Chlorine and Water Treatment:
Report for the New York City Council, 2053
... on the other hand, opponents claim chlorine compounds can cause cancer, infertility, or birth defects. However, recent research indicates that the increased risk of cancer from chlorinated water is minimal or nonexistent.
For example, a 2034 toxicological study found no carcinogenic effects at chlorine concentrations a thousand times higher than the Environmental Protection Agency revised Kyoto standards. And the International Agency for Research on Cancer concluded population studies on cancer rates were too flawed to draw any conclusions.
Water chlorination is just one target for some activists; they advocate eliminating some or all of the 15,000 chlorine compounds now in use. This would include most plastics, almost 85 percent of pharmaceuticals, and 96 percent of crop-protection chemicals.
Yet most of the chlorine in the world occurs naturally. The annual global emission of some 1,500 naturally occurring chlorinated organic chemicals totals five million tons, compared to human emissions of chlorine compounds of only 26,000 tons...