The Biden-led Environmental Protection Agency says Trump administration political officials “compromised” an assessment of chemical dangers and has replaced it with a new one they say “upholds the tenants of scientific integrity.”

“The assessment posted today fixes the errors in the version issued earlier this year, was developed by EPA career scientists, and upholds the values of scientific integrity,” Dr. Jennifer Orme-Zavaleta, acting assistant administrator for the Office of Research and Development and the agency’s science adviser said in a statement. “This PFBS (Perfluorobutane sulfonic acid) assessment reflects the best available science, involved extensive federal, state, and public engagement, and is critical to EPA efforts to help communities impacted by PFAS.” PFAS, which stands for per- and polyfluoroalkyl substances, is a family of synthetic chemicals known for links to health complications.
After taking office, President Joe Biden’s EPA said that it was removing a toxicity assessment for PFAS due to allegations that Trump administration officials overruled science to make it easier for regulators set their own standards and did not offer clear conclusions. In a statement, the EPA called the new Biden era assessment part of the agency’s “commitment to restore scientific integrity.”