The status of microbiological contamination of water using to produce bottled drinking water in Khanh Hoa province in 2022

Ngoc Duyen Nguyen Thi, Phong Le Quoc, Thuy Tran Thi, Van Khanh Dao Thi, Hoai Trinh Phan Thi, Hung Do Thai
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Abstract

Ninety-three samples of source water, used to produce bottled drinking water at bottled drinking water producers in Khanh Hoa province in 2022, were examined for microbiological criteria such as coliform, Escherichia coli, Pseudomonas aeruginosa, and HPC (Heterotrophic Plate Count). Results indicated that 19/93 (20.4%) of samples did not meet the microbiological requirements according to QCVN 01-1:2018/BYT. In which, the percentage of microbiological unsatisfactory well water (42.9%, 6/14) was higher than that of tap water (16.5%, 13/79). The proportion of source water samples of bottled drinking water facilities that did not meet the microbiological requirements in Cam Lam district (83.3%) was higher than those of Cam Ranh (33.3%), Dien Khanh (30%), Ninh Hoa (13.6%), Nha Trang (8%), and Van Ninh (7.7%). Unsatisfactory microbiological criteria included coliform (16.1%), P. aeruginosa (15.1%), and E. coli (1.1%). In addition, there were 8/93 (8.6%) samples with HPC higher than the recommended limit (500 CFU/mL) of the Environmental Protection Agency (EPA). The means of HPC, coliform, and P. aeruginosa were 4,2 × 102, 6,2 × 101, and 1,1 × 102 CFU/100 mL, respectively. Contaminated source water is one of the risks of microbiological contamination in finished bottled drinking water. Therefore, bottled drinking water producers in Khanh Hoa need to maintain good infection control and minimize the risk of microbial contamination from source water to finished bottled drinking water.  
2022年庆化省瓶装饮用水生产用水的微生物污染状况
对2022年庆化省瓶装饮用水生产商用于生产瓶装饮用水的93个水源水样本进行了微生物标准检查,如大肠菌群、大肠杆菌、铜绿假单胞菌和HPC(异养平板计数)。结果显示,93份样品中有19份(20.4%)不符合QCVN 01-1:2018/BYT微生物学要求。其中,井水微生物不合格率(42.9%,6/14)高于自来水(16.5%,13/79)。金林区瓶装饮用水设施源水样微生物含量不符合要求的比例为83.3%,高于金兰(33.3%)、奠庆(30%)、宁化(13.6%)、芽庄(8%)和文宁(7.7%)。不满意的微生物标准包括大肠菌群(16.1%)、铜绿假单胞菌(15.1%)和大肠杆菌(1.1%)。此外,有8/93份(8.6%)样品的HPC含量高于美国环保署(EPA)建议限量(500 CFU/mL)。HPC、大肠菌群和铜绿假单胞菌的平均值分别为4、2 × 102、6、2 × 101和1、1 × 102 CFU/100 mL。水源污染是瓶装饮用水成品中微生物污染的风险之一。因此,庆化的瓶装饮用水生产商需要保持良好的感染控制,并尽量减少从源水到成品瓶装饮用水的微生物污染风险。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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