Research brief: Swimming pools could worsen asthma

Exposure to chloramine in swimming pools could increase the risk of asthma and respiratory problems, according to Dutch research. For the study, 624 staff from six swimming pools were surveyed. Compared with the general population, the staff were 2.6 times more likely to have had an asthma attack in the past year and 7.2 times more likely to experience dyspnoea when walking. Trichloramine is the most likely culprit, say the researchers, because the amounts of the chemical can be more than double comfortable levels (Eur Resp J Online 2007; 29: 690–8).

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