The contamination is coming from the disposal of conventional, or non-fracked, oil and gas wastewater, which, under current state regulations, can still be treated and discharged to local streams.
"It’s not only fracking fluids that pose a risk; produced water from conventional, or non-fracked, oil and gas wells also contains high levels of radium, which is a radioactive element. Disposal of this wastewater causes an accumulation of radium on the stream sediments that decays over time and converts into other radioactive elements," said Avner Vengosh, professor of geochemistry and water quality at Duke’s Nicholas School of the Environment.
The level of radiation found in stream sediments at the disposal sites was about 650 times higher than radiation in upstream sediments. In some cases, it even exceeded the radioactivity level that requires disposal only at federally designated radioactive waste disposal sites. "Our analysis confirms that this accumulation of radioactivity is derived from the disposal of […]
Full article: Radioactivity from oil and gas wastewater persists in Pennsylvania stream sediments
New study examines impacts of fracking on water supplies worldwide
Oil and gas wastewater radioactivity persists in Pennsylvania stream sediments
Pennsylvania watershed contaminated with radioactive material and endocrine-disrupting chemicals
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