WHO To Scrap Weak PFAS Drinking Water Guidelines After Alleged Corruption

An anonymous reader quotes a report from The Guardian: The World Health Organization (WHO) is poised to scrap controversial drinking water guidelines proposed for two toxic PFAS "forever chemicals." The move follows allegations that the process of developing the figures was corrupted by industry-linked researchers aiming to undercut strict new US PFAS limits and weaken standards in the developing world. Many independent scientists charged that the proposed WHO drinking water guidelines for perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) were weak, did not fully protect human health, ignored credible research, and were far above limits set by regulators in the US and EU. The guidelines would have allowed far more PFAS in drinking water than what is allowed by the US Environmental Protection Agency. Though the earlier guidelines were drafts, and proposed rules all go through a revision process, the WHO is conducting an entirely new review of scientific literature and disbanded the panel of scientists who developed the draft guidelines. It established a new panel with fewer industry-linked scientists and more regulatory officials, moves that have not happened in other revisions, said Betsy Southerland, a former EPA manager in the agency's water division. "This is unprecedented, but the WHO got unprecedented criticism," Southerland said. The WHO told the Guardian in a statement that the moves are part of "an ongoing process" and will include guidelines for other PFAS compounds. Scientists critical of the limits charged that the WHO ignored high-quality research to create a sense of doubt about the science around PFAS. EPA and EU regulators carried out an exhaustive literature review to find all human and animal studies, and used the best of those papers to establish their limits, Southerland said. The WHO, however, ignored all human studies and determined most animal studies were "too flawed" to use, Southerland said. The organization concluded there was not enough research to set health-based guidelines, which she called a "shocking decision." "There is far more health data for these chemicals than has ever been available for any pollutant in the history of the WHO," Southerland said. Instead, the WHO largely based its guidelines on its review of technological research, but ignored most of those studies as well, Southerland said. The body concluded filtration systems could reliably remove PFOA and PFOS at 100ppt, even though US water utilities remove it below four ppt. The decisions bear industry's prints, researchers say.

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