2016-2018年盐边县饮用水水质定点监测结果分析

Sentinel Surveillance Results of Drinking Water in Yanbian County of Panzhihua City From 2016 to 2018

目的分析2016-2018年盐边县生活饮用水水质定点监测结果,为加强饮用水安全管理工作提供参考依据。方法按照GB/T 5750-2006《生活饮用水卫生标准》对2016-2018年盐边县饮用水定点监测结果进行分析。合格率的比较采用卡方检验。结果共检测生活饮用水224份,合格103份,合格率为45.98%。2016-2018年合格率分别为53.95%、32.89%和51.39%,不同年度间合格率差异有统计学意义(χ^2=8.03,P=0.02)。地下水与地表水水质合格率分别为25.00%和58.57%,其差异有统计学意义(χ^2=23.82,P=0.00)。全县监测点中有城区、桐子林镇、红格镇、和爱乡、惠民乡、渔门镇和箐河乡合格率达到50.00%及以上。不合格指标9项,主要为总大肠菌群、耐热大肠菌群、肉眼可见物、浑浊度和菌落总数。结论盐边县生活饮用水水质合格率仍然低,以微生物学指标超标为主。

Objective To analyze sentinel surveillance results of drinking water in Yanbian County in 2016 to 2018 so as to provide a basis for strengthening drinking water safety management and technical support. Methods Sentinel surveillance results of drinking water from 2016 to 2018 in Yanbian County were analyzed according to Standards for drinking water quality(GB/T 5750-2006).Results Among 224 samples examined,103 were qualified(45.98%). The qualified rates in 2016 to 2018 were 53.95%, 32.89% and 51.39%, respectively;differences in qualified rates in different years were statistically significant (χ^2=8.029, P=0.02). Groundwater and surface water qualified rate were 25.00% and 58.57%,respectively;the difference was statistically significant (χ^2=23.822,P=0.00). Among the sentinel surveillance sites, the conformity rates of drinking water was above 50.00% in the urban district, Tongzilin Town, Hongge Town, Heai Town, Huimin Town,Yumen Town and Jinghe River Town. Nine items failed to meet the standards, mainly including total coliform,thermotolerant coliforms,visible particles,turbidity and total number of colonies.Conclusion The drinking water quality conformity rate is still low in Yanbian County,with microbiological indicators as the main nonconforming items.