The Environmental Protection Agency's (EPA) decision to sideline its independent chemical referee, the Integrated Risk Information System (IRIS), poses a significant threat to public health. This move, driven by the Trump administration, marks a departure from decades of relying on impartial scientific assessments to evaluate chemical hazards. The IRIS program, once a cornerstone of evidence-based decision-making, is now at risk of being politicized, with potential real-world consequences for public health.
The IRIS program, housed within the EPA's Office of Research and Development, played a crucial role in answering fundamental questions about chemical safety. It assessed whether chemicals posed threats to human health and determined the exposure levels necessary to trigger concerns. This process was meticulously designed to be neutral, with EPA scientists rigorously reviewing and refining assessments, and independent external peer reviewers providing critical feedback. The program's assessments were then used across various EPA programs and by state, local, and international entities, ensuring a comprehensive and transparent approach to chemical hazard evaluation.
What sets IRIS apart is its commitment to evidence-based decision-making. When disagreements arose, independent scientific experts were consulted to ensure that conclusions were grounded in evidence, not influenced by policy preferences or financial interests. This process was a cornerstone of the program's credibility and reliability.
However, critics, often aligned with industry interests, have long challenged the IRIS program. They claim that the assessments are flawed or biased, despite independent scientific reviews consistently affirming the program's methods and rigor. The delay in assessments, often taking years, was attributed to extensive interagency review and limited staffing, not poor science.
The removal of IRIS as an independent program shifts the oversight of chemical hazard assessments to regulatory offices. These offices, responsible for policy decisions, may prioritize economic impacts, legal risks, and political priorities over scientific evidence. This shift blurs the line between evaluating evidence and weighing its regulatory consequences, potentially leading to politicization and delays in regulation.
The consequences of this politicization are far-reaching. When public health is at stake, independent referees are essential to ensure that facts are determined by evidence, not by the industries that stand to benefit. The loss of this impartiality risks undermining the very foundation of evidence-based decision-making, potentially leading to prolonged litigation and delays in regulating hazardous chemicals.
In conclusion, the sidelining of IRIS by the EPA represents a dangerous departure from evidence-based decision-making. It opens the door to political interference and undermines the public's trust in scientific assessments. As an expert in environmental engineering and former assistant administrator of the EPA's Office of Research and Development, I strongly believe that maintaining an independent scientific referee is crucial for safeguarding public health and ensuring that chemical hazards are addressed based on evidence, not political agendas.
