A new study shows that if you drink, bathe or swim in chlorinated water it may increase the risk of bladder cancer. The chemicals, mostly chlorine, used to disinfect water can be harmful when they are inhaled or absorbed through the skin.

The chemical by-product produced, called trihalomethanes (THM), can be a powerful carcinogenic because it does not get detoxified by the liver.

The researchers analyzed the average water THM levels in the 123 municipalities in the study. People living in households with an average household water THM of more than 49 micrograms per liter had double the bladder cancer risk of those living in households where water THM concentration was below 8 micrograms per liter. They noted that levels of about 50 micrograms per liter are common in industrialized societies.

Those who drank chlorinate water were at a 35 percent greater risk of bladder cancer than those who didn't and the use of swimming pools boosted bladder cancer risk by 57 percent.

Something else we need to worry about--great! I am not losing sleep over this one. I cannot take back all those years swimming in the backyard pool!