Résumé
Water treatment systems play an essential role in dialysis therapy. The control of bacteriologi-cal water quality is vital to ensure a better quality of hemodialysis patient's life. The current study assessed the microbiological quality of the hemodialysis water system of four hemodialysis centers located in major public health centers in Amman, Jordan (Hemodialysis centers A, B, C, and D). Their water samples were collected monthly from the dialysis machine's water inlet before and during the COVID-19 pandemic between 2018 and 2021. Total heterotrophic bacterial counts (TC), detection of Pseudomonas aeruginosa, and bacterial endotoxin (BE) concentrations were examined. According to international guidelines, most of the TC and BE results were within acceptable levels. However, some points were outside the limits, in addition to Pseudomonas aeruginosa being detected as well. These data indicated that the centers studied should revise the quality control management of their hemodialysis. This research emphasizes the importance of regular monitoring, main-tenance, and development of effective water treatment systems to avoid bacterial growth and the production of biofilms, even in pandemic situations. © 2023 Desalination Publications. All rights reserved.