The Environmental Protection Agency (EPA) confirmed on Tuesday that hydraulic fracturing, or fracking, contaminates drinking water—but claimed a lack of information makes it impossible to determine how widespread the risks are.

In a final report issued Tuesday, Hydraulic Fracturing for Oil and Gas: Impacts from the Hydraulic Fracturing Water Cycle on Drinking Water Resources, the EPA removed a finding included in a 2015 draft which indicated that fracking did not cause “widespread, systemic” harm. Fossil fuel industry lobbyists had praised that version of the draft—which also received misleading media coverage—claiming it vindicated the controversial drilling method that involves shooting chemical-laden water into shale rock at high pressure to release the gas trapped underneath.

And although Tuesday’s report stops short of making declarative statements about the severity or frequency of the impacts of fracking, environmental advocates say the confirmation that it contaminates water is enough. Green groups had accused the White House of inserting the now-removed clause, noting that President Barack Obama supports fracking as part of his “all of the above” energy policies.

The EPA’s own Science Advisory Board in August demanded a revision of the 2015 report, stating it was “lacking in several critical areas.”

“The EPA has confirmed what we’ve known all along: fracking can and does contaminate drinking water. We are pleased that the agency has acted on the recommendations of its Science Advisory Board and chosen be frank about the inherent harms and hazards of fracking,” said Wenonah Hauter, executive director of the environmental group Food & Water Watch. “Today the Obama administration has rightly prioritized facts and science, and put public health and environmental protection over the profit-driven interests of the oil and gas industry.”