The report identifies several possible areas of concern, including: "water withdrawals in times of, or in areas with, low water availability; spills of hydraulic fracturing fluids and produced water; fracturing directly into underground drinking water resources; below ground migration of liquids and gases; and inadequate treatment and discharge of water."
However, the report says, "We did not find evidence that these mechanisms have led to widespread, systemic impacts on drinking water resources."
The report considered not only the hydraulic fracturing action itself, but all of the water-related steps necessary to drill, from acquiring water to disposing of it. Here's an illustration from the report:
The report, which the Obama administration had hoped would provide a definitive answer to a core question about the controversial drilling technique, has been five years in the making. During that time, the EPA has faced numerous battles with the oil and gas industry to procure necessary data. Even before the report was released, some scientists voiced skepticism about its findings because of gaps in the data regarding what types of chemicals were present in water supplies prior to fracking activities.
As Inside Climate News explains:
For the study's findings to be definitive, the EPA needed prospective, or baseline, studies. Scientists consider prospective water studies essential because they provide chemical snapshots of water immediately before and after fracking and then for a year or two afterward. This would be the most reliable way to determine whether oil and gas development contaminates surface water and nearby aquifers, and the findings could highlight industry practices that protect water. In other studies that found toxic chemicals or hydrocarbons in water wells, the industry argued that the substances were present before oil and gas development began.
Prospective studies were included in the EPA project's final plan in 2010 and were still described as a possibility in a December 2012 progress report to Congress. But the EPA couldn't legally force cooperation by oil and gas companies, almost all of which refused when the agency tried to persuade them.
Comment: At what point is such an impact on the water supply considered "systemic" or "widespread", and why is it only worth doing something about after it reaches such a point and the damage is irreversible? Even beyond the potential impact on groundwater supply, what about the potential for other disasters such as earthquakes or increasing drought problems? The evidence is clear that fracking poses a severe systemic threat to America's groundwater supplies, but apparently keeping the fracking industry going is more important than the overall health and well-being of the American people. How long before people say that enough is enough?