A serious error occurred in Tarnów during water quality control checks at swimming pools. Water samples taken for microbiological testing were mixed up in the laboratory, leading to the closure of the wrong facility. Instead of the Aqua Park, where the dangerous bacteria Legionella pneumophila was actually detected, sanitary services shut down a pool in the Mościce district. The mistake persisted for about a week, during which patrons unknowingly used contaminated water. After the error was discovered, the correct facility was immediately closed and disinfected. The authorities have launched an explanatory investigation.
Laboratory sample mix-up
Water samples taken for microbiological testing from Tarnów's swimming pools were mixed up in the laboratory. Instead of the Aqua Park, where Legionella bacteria were detected, a pool in the Mościce district was closed.
Dangerous bacteria in water
Legionella pneumophila bacteria, which can cause severe pneumonia, were detected in the water of Tarnów's Aqua Park. Infection occurs through inhalation of water aerosol.
Week-long error and response
The mistake persisted for about a week, during which customers unknowingly used contaminated water. After the error was discovered, the Aqua Park was closed and disinfected.
Explanatory investigation
Sanitary services have launched an investigation to determine at which stage of the procedure – sampling, transport, or analysis – the error occurred. Strengthened oversight has been announced.
A bizarre and potentially dangerous mistake occurred in Tarnów during routine water quality checks at swimming pools. Water samples taken for microbiological testing were mixed up in the laboratory, leading to the closure of the wrong facility. Instead of the Aqua Park, where the dangerous bacteria Legionella pneumophila was actually detected, sanitary services shut down a pool in the Mościce district. The mistake persisted for about a week, during which patrons unknowingly used contaminated water. Bacteria of the Legionella genus are common in aquatic environments, especially in warm, stagnant water. Legionellosis was first identified during an outbreak among attendees of an American Legion convention in Philadelphia in 1976. Since then, regular water controls in air conditioning systems, swimming pools, and water intakes have become standard in many countries, including Poland. The dangerous bacteria pose a serious public health threat as it can cause severe pneumonia. Infection occurs through inhalation of water aerosol containing the bacteria, for example from showers or hot tubs. Precisely because of this risk, regular water testing in pool facilities is mandatory and conducted by county sanitary-epidemiological stations. After the error was discovered, the correct facility – the Tarnów Aqua Park – was immediately closed. A disinfection process was carried out and new water samples were taken to confirm its safety. Sanitary services have launched an explanatory procedure to determine at which stage of the process – sampling, transport, or analysis – the error occurred. The case has caused concern and criticism from residents towards the control system meant to ensure their safety. Local authorities and pool facility managers have announced strengthened oversight and the introduction of additional verification procedures to prevent a similar situation from recurring in the future.