U.S. shale oil wells generate 27–45 million barrels of toxic wastewater every day, with shale gas adding billions more gallons annually. Traditional underground disposal is polluting groundwater, ...

In 1971, scientists gathered at a symposium to examine the practice of getting rid of oil and gas wastewater by injecting it into porous rock formations deep underground. Called injection wells, they ...

The oil industry’s wastewater is becoming a bigger headache for Texas operators and regulators. Here’s what to know about where it comes from, chemicals it contains, and why it’s becoming a more ...

This article was produced for ProPublica’s Local Reporting Network in partnership with The Frontier. This story is co-published with Grist, which contributed to its development. Sign up for Dispatches ...