The Eagle Ford Shale is located in South Texas an comprises the counties of Atascosa, Austin, Bastrop, Bee, Brazos, Burleson, Colorado, DeWitt, Dimmit, Duval, Fayette, Frio, Goliad, Gonzales, Grimes, Karnes, La Salle, Lavaca, Lee, Leon, Live Oak, Madison, Maverick, McMullen, Milam, Robertson, Washington, Webb, Wilson, and Zavala