Legionella is a type of bacteria that can grow in water systems and cause Legionnaires’ disease. It is contracted by inhaling small droplets of water (aerosols) that contain the bacteria not by drinking water.

Why are empty properties at risk?
When a home is left unoccupied, water is still in pipes, tanks, and appliances. This creates ideal conditions for Legionella to grow, especially if:

• Water temperatures are between 20°C and 45°C
• There is little or no water movement
• There is scale or rust in the system

Legal Responsibilities

Under UK law, landlords must:

• Assess the risk of Legionella in their homes
• Take steps to control the risk, especially in communal areas
• Inform residents about any risks and how to reduce them

In an occupied building where taps and showers are regularly used; there is very little risk of water stagnating in the pipes and therefore legionella bacteria has little chance to grow.

What Can Residents Do to Stay Safe?

If you are returning after a long absence (more than 2 weeks):
1. Run all taps and showers for at least 2 minutes – with the shower head as low as possible
2. Flush toilets with the lid down
3. Clean showerheads and taps regularly
4. Report any issues with water temperature or change of colour to Cornerstone

Who Is Most at Risk?
People at higher risk of Legionnaires’ disease include:

• Older adults (especially over 50)
• Smokers and heavy drinkers
• People with chronic respiratory or kidney conditions
• Those with weakened immune systems