Scott Pruitt has made moves to fundamentally shift the EPA's approach to science. | Jason Andrew/Getty Images Pruitt scales back EPA’s use of science

Environmental Protection Agency chief Scott Pruitt announced Tuesday he would seek to bar the agency from relying on studies that don't publicly disclose all their data, a major policy change that has long been sought by conservatives that will sharply reduce the research the agency can rely on when crafting new regulations.

The unveiling of the proposed rule delivers a win to Republicans like House Science Chairman Lamar Smith (R-Texas), who unsuccessfully pushed legislation to impose the same type of change. The move also demonstrates Pruitt’s persistence in pursuing President Donald Trump’s anti-regulation agenda just two days before the embattled EPA chief is due to face fierce questioning from lawmakers about his hefty spending, expanded security detail and cheap condominium rental from the wife of an energy lobbyist.


At an invitation-only meeting at EPA headquarters with Smith, Sen. Mike Rounds (R-S.D.) and other supporters of the policy, Pruitt said the proposed rule was critical in ensuring that the agency was transparent about how it is making decisions to justify costly new regulations. It is the latest step Pruitt has taken to fundamentally shift the agency’s approach to science.

"It is a codification of an approach that says as we do our business at the agency the science that we use is going to be transparent, it’s going to be reproduceable, it’s going to be able to be analyzed by those in the marketplace. And those who watch what we do can make informed decisions about whether we’ve drawn the proper conclusions or not,” Pruitt said.

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Text of the proposed rule was not immediately available.

The proposal, based on legislation pushed by Smith, is intensely controversial, and scientists and public health groups say it will prevent federal regulators from enacting health and safety protections. Nearly 1,000 scientists, including former EPA career staffers, signed a letter opposing the policy sent by the Union of Concerned Scientists to Pruitt on Monday.

Their primary concern was that many of the country's bedrock air and water quality regulations are based on research that cannot disclose raw data because it includes the personal health information.

But industry has its own version of the same problem. EPA often relies on industry studies that are considered by companies to be confidential business information when determining whether new pesticides and toxic chemicals are safe to use. Internal EPA emails obtained under the Freedom of Information Act show that EPA political officials, including Nancy Beck, who became the chief of the agency’s chemical safety office last year after working for years at a chemical industry lobbying group, worried that the new policy would limit the agency’s ability to consider industry data or would force companies to make this proprietary data public.

“We will need to thread this one real tight!” Richard Yamada, political official who led work on the new policy wrote to Beck after she raised the concerns.

It was not immediately clear if the new proposed rule included measures to address those concerns.

Rush Holt, CEO of the American Association for the Advancement of Science, said Pruitt’s changes could keep the agency from revising public health regulations as problems arise or new data comes to light.

“On the surface it sounds so innocuous or even beneficial. What could be wrong with transparency? Well it’s clear to me that this is not based on an effort to be transparent. It is rather based on an effort to be just the opposite,” he said.

“EPA is particularly important because when science is misused, people die,” he added.

Pruitt has been discussing the new scientific policy publicly for weeks, but it only went to the White House for interagency review last week. Such swift review is very rare for the Office of Management and Budget, which often takes months to vet a new policy. At least one group, the Environmental Defense Fund, has requested a meeting with OMB officials to discuss the rule, but OMB's website shows that no meetings have been scheduled with interested groups.

Many public health studies can’t be replicated without exposing people to contaminants, and environmental disasters such as the Deepwater Horizon oil spill cannot be recreated, the group said, raising intellectual property, proprietary and privacy concerns.

Pruitt’s predecessor Gina McCarthy, and her air chief Janet McCabe, in an op-ed in The New York Times in March said concerns about studies are dealt with through the existing peer-review process, which ensures scientific integrity.

“[Pruitt] and some conservative members of Congress are setting up a nonexistent problem in order to prevent the E.P.A. from using the best available science,” they said.