PERU WAS NOT ABOUT CHLORINE. “Lancet said in no uncertain terms in 1992 that the cholera outbreak did not result from a deliberate decision by health officials … the causes of the cholera epidemic in Peru were far more complex …. (a) the absence of water chlorination systems (or other water disinfection systems) in most of Peru; (e) the absence of sewage systems in many communities.”
http://www.rachel.org/?q=en/node/6430