It’s been almost 25 years since environmental crusader Erin Brockovich stood up for the residents of Hinkley, California after the carcinogenic chemical called chromium-6 was found in the town’s drinking water.

Unfortunately, the conflict over chromium-6 is far from over. A new EWG review of federal data from nationwide drinking water tests shows that the compound poisons water supplies for more than 200 million Americans in all 50 states.

This is despite the fact state scientists in California and elsewhere say chromium-6 causes cancer when ingested at even extraordinarily low levels. Federal regulations are hampered by a challenge from the chemical industry, which could mean no national laws governing the toxic compound.

In 2010, a groundbreaking EWG investigation found chromium-6 in the tap water of 31 cities. The findings prompted a Senate hearing. As a result, the EPA ordered local water utilities to begin the first nationwide tests for the unregulated contaminant.

From 2013 to 2015, utility companies took more than 60,000 samples of drinking water and found chromium-6 in more than 75 percent of them. EWG’s analysis of the test data estimates that water supplies serving 218 million Americans (over two-thirds of the population) contain more chromium-6 than the California scientists deemed safe.

With the release of EWG’s Tap Water Database, an additional 32 million Americans have been provided water that is contaminated with chromium-6.

Click on the map below to check the water in your area for chromium-6 contamination. Pull up the map below:

https://www.ewg.org/interactive-maps/2016-chromium6-lower-48.php