These days, the information from any targetable source seems to have more to do with the threat of litigation than truth or helpfulness.<br><br>Just a guess, but perhaps chlorine, despite it's evident toxicity, it regarded as a "safe harbor" water purifying recommendation since it's pumped into municipal water supplies by the ton?<br><br>"Of course it's safe for you to drink, the government says so. Just don't put live fish in it, or they'll die..."