In the 2000 biographical film about a legal clerk who brings a major utility company to its knees for poisoning residents of Hinkley, California, Erin Brockovich ended on a Hollywood high note with a $333m settlement from PG&E. But chromium-6 contamination of America's drinking water is an ongoing battle the US Environmental Protection Agency (EPA) is losing. Nearly 200 million Americans across all 50 states are exposed to unsafe levels of chromium-6 or hexavalent chromium, a heavy metal known to cause cancer in animals and humans, according to a new report released Tuesday by the nonprofit research and advocacy organization Environmental Working Group (EWG). In their analysis of the EPA's own data collected for the first nationwide test of chromium-6 contamination in US drinking water, the [EWG] found that 12,000 Americans are at risk of getting cancer. "More than two-thirds of Americans' drinking water supply has more chromium than the level that California scientists say is safe - a number that's been confirmed by scientists in both New Jersey and North Carolina," according to [report co-author Bill] Walker. "Despite this widespread contamination, the US currently has no national drinking water standard for chromium-6." Erin Brockovich urges Americans to disregard the EPA's reassurances and to take a more active role in their communities to fix the country's broken water supply.