What is Legionella?

Legionella is a bacteria which can cause a disease called Legionnaires Disease. It is caused by the inhalation of small droplets of water suspended in the air from contaminated sources containing the bacteria.

Where is Legionella found?

Legionella bacteria can be found in all hot and cold-water systems in residential properties where there is potential for growth. The main risk areas is when the bacteria can multiply and increase to dangerous levels. The bacteria can spread through spray from showers and taps, dishwashers and washing machine pipes.

Legionella bacteria will grow rapidly if given optimum growth conditions. Incorrect water temperatures is a key risk and the bacteria will multiply in stagnant water between 20°C and 45°C. Addtionally, if a supply of nutrients are present such as scale, rust, algae or sludge.

Why is Legionnaires Disease a problem?

Legionnaires diseases is a potentially fatal form of pneumonia and everyone is susceptible to infection. However, the elderly, heavy smokers and drinkers or those with underlying health conditions are most at risk. Symptoms include high temperature, fever or chills, tiredness, headache, dry cough and muscle pain.

Legionella Risk Assesments

The Health and Safety Executive (HSE) states that landlords have a legal duty to assess and control the risk associated with Legionella. The HSE have also warned about potential legionella outbreaks in rented properties which have had a reduced occupancy during COVID-19 lockdowns. Furthermore, the Scottish Government have made a Legionella Risk Assessment a requirement before renting a property.

Legionnaires Disease can pose a serious risk. Legionella Risk Assessments can help minimise and control these risks while ensuring the optimum health and safety of occupants.

Futher Resources

For more information we have put together a free downloadable Legionella Tenant Guide on our website to inform your tenants about Legionnaire’s Disease.

Adam Al-khateb 08/03/2021