CHEYENNE, Wyo. (AP) — A new study by the U.S. Geological Survey says more data is needed to be able to say for sure if a link exists between unconventional oil and gas development and degraded water quality.
The study published in the American Geophysical Union journal Water Resources Research finds no evidence hydraulic fracturing is polluting nearby surface water.READ MORE: Off-Duty Police Officer Shot Multiple Times In North Philadelphia, Police Say
However, the researchers say existing data to investigate long-term water quality trends is adequate in just 16 percent of U.S. watersheds with unconventional oil and gas resources.READ MORE: Philadelphia Police Arrest 2 Suspects In Connection To Murder Of 14-Year-Old Samir Jefferson, Who Was Shot Nearly 20 Times
Some environmentalists blame fracking for causing pollution. Fracking employs pressurized water mixed with sand and chemicals to break open oil and gas deposits underground.
The researchers say insufficient water-quality data from the years before fracking became commonplace impede long-term analysis of watersheds with oil and gas development.MORE NEWS: What We Know About 17-Year-Old Latif Williams, Wanted For Murder Of Temple Student Samuel Collington
Copyright 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.