Tap water contaminants linked with 100,000 cancer cases, US study finds

Most of the risk is from naturally occurring arsenic, the byproducts of chemicals used to disinfect water and contaminants

Contaminated tap water causes 100,000 cancer cases in the US over a lifetime, according to a new study from scientists with the Environmental Working Group.

Most of the cancer risk is from naturally occurring arsenic, the byproducts of chemicals used to disinfect water and radioactive contaminants, according to the analysis, which was published in the peer-reviewed journal Heylion.