"In Texas, there were more than 2,700 spills at oil and gas sites last year. But the state tracked only about half of those.
Unlike other states, Texas doesn't track spills of wastewater. The Texas Railroad Commission (RRC), which regulates oil and gas, tracks only spills of petroleum products -- primarily crude oil.
The difference in scrutiny makes no sense to Kerry Sublette, a chemical engineering professor at the University of Tulsa who says wastewater spills are more damaging."