In a rebuke to Texas regulators, the U.S. Environmental Protection Agency stated for the first time that there is a “significant possibility” that disposal wells for fracking are causing earthquakes in the Dallas area.
Irving, a northwest suburb of Dallas, has been rattled by several earthquakes since April 2014, with the highest magnitude of 3.6 recorded in January 2015. The earthquakes shook the city of 230,000 though there are no active fracking or wastewater injection wells in the city.
The Texas Railroad Commission, which regulates oil and gas drilling, has been reluctant to acknowledge any connection between drilling and earthquakes, despite the conclusions of scientists and regulators in other states. The commission has said that scientific data do “not sufficiently support a causal relationship,” according to the EPA.
But in an Aug. 15 report, the EPA said: “In light of findings from several researchers, its own analysis of some cases, and the fact that earthquakes in some areas diminished following shut-in or reduced injection volume in targeted wells, EPA believes there is significant possibility that North Texas earthquake activity is associated with disposal wells.”
The 61-page report is the EPA’s annual evaluation of the Railroad Commission’s underground injection control program released.
“This action resulted in successful voluntary closure or injection volume reduction for several Class II disposal wells,” the EPA said in the report. “Seismic activity in these three areas substantially diminished in frequency and magnitude; however, earthquake events continue in other areas of North Texas.”
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Contributed by David Lee of Courthouse News.