The World Health Organization (WHO) is set to revise its controversial guidelines on PFAS chemicals in drinking water following significant backlash from independent scientists and allegations of industry influence. The guidelines, originally proposed in 2022, were criticized for being too lenient, particularly in comparison to stricter limits set by the U.S. Environmental Protection Agency (EPA).

PFAS, often referred to as "forever chemicals" due to their persistence in the environment, have been linked to serious health issues, including cancer, liver damage, and immune disorders. The EPA has determined that no level of exposure to PFAS in drinking water is safe, setting its limits at an ultra-low four parts per trillion (ppt). In contrast, the WHO's draft guidelines proposed limits of 100 ppt, which sparked concern among environmental experts and water safety advocates.

“This is unprecedented, but the WHO got unprecedented criticism,” noted Betsy Southerland, a former EPA water division manager, emphasizing the extent of the pushback against the WHO's proposed limits.

The drilling industry, particularly those involved in water well drilling and groundwater management, is significantly impacted by PFAS contamination. For years, The Driller has emphasized the need for stringent regulations and proactive measures to address the risks posed by these persistent chemicals. As the WHO revises its guidelines, it’s crucial for industry professionals to stay informed and advocate for practices that ensure safe and clean water for communities. The evolving landscape of PFAS regulation continues to challenge the industry to adapt and innovate in safeguarding water resources.

The WHO’s decision to reconsider its guidelines involves a complete review of the scientific literature and the replacement of the panel that developed the draft guidelines with a new one, consisting of fewer industry-linked scientists. This move aims to restore trust in the process and ensure that the guidelines fully protect human health.

PFAS chemicals are used in a variety of consumer products for their water- and stain-resistant properties, but their persistence in the environment has led to widespread contamination of water sources. The WHO's original guidelines were criticized for ignoring credible research and failing to consider the extensive health data available on PFAS. The organization had previously dismissed much of the human and animal studies, claiming they were too flawed to be used, a decision that many experts found "shocking."

“There is far more health data for these chemicals than has ever been available for any pollutant in the history of the WHO,” Southerland added, underscoring the significance of the issue.

The controversy surrounding these guidelines highlights the ongoing global struggle to regulate PFAS and protect public health, particularly as these chemicals continue to be detected in water supplies worldwide. The upcoming revisions by the WHO will be closely watched by environmental groups, water utilities, and regulators as they navigate the complex challenges posed by PFAS contamination.