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

Ninety-three samples of source water, used to produce bottled drinking water at bottled producers in Khanh Hoa province 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%) did not meet the microbiological requirements according QCVN 01-1:2018/BYT. In which, the percentage unsatisfactory well (42.9%, 6/14) was higher than that of tap (16.5%, 13/79). The proportion drinking water facilities not meet Cam Lam district (83.3%) those Ranh (33.3%), Dien (30%), Ninh Hoa (13.6%), Nha Trang (8%), and Van (7.7%). Unsatisfactory criteria included coliform (16.1%), P. aeruginosa (15.1%), E. coli (1.1%). addition, there were 8/93 (8.6%) with HPC recommended limit (500 CFU/mL) of the Environmental Protection Agency (EPA). means HPC, P. aeruginosa 4,2 × 102, 6,2 101, 1,1 102 CFU/100 mL, respectively. Contaminated is one risks contamination finished bottled water. Therefore, need to maintain good infection control minimize risk microbial from source finished