The Environmental Working Group (EWG) commends the important investigation of hydraulic fracturing released today (Jan. 31) by U.S. Reps. Henry A. Waxman (D-Calif.), Edward J. Markey (D-Mass) and Diana DeGette (D-Colo.). Their disturbing findings show that 1) oil and natural gas drilling companies injected more than 32 million gallons of diesel fuel or fluids containing diesel fuel in hydraulically fractured wells in 19 states between 2005 and 2009; and 2) no state and federal regulators have issued the required permits for this use of diesel fuel, an apparent violation of the Safe Drinking Water Act.