A recent report in the American Journal of Public Health linked chlorine to significant increases in certain types of cancer, asthma and skin irritations... and stated that up to 2/3 of the harmful exposure was due to skin absorption and inhalation of chlorine in shower water.
The U.S. EPA recently stated that, "Due to chlorine and showering, virtually every home in America has a detectable level of chloroform gas in the air." When chlorine vaporizes in steam, and combines with other organic compounds in the air, it converts to chloroform. Chloroform is a strong respiratory irritant and causes fatigue”.