Staying safe from legionella.
What you need to know
Legionella is a type of bacteria that can cause Legionnaires’ disease, a potentially serious form of pneumonia. It grows naturally in water, particularly in warm, stagnant conditions, and can be found in systems such as hot and cold water tanks, showers, taps, and garden ponds. While the risk is low for most people, it’s important to take precautions to protect yourself, your family, and vulnerable members of the community.
What is Legionella?
Legionella bacteria can multiply in water systems when temperatures are between 20°C and 45°C. Infection occurs when contaminated water droplets are inhaled, for example through mist from showers, hot tubs, or air conditioning systems. Symptoms of Legionnaires’ disease include cough, shortness of breath, high temperature, muscle aches, and headaches. People over 50, smokers, and those with weakened immune systems are at higher risk.
How to Prevent Legionella at Home
You can reduce the risk of Legionella in your home by following these simple steps:
1. Maintain your hot and cold water systems
- Keep hot water in your tank at 60°C or above and hot taps at 50°C or above.
- Cold water should be stored below 20°C.
- Regularly clean and descale shower heads and taps.
2. Flush unused taps and showers
- If a tap or shower hasn’t been used for a week or more, run it for several minutes to flush out stagnant water.
3. Clean and maintain water-using equipment
- Regularly clean humidifiers, fountains, and garden water features.
- Follow the manufacturer’s instructions for hot tubs, ensuring correct chemical levels and regular water replacement.
4. Seek professional help for complex systems
- Larger water systems, such as in apartment blocks or public buildings, may require professional risk assessments and maintenance.
When to seek medical advice
If you experience flu-like symptoms, particularly a persistent cough, fever, or difficulty breathing, contact your doctor and mention possible exposure to contaminated water. Early diagnosis and treatment are important.
Further guidance
For more information on Legionella and how to manage water safely in your home, you can visit:
By following these precautions, residents can significantly reduce the risk of Legionella and keep their homes safe.