Construction and renovation events can pose several scenarios that can have significant impact on building water systems. These events can increase the potential for growth of Legionella, and ultimately increase the risk of Legionnaires’ disease to building occupants.
Examples of construction events that can negatively impact water quality by causing spikes in waterborne pathogens such Legionella include: Excavation, water main breaks, water pressure changes, brown water events, construction material changes, stagnation and ineffective commissioning.