Erin Brockovich, the environmental activist who became famous due to the Oscar-winning movie named after her, accused the U.S. Environmental Protection Agency (EPA) on Tuesday of lying about the amount of toxic waste water that spilled into a Colorado river, according to AOL News. The spill, which was originally estimated to be 1 million gallons, turned out to be 3 million gallons.

Brockovich made the statement during her visit to the nation's biggest American Indian reservation, Navajo Nation, which was greatly affected by the spill, according to the U.S. News and World Report. During her speech, she expressed her shock at the agency's actions and response to the situation.

"They did not tell the truth about the amount. There were millions and millions of gallons," she said. "It's a terrible disaster, and unfortunately it's a situation we see playing itself out not only on the Navajo Nation, but across the United States of America."

Russell Begaye, president of the Navajo Nation, also has concerns as to whether the EPA is telling the truth regarding the numerous of gallons of toxic waste water released.

Navajo irrigation systems are currently shut down until further water testing can be conducted.

Brockovich believes that the EPA needs to take further action in order to deal with the consequences of their actions, according to The Washington Times.

"It must take steps to ensure this doesn't happen again, including firing people, taking action, and containing the toxic mining sites all across the west," she said.