Public Health Wales said it has been investigating a 'higher than usual' number of cases of Legionnaires' disease in the Vale of Glamorgan over the past 10 months.
Legionnaires' disease is a lung infection that can be life-threatening. It cannot be passed from person to person but can be caught from inhaling water droplets containing bacteria.
It often begins with flu-like symptoms and can lead to pneumonia.
Steps that can be taken to reduce the risks:
- Regularly flushing through or removing unused taps and shower heads
- Draining water bowsers and garden hoses if not in use
- Using commercial screen washes in cars rather than just water or homemade solutions
- Running the shower for several minutes if you have been away from home for several weeks