A compound used to give tires longer life has been linked to salmon die-offs in the Pacific Northwest. Trace amounts have been found in Bay Area creeks.
Amid research linking a highly toxic tire chemical to salmon deaths in the Pacific Northwest, California officials are proposing a rule to require tire manufacturers to consider safer alternatives.
“The recent research linking 6PPD to coho salmon deaths is extremely compelling,” said department director Meredith Williams. “It is clear that particles containing this chemical are entering our waterways. This is also a national issue. California is taking a leadership role in protecting our fish, our environment and the cultural heritage of Native American tribes with rich salmon fishing traditions.
The threat comes after tiny particles of tire break off on roads. The chemical interacts with ground-level ozone to create a new compound, 6PPD-quinone, which then washes into creeks and rivers when it rains. “We are pleased that there have been many advancements in the body of research on 6PPD-Quinone,” said Sarah Amick, a vice president at the association. “However, many data gaps still remain, so we remain committed to collaborating with researchers, regulators and stakeholders to fill these knowledge gaps and help find a viable alternative to 6PPD that does not compromise tire performance or driver safety and also ensures environmental safety.
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