CITIZEN POWER ALLIANCE

In a statement, EPA officials say, "EPA scientists are undertaking a study of this practice to better understand any potential impacts it may have on drinking water resources. While we conduct this study, we will not hesitate to take any steps under the law to protect Americans whose health may be at risk."

It's not enough to satisfy Karen Glauber.

"It should make people suspect to the whole process of who is controlling what information," she said.

The EPA's national study into the risk of the hydrofracking process is expected to be completed in 2012.

Congressman Maurice Hinchey sent a letter to the head of the EPA Monday calling for a swifter, more thorough investigation into the hazards of hydrofracking on drinking water.

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