枣庄市市中区2019年至2022年生活饮用水检测结果分析

Test Result Analysis of the Drinking Water in Shizhong District Zaozhuang City from 2019 to 2022

目的探讨枣庄市市中区2019年至2022年生活饮用水检测结果。方法选择2019年至2022年枣庄市市中区生活饮用水标本859份为对象,根据《生活饮用水标准检测方法》对收集标本中常见的微生物进行测定,并对测定结果参考有关标准判定。结果859份生活饮用水标本中检测合格802份,总体合格率为93.36%。微生物指标中菌落总数合格率为96.04%(微生物大肠菌落合格率最低,为95.11%);硝酸盐、亚硝酸盐、氨氮、硫酸盐、氯化物、溶解性总固体、砷、镉、铜、锌、汞、硒、铅检测合格率均为100.0%;2019年与2022年水样合格率差异有统计学意义(χ^(2)=7.781,P=0.005);出厂水样合格率、末梢水样合格率、水源水样合格率差异有统计学意义;即末梢水样合格率最低,出厂水样合格率最高;市级水厂合格率与镇级水厂合格率差异有统计学意义(χ^(2)=35.437,P=0.000),即市级水厂合格率高于镇级水厂。结论枣庄市市中区2019年至2022年生活饮用水卫生状况存在问题较多,且以微生物指标超标为主,相关部门应采取干预措施,强化饮水工程管理以时改善水质,保证居民安全饮水。

Objective To analyse the drinking water testing results in Shizhong district,Zaozhuang City from 2019 to 2022.Method 859 standard samples of drinking water in Shizhong District of Zaozhuang City from 2019 to 2022 were selected as the subjects.According to the“Standard Testing Method for Drinking Water”,common microorganisms in the collected samples were determined,and the determination results were judged based on relevant standards.Result Among the 859 samples of drinking water,802 were found to be qualified,with an overall qualification rate of 93.36%.The qualification rate of total bacterial count in microbial indicators was 96.04%(with the lowest qualification rate of microbial coliform colonies was 95.11%);The qualification rate for nitrate,nitrite,ammonia nitrogen,sulfate,chloride,soluble total solid,arsenic,cadmium,copper,zinc,mercury,selenium,and lead detection was 100.0%;There was a statistical difference in the qualified rate of water samples between 2019 and 2022(χ^(2)=7.781,P=0.005);There was statistical significance in the qualification rate of factory water samples,peripheral water samples,and source water samples;The qualification rate of peripheral water samples was the lowest,and the qualification rate of factory water samples was the highest;There was a statistical difference in the qualification rate between municipal water plants and town level water plants(χ^(2)=35.437,P=0.000),indicating that the qualification rate of municipal water plants was higher than that of township water plants.Conclusion There are many problems with the hygiene status of drinking water in Shizhong District of Zaozhuang City from 2019 to 2022,with microbiological indicators exceeding the standard.Relevant departments should take intervention measures,strengthen water engineering management,and improve water quality in a timely manner to ensure safe drinking water for residents.