2019年—2021年巫山县农村集中式供水检测结果分析

Detection results and analysis of rural centralized water supply in Wushan County from 2019 to 2021

目的 了解三峡库区巫山县2019年—2021年农村集中式供水水质现状和变化趋势,为保障饮水安全和加强管理提供措施对策。方法 按工作计划要求,每年丰水期和枯水期各监测1次,依据《生活饮用水标准检测方法》(GB/T 5750—2006)对常规水质指标进行检验,依据《生活饮用水卫生标准》(GB 5749—2006)进行评价分析。结果 共检测水样458份,合格184份,合格率为40.17%。不同年度合格率分别为27.63%、43.51%、49.34%,呈上升趋势,差异有统计学意义(P<0.05)。出厂水水样合格率(48.13%)高于末梢水(34.69%),差异有统计学意义(P<0.05)。4类主要指标中,微生物指标合格率(50.87%)最低。结论 2019年—2021年巫山县农村饮用水总体合格率偏低,但逐年不断上升,应加强乡镇集中式供水工程运行管理,规范科学消毒。

Objective This paper aims to understand the current situation and change trend of rural centralized water supply quality in Wushan County of the Three Gorges Reservoir Region from 2019 to 2021, so as to provide measures and countermeasures for ensuring drinking water safety and strengthening management. Methods According to the work plan, water quality is monitored once a year in wet season and dry season respectively. The routine water quality indexes were inspected according to the Standard Test Method for Drinking Water(GB/T 5750—2006) and evaluated and analyzed according to the Sanitary Standard for Drinking Water(GB 5749—2006). Results A total of 458 water samples were detected, 184 samples were qualified, with the qualified rate of 40.17%. The qualified rates in different years were 27.63%, 43.51% and 49.34%, respectively, showing an upward trend, and the differences were statistically significant(P<0.05). The qualified rate of finished water(48.13%) was higher than that of tap water(34.69%), and the difference was statistically significant(P<0.05). Among the four main indicators, the qualified rate of microbial indicators(50.87%) was the lowest. Conclusion The overall qualified rate of rural drinking water in Wushan County from 2019 to 2021 is low, but it is increasing every year. It is necessary to strengthen the operation and management of centralized water supply projects in townships and standardize scientific disinfection.