All water systems have the potential to pose a risk to your health when naturally occurring legionella bacteria multiply to dangerous levels. This can result in illnesses and even death https://en.wikipedia.org/wiki/Legionella
We take precautions to minimise this risk at the properties we manage, however you also have a part to play in ensuring your own safety. Legionella can multiply to dangerous levels when water rests at moderate temperatures. The key ways to minimising risk are to ensure that:
hot water stays hot
cold water stays cold
water is circulated