Swiss public pools shut after dangerous bacteria levels detected in water

Public swimming pools in Fribourg and Geneva have failed hygiene tests after high levels of harmful bacteria were detected in their water. The findings raise concerns about water safety, particularly for those with weakened immune systems. No illnesses have been reported so far, but officials are urging stricter maintenance checks. Tests revealed excessive Legionella bacteria in two public pools. Geneva's Bains de Cressy pool recorded 300 colonies per litre—three times the legal limit. Urbanspa in Fribourg had 500 colonies per litre, alongside 1,600 colonies of aerobic mesophilic bacteria per millilitre. Legionella thrives in warm, stagnant water between 25°C and 45°C. Inhaling contaminated vapour can lead to severe lung infections, especially in older adults or people with health conditions. Five other tested pools met hygiene standards, showing compliance is possible with proper upkeep. Meanwhile, Geneva University Hospitals reported no linked illnesses in the past 20 years. Experts stress that private hot tub owners should test pH and chlorine levels regularly. Complex maintenance, however, should always be left to professional technicians. The contaminated pools highlight the need for stricter water quality controls. Legionella poses a serious risk if left unchecked, particularly in poorly maintained facilities. Authorities are now reviewing maintenance protocols to prevent future breaches.