What should be done if testing shows a significant Legionella presence?

When testing reveals a significant presence of Legionella, it is crucial to act according to a control protocol. This approach is designed to effectively address and manage the risk associated with the bacteria, which can lead to Legionnaires' disease if not properly handled.

Control protocols typically include a range of strategies such as immediate remediation measures, adjustment of water temperatures, increased monitoring, and implementing maintenance practices aimed at reducing the presence of Legionella in the plumbing system. By following a systematic control protocol, the risk to human health can be minimized while ensuring that the water system is brought back into compliance with health and safety standards.

In contrast, ignoring the results could lead to severe health risks, while immediate closure of the system may not be necessary or practical and could disrupt services. Reducing water temperature, although a part of some control strategies, is typically one component within a broader protocol rather than a standalone solution. Therefore, adhering to an established control protocol is the most comprehensive and effective response when significant Legionella presence is detected.