On July 1, 2026, Communities for a Better Environment (CBE), a U.S.-based environmental justice and policy non-profit, filed a lawsuit against the California Air Resources Board (CARB) in the Los Angeles County Superior Court. The organization challenged the amendments to California's Cap-and-Invest Program approved by CARB on May 29, 2026. The regulatory package extends the program through 2045 while introducing several structural reforms intended to align it with California's 2030 emissions reduction targets and its carbon neutrality goal by 2045.
The lawsuit centers on CARB's compliance with the California Environmental Quality Act (CEQA), with a particular focus on the adequacy of the Environmental Impact Assessment (EIA) and the Manufacturing Decarbonization Incentive (MDI), including the use of eligible decarbonization investments for compliance.
According to the lawsuit, CARB approved the amendments without completing an adequate Environmental Impact Assessment (EIA). The filing states that the agency did not sufficiently evaluate the potential impacts of the new rules on local air quality, environmental justice communities, and state climate-related revenues.
In addition, another focus of the lawsuit is CARB's newly established MDI, a mechanism designed to encourage industrial decarbonization through investments in approved emissions reduction projects, including carbon capture and storage technologies. Under the amended regulations, industrial facilities, including liquid fuel suppliers and oil refineries, may receive access to approximately 118.3 million free allowances between 2028 and 2035 if they undertake eligible decarbonization projects. According to CBE, the final regulations represent a significant policy shift from CARB's original January 2026 proposal. The amendments expanded eligibility to include oil refineries and placed the incentive allowances outside the program's annual emissions cap. According to the lawsuit, this change weakens the integrity of California's emissions cap by increasing the supply of compliance instruments beyond the capped allowance budgets.
Lastly, the lawsuit argues that allowing large industrial emitters to meet part of their compliance obligations through eligible decarbonization investments, instead of purchasing allowances, could result in continued emissions from facilities located in frontline communities already affected by high levels of local air pollution. In addition, CBE cites estimates from California's Legislative Analyst's Office indicating that the expanded incentive program could reduce annual revenues to the Greenhouse Gas Reduction Fund (GGRF) by approximately USD 2 billion. The GGRF supports a range of climate and environmental justice initiatives, including affordable housing, clean drinking water infrastructure, and public transit projects.
As part of the legal challenge, CBE is seeking an injunction, a court order that would temporarily prevent the amended regulations from taking effect on September 1, 2026, until CARB completes a revised environmental review process.
Implications for California's Carbon Market
The ongoing legal challenge introduces near-term uncertainty for participants in California's compliance carbon market. If the court grants an injunction before the September 1 implementation date, key elements of the amended program, including the allocation of free allowances for electric utilities and emissions-intensive, trade-exposed (EITE) industries, could be delayed. This could create uncertainty around compliance obligations, allowance allocation schedules, and investment decisions, while potentially increasing short-term market volatility. Although the broader legislative mandate to extend California's Cap-and-Invest Program through 2045 remains unchanged, the timing and implementation of the updated regulations remain subject to the outcome of the litigation.
Potential Impacts on the California–Québec–Washington Linked Market
The lawsuit was filed at a critical stage in the expansion of North America's largest linked carbon market. Following the June 25, 2026 agreement between California, Québec, and Washington to link Washington's Cap-and-Invest Program with the existing California-Québec market, the jurisdictions are progressing toward a fully integrated market expected to begin operating in 2027 through joint allowance auctions and a common carbon price. While the lawsuit does not directly challenge the linkage agreement, it could introduce uncertainty to the timeline. If CARB's May 2026 amendments are further revised, key market design elements, including allowance budgets, allocation methodologies, and the treatment of the Manufacturing Decarbonization Incentive (MDI), may require reassessment, potentially delaying the implementation timeline.
ClearBlue is actively monitoring these developments. For more information regarding ClearBlue’s advisory services or market intelligence coverage, please contact us.