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WASHINGTON — The Environmental Protection Agency plans to dissolve its Office of the Science Advisor, a senior post that was created to counsel the E.P.A. administrator on the scientific research underpinning health and environmental regulations, according to a person familiar with the agency’s plans. The person spoke anonymously because the decision had not yet been made public.

The science adviser works across the agency to ensure that the highest quality science is integrated into the agency’s policies and decisions, according to the E.P.A.’s website. The move is the latest among several steps taken by the Trump administration that appear to have diminished the role of scientific research in policymaking while the administration pursues an agenda of rolling back regulations.

Asked about the E.P.A.’s plans, John Konkus, a spokesman for the agency, emailed a prepared statement from the science adviser, Jennifer Orme-Zavaleta, in which she described the decision to dissolve the office as one that would “combine offices with similar functions” and “eliminate redundancies.”

In an email, Dr. Orme-Zavaleta referred questions to the E.P.A.’s public affairs office.

Dr. Orme-Zavaleta is an expert on the risks of chemicals to human health who has worked at the E.P.A. since 1981, according to the agency’s website. It was unclear whether she would remain at the E.P.A. once the decision takes effect.