Washington, California, and Quebec sign carbon market linkage agreement | carboncredit.io
lynnwoodtimes.comWashington state signed a carbon market linkage agreement with California and Quebec on June 25, 2026. The deal connects the three cap-and-trade programs into the largest subnational carbon market in the world. Businesses in all three jurisdictions will be able to trade allowances across borders, and joint auctions will set a common allowance price. Washington expects its auction revenue to drop as prices converge toward the lower California-Quebec level, but total revenue across all three markets is projected to rise by about $8 billion cumulatively by 2045. The agreement replaces the prior 2017 Quebec-California deal and includes harmonized reporting rules, mutual recognition of compliance instruments, a shared registry, and an accounting mechanism to prevent double counting. Each jurisdiction keeps its own regulations and can exit with notice. Washington's Climate Commitment Act already authorizes the linkage, but California and Quebec must complete their own rulemaking processes before the linked market can launch. The earliest start date is expected in 2027. Some environmental justice groups have raised concerns about reduced funding for local projects in Washington and the risk of California and Quebec's large allowance bank suppressing prices. The agreement includes safeguards such as transparent accounting and the option for Washington to add facility-specific caps. The federal government does not need to approve the deal since Washington operates under its own state authority.
