Case: Commonwealth of Massachusetts v. EPA

26-01061 | U.S. Court of Appeals for the District of Columbia Circuit

Filed Date: March 19, 2026

Case Ongoing

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Case Summary

This case challenged the Trump Administration’s Environmental Protection Agency’s (EPA) decision to rescind its 2009 finding that greenhouse gas emissions (GHG) endanger public health. On February 12, 2026, the EPA rescinded its 2009 “Endangerment Finding” that motor vehicle greenhouse gas (GHG) emissions endanger public health and are therefore subject to emission standards under the Clean Air Act (CAA). On March 19, 2026, the Commonwealth of Massachusetts, the State of California, and other s…

This case challenged the Trump Administration’s Environmental Protection Agency’s (EPA) decision to rescind its 2009 finding that greenhouse gas emissions (GHG) endanger public health.

On February 12, 2026, the EPA rescinded its 2009 “Endangerment Finding” that motor vehicle greenhouse gas (GHG) emissions endanger public health and are therefore subject to emission standards under the Clean Air Act (CAA). On March 19, 2026, the Commonwealth of Massachusetts, the State of California, and other states, municipalities, and jurisdictions filed a petition for review challenging the action of the EPA and its Administrator in the United States Court of Appeals for the District of Columbia Circuit. The case was assigned to Circuit Judges Justin R. Walker, J. Michelle Childs, and Bradley N. Garcia.

The petitioners argued that in rescinding the Endangerment Finding, the EPA violated the CAA and the Administrative Procedure Act (APA). They contended that the EPA lacks the statutory authority under Section 202(a)(1) of the CAA to rescind the Endangerment Finding—a determination previously upheld by the landmark Supreme Court in Massachusetts v. EPA (2007). They further asserted that the EPA violated the APA by failing to provide a reasoned justification for its reversal, ignoring substantial reliance interests, and inadequately responding to public comments. The petitioners disputed the EPA’s invocation of the major questions doctrine, which limits a federal agency’s ability to decide an issue of vast economic and political significance without clear congressional authorization, as Massachusetts found the EPA had the authority to regulate greenhouse gases, rendering the doctrine inapplicable. Petitioners sought to vacate the 2026 rule, reinstate the Endangerment Finding and associated standards, and remand the matter to the EPA for further proceedings.

On March 20, 2026, and April 13, 2026, the court consolidated this case with six other cases (26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061). On March 20, 2026, the Truck and Engine Manufacturers Association, the National Federation of Independent Business, the American Free Enterprise Chamber of Commerce, the Illinois, Iowa, Kentucky, Missouri, North Dakota, and Tennessee Corn Growers Associations, and the American Petroleum Institute also moved to intervene as defendants. On April 13, 2026, the American Fuel & Petrochemical Manufacturers and Energy Marketers of America also filed a motion to intervene as defendants. The court granted these motions on April 22, 2026.

On April 20, 2026, a coalition of medical and environmental groups, who are plaintiffs in the consolidated cases, moved to defer a call for briefing proposals pending EPA action on administrative petitions, or, in the alternative, to sever the issues filed by these plaintiffs.

On May 20, 2026, the Parents of Minor Youth Petitioners lodged a motion to stay the underlying order pending the appeal. The same day, the from multiple consolidated cases filed a joint motion to complete the record, requesting the court add missing evidence to the case.

On May 22, 2026, a coalition of defendants filed a motion to extend the time to file a motion.

On June 17, 2026, the court lodged the motion for stay pending appeal, formally submitteding it to the court clerk for processing and review.

This case remains ongoing.

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Summary Authors

Madeline Dollard (6/18/2026)

People

For PACER's information on parties and their attorneys, see: https://www.courtlistener.com/docket/72520673/parties/commonwealth-of-massachusetts-v-epa/

Expert/Monitor/Master/Other

Abrahamson, Jacob M. (District of Columbia)

Aquart, Nicholas Albert (District of Columbia)

Attorney, Sue Si (District of Columbia)

Attorney, Frank D. (District of Columbia)

Attorney, Andrea Rodgers, (District of Columbia)

Other

Abrahamson, Jacob M. (District of Columbia)

Aquart, Nicholas Albert (District of Columbia)

Attorney, Sue Si (District of Columbia)

Attorney, Frank D. (District of Columbia)

Attorney, Andrea Rodgers, (District of Columbia)

Attorney, James R. (District of Columbia)

Attorney, Peter Michel (District of Columbia)

Attorney, Robert Henneke, (District of Columbia)

Attorney, Megan M. (District of Columbia)

Attorney, Christopher C. (District of Columbia)

Attorney, Sarah Utley, (District of Columbia)

Attorney, Brian Hamilton (District of Columbia)

Attorney, Joshua Aries (District of Columbia)

Attorney, Jorge Benjamin (District of Columbia)

Attorney, Daniel Jacob (District of Columbia)

Attorney, C. Joshua (District of Columbia)

Attorney, Bruce A. (District of Columbia)

Axt, Philip (District of Columbia)

Baker, Alice R. (District of Columbia)

Barta, James A. (District of Columbia)

Bostrom, Michael James (District of Columbia)

Brainerd, Kristin (District of Columbia)

Brau, Joseph Aaron (District of Columbia)

Breckenridge, Tillman J. (District of Columbia)

