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The Climate Litigation Database

Environmental Defense Fund v. Zeldin

About this case

Filing year
2026
Status
Petition for review filed.
Docket number
26-1152
Court/admin entity
United StatesUnited States Federal CourtsUnited States Court of Appeals for the District of Columbia (D.C. Cir.)
Case category
Federal Statutory Claims (US)Clean Air Act (US)Environmentalist Lawsuits (US)
Principal law
United StatesClean Air Act (CAA)
At issue
Challenge to final EPA rule amending the New Source Performance Standards and Emission Guidelines for Existing Sources for the Crude Oil and Natural Gas Source Category in response to petitions for reconsideration of a March 2024 final rule.

Documents

Filing Date
Document
Type
Search results
06/08/2026
Petition for review filed.
Environmental Defense Fund filed a petition for review in the D.C. Circuit Court of Appeals challenging EPA’s April 2026 final rule amending the New Source Performance Standards and Emission Guidelines for Existing Sources for the Crude Oil and Natural Gas Source Category in response to petitions for reconsideration of a March 2024 final rule. EPA described the April 2026 amendments as making “discrete technical changes to the temporary flaring provisions for associated gas in certain situations” and finalizing “discrete technical changes to the vent gas net heating value (NHV) continuous monitoring requirements and alternative performance test (sampling demonstration) option for flares and enclosed combustion device(s).”
Petition

Summary

Challenge to final EPA rule amending the New Source Performance Standards and Emission Guidelines for Existing Sources for the Crude Oil and Natural Gas Source Category in response to petitions for reconsideration of a March 2024 final rule.