Many people find the lower amount of chlorine makes the water more comfortable to swim in and less drying to the skin after a swim. The heavy chlorine smell generally associated with swimming pools is not present in salt water pools, which is wonderful if you are sensitive to scents or have allergies.
Pure chlorine pools create organochlorines which mimic human hormones. They can cause reduced fertility, immune system abnormalities, and numerous cancers. Chloromines can also cause or worsen emphysema and asthma. Saltwater swimming pools do not have this problem because chlorine levels never drop low enough for organochlorines to form

my daughter started to have a reaction while swimming during club training and competitions, she started having problems such as being unable to pick up pace, sprint, loss of stamina. She also developed a cough and we took her to see a doctor who diagnosed that she had a bronchial tract irritation, her results from the Peak Flow Meter were not good '300'. Nine months later and after using inhalers for a short time she now reads 390-400, she has always had a reactive sneeze when swimming in chlorinated pools, therefore uses antihistimines daily. She is 13 now but has been a club swimmer since 8yrs old, has swam at National level and wants to continue but back in training she is starting to have a tightness and is feeling she can't breathe, doctors don't want to register her as asthmatic but I'm not so sure now. At school she does cross country with no problems, goes to a rural school, lives in a rural area with loads of pollen and has no problems. I'm sure she has developed chlorine related asthma and would like to see chlorine banned from public sports and leisure areas, I would also like to know the best way for my daughter to combat the effects to allow her to continue competing at a high level.