峪关市生活饮用水水质合格率总体呈上升趋势,但仍有部分指标不合格,需采取相关措施提升生活饮用水质量。

Objective To understand the status and changing trend of domestic drinking water quality in Jiayuguan City,Gansu Province from 2017 to 2022,in order to provide the scientific basis and reference for water quality management and safeguarding people's drinking water safety in Jiayuguan City. Methods 1 732 water samples were collected from urban areas and three townships of Jiayuguan City from 2017 to 2022,and the routine monitoring of water quality indicators was conducted with GB/T 5750-2006 Standard examination methods for drinking water.Evaluation was carried out according to GB 5749-2006 Standards for drinking water quality,and the pass rate was compared by chi-square test. Results A total of 1 732 water samples were taken and 1 508 were qualified,with a qualification rate of 87.10%.The qualified rates of water samples from 2017 to 2022 were 46.27%,79.52%,98.32%,100.00%,98.60%,and 89.40%,respectively,showing an upward trend (χ ${ }_{trend}^{2}$=328.828,P<0.001).The qualified rate of urban water supply was 89.47%,while the qualified rate of rural water supply was 72.08%,The difference between them was statistically significant (χ²=53.938,P<0.001).The passing rate in the dry and abundant water periods was 91.37% and 90.04%,respectively,with no statistically significant difference (χ²=0.515,P=0.470).The passing rate of the ex-factory water,the terminal water,and the secondary water supply were 74.23%,91.12%,and 78.02%,respectively,with a statistically significant difference (χ²=40.823,P<0.001).In the living drinking water quality of 39 test items,unqualified indicators were mainly selenium,aluminum,and zinc elements. Conclusion The drinking water quality qualification rate in Jiayuguan City is generally on the rise,but there are some indicators unqualified,and relevant measures need to be taken to improve the quality of drinking water.