And it is becoming more vocal about its involvement in the shallow water Gulf, as well.

FORBES: A Little Bit Louder Now, Chevron Starts To Shout About Davy Jones And The Ultra Deep

The Texas Railroad Commission, using chemical fingerprinting, maintains that the EPA is wrong and that the gas seeped into the well from a shallow formation a few hundred feet beneath the surface, much closer to the water wells.

WSJ: Daniel Yergin on the Shale Gas Revolution: Stepping on the Gas