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AFP - Swimming in chlorinated pools can cause an increased risk of cancer in bathers, Spanish researchers said on Monday.  Researchers from the Barcelona-based Centre of Research in Environmental Epidemiology (CREAL) and Research Institute Hospital del Mar studied changes in indicators of mutagenicity -- permanent mutation of the DNA -- among a group of swimmers in an indoor chlorinated pool. "The evidence of genotoxic effects were observed in 49 healthy adults after swimming for 40 minutes in a chlorinated indoor pool," CREAL said in a statement on Monday. Researchers found indicators of an increase in cancer risk in healthy subjects as well as potential respiratory effects from the cholorine used as a disinfectant, the statement said. The study was published on Sunday in the US journal Environmental Health Perspectives.
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Wisconsin Department of Health ServicesWisconsin Department of Health Services
Cancer: Chloroform is suspected of causing cancer. Liver and kidney tumors have been reported in laboratory animals. Any exposure to a cancer-causing chemical may increase your risk of developing cancer.

Reproductive Effects: The reproductive and developmental effects of chloroform are not known. However, chloroform can enter the bloodstream of a developing baby.

Water: The state groundwater standard for chloroform is 6 parts per billion (ppb). The state and federal drinking water standard for total trihalomethanes in chlorinated, municipal drinking water supplies is 100 ppb. We suggest you stop drinking water that contains more than the standard for your water supply. If levels of chloroform or trihalomethanes are very high in your water, you may also need to avoid washing, bathing, or using the water for other purposes. Contact your local public health agency for more information specific to your situation.

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