Tap water may raise bladder cancer risk: study

Fri May 5, 1:40 PM ET

NEW YORK (Reuters Health) - Pooled data from six case-control studies suggest that higher consumption of tap water-based drinks may slightly increase the risk of bladder cancer among men.

The increased risk of bladder cancer with tap water consumption was "consistently found in all six studies, making chance an unlikely explanation," write investigators in the International Journal of Cancer.