Quote Originally Posted by pmarc View Post
I notice some restriction to chlorine, mainly in the US.
I don't know what is the problem with chlorine, since that is the main chemical used in water treatment here. Also aluminum hydroxide, calcium oxide.

For emergrncy water treatment, I heard iodine is also good.
Well, for starters the stuff is carcinogenic....

"Cancer risk among people drinking chlorinated water is 93% higher than among those whose water does not contain chlorine."
U.S. Council of Environmental Quality

http://www.cleanwateramerica.com/inf...utchlorine.cfm


I won't use carcinogenic chemicals, where simple techniques that have been used for thousands of years will safely take care of the original problem of waterborne disease.