The report details information obtained during the EPA’s outreach to stakeholders. The information in the report will help the EPA determine whether any future actions are appropriate to address oil and gas extraction waste water further. Elevated concentrations of strontium, an element associated with oil and gas waste waters, have accumulated in the shells of freshwater mussels downstream from wastewater disposal sites, according to researchers from Penn State and Union College. With concern growing that the underlying geology in the Permian Basin is reaching capacity for disposal wells, the Trump administration is examining whether to adjust decades-old federal clean-water regulations to allow drillers to discharge waste water directly into rivers and streams. The US Environmental Protection Agency (EPA) is embarking on a new study that will take a holistic look at how the EPA, states, and stakeholders regulate and manage waste water from the oil and gas industry.