U.S. Regulators Review Chemical Found in Tires That Harms Salmon, Prompting Calls for Ban

Introduction:

The Environmental Protection Agency (EPA) in the United States has announced its intention to review the use of a chemical called 6PPD, which is commonly found in tires. This decision comes in response to a petition from West Coast Native American tribes, including the Yurok tribe in California and the Port Gamble S'Klallam and Puyallup tribes in Washington, who have urged the EPA to ban the chemical due to its harmful effects on salmon populations. The tribes argue that when rainwater washes the chemical from roadways into rivers, it poses a significant threat to fish, particularly coho salmon. The EPA's decision marks the beginning of a regulatory process that could result in the banning of the chemical.

The Environmental Impact of 6PPD:
6PPD has been used as a rubber preservative in tires for the past six decades and is also present in footwear, synthetic turf, and playground equipment. As tires wear down, small particles of rubber containing the chemical are left on roads and parking lots. When exposed to environmental conditions, 6PPD breaks down into a byproduct known as 6PPD-quinone, which is highly toxic to salmon, steelhead trout, and other aquatic wildlife. Coho salmon, in particular, appear to be especially vulnerable, with the chemical capable of killing them within hours of exposure. The salmon populations are of great cultural and dietary importance to Pacific Northwest and California tribes, who have long fought to protect these fish from various threats, including climate change, pollution, development, and dam construction.

Petition and EPA Response:
The Yurok, Port Gamble S'Klallam, and Puyallup tribes, along with several states including Washington, Oregon, Vermont, Rhode Island, and Connecticut, submitted a petition to the EPA earlier this year, urging the agency to ban 6PPD due to its detrimental impact on water bodies and fisheries. The EPA's decision to grant the petition signifies the recognition of the chemical's potential harm and initiates a regulatory process to assess its risks further. As part of this process, the EPA intends to gather additional information and data, which will inform proposed regulations. The agency also plans to require manufacturers and importers of 6PPD to report unpublished health and safety studies by the end of the following year.

Tire Manufacturers Seek Alternatives:
In response to the EPA's decision, tire manufacturers have already begun searching for alternative rubber preservatives that meet federal safety requirements. The U.S. Tire Manufacturers Association emphasizes that ensuring public safety and maintaining the national economy are crucial considerations during this transition. While no suitable alternative has been identified yet, tire manufacturers are committed to finding a replacement for 6PPD.

Environmental Concerns and Future Considerations:
Environmental experts and advocates have hailed the EPA's decision as a significant step towards addressing a long-standing issue. However, some caution that the harmful effects on salmon may be the result of a combination of chemicals and microplastics rather than solely attributable to 6PPD. Suanne Brander, an associate professor and ecotoxicologist at Oregon State University, emphasizes the importance of considering the overall mixture of chemicals to which fish are exposed. As the search for alternative preservatives progresses, it will be essential to ensure that any new chemical used does not pose similar risks to aquatic ecosystems.

Conclusion:
The EPA's decision to review the use of 6PPD in tires following a petition by West Coast Native American tribes and several states reflects growing concerns over the chemical's impact on salmon populations. The long regulatory process that ensues could potentially lead to a ban on 6PPD. Meanwhile, tire manufacturers are actively seeking alternative preservatives that meet safety requirements. This development highlights the need to address the environmental impact of chemicals and microplastics in order to safeguard the delicate balance of aquatic ecosystems. By taking steps to mitigate the harmful effects of 6PPD and exploring safer alternatives, the aim is to protect the vital salmon populations and preserve the cultural and ecological significance they hold for indigenous tribes and local communities.