An Environmental Working Group study suggests that 22 carcinogens found in tap water — including arsenic — could result in over 100,000 cancer cases.
A new report from an environmental advocacy watchdog group cautions that carcinogenic products in tap water may altogether increase cancer risk for thousands of U.S. residents over a lifetime.
Experts say that the risk of these carcinogens have been under debate for decades. They caution that the standards set for community water systems, which are regulated nationally by the Environmental Protection Agency , are complicated and require a balance between cost and safety. Long-term exposure to arsenic, per the World Health Organization, can cause skin cancer, as well as cancer of the bladder and the lungs. Meanwhile, byproducts of disinfectants have been classified by the National Institutes of Health and EPA as known and possible human carcinogens that can cause liver and bladder cancer.
A spokesperson with the EPA told USA TODAY that water regulations focus primarily on the contaminants that may cause the greatest public health risk. "For disinfectants," he said,"they've been in scrutiny over the decades and it's part of the reason why many cities have switched from chlorine to ozone."
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