Bismarck – Chromium 6, a carcinogenic substance known as the Erin Brockovich chemical, has been found in hundreds of millions of Americans’ drinking water.
The metallic substance, which is naturally occurring, was also found in North Dakota.
Nine out of 11 city and county water systems tested in the state were positive for Chromium 6 in water sample testing between 2013-2015.
Currently, the Environmental Protection Agency does not regulate the chemical.
California is the only state to set a maximum limit on Chromium 6 at 10 parts per billion.
But one expert says though Chromium 6 was found in the state the amount is too low to cause concern.
“They did find Chromium 6 in about 75 percent of the samples at some level across the country but they were very low levels,” Greg Wavra, North Dakota Drinking Water Program says.
Scientists do not know how much exposure to Chromium 6 can produce health risks in humans.
But North Dakota’s positive samples did not exceed the California maximum, with the highest amount found being less than two parts per billion.
The counties and cities that tested positive for Chromium 6 in the state are Williams County, Ward County, Grand Forks, Mercer County, Stark County, Morton County, Burleigh County, Stutsman County, and Cass County. Rolette and Logan Counties were also tested but tested negative.