2022年西部某市农村生活饮用水水质综合评价

Comprehensive assessment of rural drinking water quality in a western China city,2022

目的评价西部某市农村生活饮用水水质卫生现状,并探讨其影响因素。方法收集西部某市2022年农村生活饮用水监测数据,应用水质综合指数法来评价分析该市农村饮用水的水质。结果西部某市2022年农村饮用水水质综合指数(water quality index,WQI)的M(P_(25),P_(75))为0.85(0.65,1.04),整体水质优良率为72.2%;地下水的WQI值及水质优良率均优于地表水,差异均有统计学意义(P<0.05);大规模供水水厂(日供水≥1000 m^(3))的WQI值及水质优良率均优于小规模水厂(日供水<1000 m^(3)),差异均有统计学意义(P<0.05);消毒水样的WQI值及水质优良率均优于未消毒水样,差异均有统计学意义(P<0.05)。影响该地区水质的主要不达标指标有8项,其中微生物指标1项、毒理学指标3项及一般化学指标4项。结论西部某市2022年农村生活饮用水总体水质良好。水源类型、供水规模和是否消毒等是影响该市农村饮用水水质及优良率的重要因素。

Objective To evaluate the status of rural drinking water quality and its influencing factors in a western China city.Methods The monitoring data of rural drinking water quality in a western China city in 2022 were collected,and the comprehensive water quality index(WQI)was used to evaluate and analyze the drinking water quality.Results The M(P_(25),P_(75))value of the com-prehensive water quality index of rural drinking water in the western China city in 2022 was 0.85(0.65,1.04),with an overall excel-lent and good rate for water quality of 72.2%.The WQI value and the excellent and good rate of water quality of groundwater were bet-ter than those of surface water,and the differences were statistically significant(P<0.05).The WQI value and the excellent and good rate of water quality of large-scale water supply plants(daily water supply≥1000 m^(3))were better than those of small-scale water sup-ply plants(daily water supply<1000 m^(3)),the differences were statistically significant(P<0.05);The WQI value and the excellent and good rate of water quality of disinfected water samples were better than those of undisinfected water samples,the differences were statistically significant(P<0.05).This region had eight main unqualified indicators,which included one microbiological indicator,three toxicological indicators,and four general chemical indicators.Conclusion The rural drinking water quality in the western China city in 2022 is generally good.The type of water sources,the scale of water supply,and whether it is disinfected are essential factors affecting the quality and excellent and good rate of rural drinking water in the city.