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Legislators debate phasing out 6PPD in tires, citing salmon deaths and industry concerns
Summary
SB 6119 would ban tires containing the additive 6PPD by 2035, impose a mitigation fee and prioritize monitoring and removal of illegally dumped tires; scientists and conservation groups backed the bill citing acute salmon mortality, while manufacturers and dealers warned about safety, costs, and timing for validated alternatives.
The committee heard Senate Bill 6119, which would phase out the tire additive 6PPD that researchers say transforms into a compound (6PPD-quinone) that is acutely lethal to salmon at extremely low concentrations. The measure would prohibit sale and distribution of tires containing 6PPD beginning in 2035, establish a mitigation fee on tires ($3 for low-load tires, $6 for higher-load tires, rising 10% annually), and direct the Department of Ecology to develop rules addressing regrettable substitutes and allowable uses for mitigation revenue.
Alicia Kinney briefed members that the Safer Products for Washington program previously prioritized vehicle tires containing 6PPD; the…
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