What was the highest concentration of Legionella found in the dormitory water samples?

The highest concentration of Legionella found in the dormitory water samples was 70 CFU/mL. This measurement indicates a significant presence of Legionella bacteria in the water system, which is particularly important for assessing potential risks to the health of individuals using that water.

Understanding colony-forming units (CFU) is crucial in this context, as it represents the number of viable bacteria that can reproduce in a suitable environment. A concentration of 70 CFU/mL indicates an environment where the bacteria can thrive, making it a point of concern for water safety management in plumbing systems. Recognizing this concentration helps in prioritizing intervention strategies, such as disinfection or system upgrades, to mitigate the risk of Legionella outbreaks, particularly in settings like dormitories where large numbers of people may be exposed to contaminated water.