EPA Section 111 Legal Risk

Every EPA power plant rule since 2015 has been challenged in court. The Supreme Court's West Virginia v. EPA (2022) introduced the "major questions doctrine," which requires explicit Congressional authorization for regulations with vast economic and political significance. This doctrine now hangs over every ambitious EPA climate rule, creating a legal ceiling that constrains regulatory ambition.

What West Virginia v. EPA decided. The Court ruled that the Clean Power Plan's generation-shifting approach (requiring states to change their electricity mix) was a "major question" that required clear Congressional authorization the CAA did not provide. EPA can set performance standards for individual plants but cannot restructure the electricity system.

The cascading risk. The 2024 Section 111 rule requiring 90% CCS at coal plants faces the same doctrine. If courts determine that mandating unproven technology at unprecedented scale is a "major question," the rule falls. Even vehicle emissions standards (which effectively mandate EV adoption) face major questions challenges. The doctrine creates a moving target: how ambitious can a regulation be before it becomes a "major question"?

The policy implication. Regulatory ambiguity deters investment. A utility deciding between a new gas plant (30-year asset) and renewables-plus-storage needs to know whether the gas plant will face CCS requirements. If the rule is struck down, the gas plant is safe; if upheld, it is stranded. Uncertainty favors the status quo.

Does the major questions doctrine make regulatory climate policy impossible?

Not impossible, but constrained. EPA can still set plant-level performance standards at achievable stringency levels. But the transformative rules (generation shifting, technology mandates) that would drive rapid decarbonization are legally vulnerable. The doctrine effectively requires Congress to act, which returns the problem to the 60-vote Senate barrier that created the regulatory approach in the first place.

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