The Ninth Circuit Court of Appeals has ruled in favor of the Yurok Tribe and other petitioners in a case concerning the regulation of decabromodiphenyl ether (decaBDE), a toxic chemical used as a flame retardant. The court found that the Environmental Protection Agency (EPA) failed to provide sufficient evidence for its decision not to regulate decaBDE in certain areas, such as recycling and wastewater. This ruling could have significant implications for environmental health and safety.

The case, Yurok Tribe v. U.S. Environmental Protection Agency, was filed under docket number 21-70670. The petitioners, which included the Yurok Tribe, the Consumer Federation of America, and the Center for Environmental Transformation, challenged the EPA's 2024 Rule regarding decaBDE regulation. The court's decision means that the EPA must revisit its regulations on this hazardous substance.

DecaBDE is a persistent, bioaccumulative, and toxic chemical that poses serious health risks, including damage to the immune and reproductive systems, and has been linked to cancer. The chemical is commonly found in various products, including electronics and furniture. The EPA was mandated by the Toxic Substances Control Act (TSCA) to propose risk management rules for decaBDE, but the agency's actions have been criticized for lacking adequate regulatory measures.

The dispute began after the EPA issued a risk management rule in 2021, which was later amended in 2024. Petitioners argued that the EPA's failure to regulate decaBDE in recycling, disposal, wastewater, and sewage sludge was not supported by substantial evidence. They contended that the agency's rationale for not regulating these areas was flawed and did not adequately address the potential risks associated with decaBDE exposure.

The court's ruling focused on several key points regarding the EPA's regulatory decisions. The judges found that the EPA's claims of low levels of decaBDE exposure did not justify a lack of regulation, as the TSCA specifically requires action on hazardous substances regardless of exposure levels. The court emphasized that the EPA must take action to mitigate risks associated with decaBDE and cannot defer to other regulatory frameworks, such as the Resource Conservation and Recovery Act (RCRA), to avoid its responsibilities under TSCA.

In its opinion, the court stated, "EPA’s decisions to not further regulate decaBDE exposures in recyclable articles, disposal, wastewater and sewage sludge under TSCA § 6(h) were not supported by substantial evidence." The ruling was delivered by Circuit Judges Sidney R. Thomas and Ronald M. Gould, along with District Judge Brian M. Morris.

The impact of this ruling is significant, as it requires the EPA to reassess its regulatory framework for decaBDE. The court's decision could lead to stricter regulations on how decaBDE is managed in various industries, potentially reducing exposure to this harmful chemical. This ruling not only affects manufacturers and industries that use decaBDE but also has broader implications for public health and environmental safety.

Furthermore, the ruling reinforces the importance of the TSCA's provisions aimed at protecting human health and the environment from hazardous substances. The court's decision serves as a reminder that regulatory agencies must provide substantial evidence to support their decisions, especially when it comes to public health and safety.

Looking ahead, the EPA has been instructed to conduct renewed rulemaking regarding decaBDE. The court remanded the case without vacatur, meaning that the existing 2024 Rule will remain in effect while the agency revisits its regulations. This approach aims to prevent further health and environmental harm during the reassessment process.

As of now, it is unclear whether the EPA will appeal this ruling or if there are related cases pending in the courts. However, this decision marks a significant step in the ongoing efforts to regulate hazardous chemicals and protect public health.