Breiner, Kevin (District of Columbia)

Brown, Marvin C. (District of Columbia)

Buschbacher, Michael B. (District of Columbia)

Carswell, Dwight (District of Columbia)

Chhe, Soriya R. (District of Columbia)

Chiu, David S. (District of Columbia)

Clark, Zachary (District of Columbia)

Clement, Paul D. (District of Columbia)

Coglianese, Richard N. (District of Columbia)

Corrigan, Christian Brian (District of Columbia)

Corrigan, Megan (District of Columbia)

Counsel, Andres Jose (District of Columbia)

Counsel, Robert A. (District of Columbia)

Counsel, David D. (District of Columbia)

Counsel, Christopher Gene (District of Columbia)

Counsel, Jason Craig (District of Columbia)

Crowley, James T. (District of Columbia)

David, Caleb B. (District of Columbia)

Davidson, Keri Rae (District of Columbia)

DeLaquil, Mark W. (District of Columbia)

Deutsch, Elizabeth B. (District of Columbia)

DeWald, D. David (District of Columbia)

Donahue, Sean H. (District of Columbia)

Doolittle, Alexandria K. (District of Columbia)

Dornbos, William (District of Columbia)

Engel, Kirsten (District of Columbia)

Esquire, Vera P. (District of Columbia)

Esquire, Nicholas M. (District of Columbia)

Esquire, Garry M. (District of Columbia)

Esquire, Louis Joseph (District of Columbia)

Esquire, William J. (District of Columbia)

Esquire, Kris W. (District of Columbia)

French, Timothy A. (District of Columbia)

Fry, Tyler (District of Columbia)

Garrahan, Paul Andrew (District of Columbia)

General, Michael J. (District of Columbia)

General, Turner Smith, (District of Columbia)

General, Asher Paris (District of Columbia)

General, Julia Kathryn (District of Columbia)

General, Christopher Huriaux (District of Columbia)

General, Meredith Hankins, (District of Columbia)

General, Rachel Maman (District of Columbia)

General, Morgan Anna (District of Columbia)

General, Scott Norman (District of Columbia)

General, Gavin Geraghty (District of Columbia)

General, Matthew I. (District of Columbia)

General, Peter Surdo, (District of Columbia)

General, Zachary Brent (District of Columbia)

General, James Emory (District of Columbia)

General, Vanessa L. (District of Columbia)

General, Emma Akrawi, (District of Columbia)

General, Caitlan L. (District of Columbia)

General, Caroline S. (District of Columbia)

General, Lyle T. (District of Columbia)

Giovanatti, Neil (District of Columbia)

Goho, Shaun Alaric (District of Columbia)

Goldstein, Steven J. (District of Columbia)

Goldstein, Elena (District of Columbia)

Greco, Luca (District of Columbia)

Greco, Emily M. (District of Columbia)

Greenfield, Meghan (District of Columbia)

Gregor, Ashley Marie (District of Columbia)

Grossman, Andrew Michael (District of Columbia)

Hadzi-Antich, Theodore (District of Columbia)

Hardin, Matthew (District of Columbia)

Harris, Ondray Toney (District of Columbia)

Heigis, Eric William (District of Columbia)

Henderson, Alice (District of Columbia)

Heron, Rachel (District of Columbia)

Hoshijima, Tsuki (District of Columbia)

Ireland, Kiel (District of Columbia)

James, Jason E. (District of Columbia)

Jamison, Esther C. (District of Columbia)

Johnson-Karp, Gabe (District of Columbia)

Jonas-Day, Julia Erica (District of Columbia)

Jones, Stephanie Haltiner (District of Columbia)

Kasper, Myriam Zreczny (District of Columbia)

Kimelman, Atid (District of Columbia)

King, Devon (District of Columbia)

King-Clancy, Erin (District of Columbia)

Kohlruss-Reuman, Phalen (District of Columbia)

Kolman, Chloe Hamity (District of Columbia)

Kuhn, Matthew Franklin (District of Columbia)

Latimer, Laura Beth (District of Columbia)

Lewis, Jennifer L. (District of Columbia)

Lineberry, Amanda (District of Columbia)

Litigation, Yueh-Ru Chu, (District of Columbia)

Lorence, Jenna (District of Columbia)

Lucas, Brinton (District of Columbia)

Martin, Daniel Jeffrey (District of Columbia)

McCombs, Theodore (District of Columbia)

Miller, Graham (District of Columbia)

Morelli, Lisa Jo (District of Columbia)

Mueller, Kathleen Moriarty (District of Columbia)

Murdock, Marin (District of Columbia)

Nicholson, Haley (District of Columbia)

Noteboom, Carrie (District of Columbia)

Olson, Julia A. (District of Columbia)

Parker, Lauren (District of Columbia)

Patton, Vickie Lynn (District of Columbia)

Perls, Hannah (District of Columbia)

Pettit, David Richard (District of Columbia)

Purser, Stanford Edward (District of Columbia)

Raduazo, Anthony R. (District of Columbia)

Reyneveld, Sarah M. (District of Columbia)

Rhea, Gordon Campbelle (District of Columbia)

Rios-Keating, Catherine (District of Columbia)

Rosenbaum, Adina Hyman (District of Columbia)

Saltzman, Veronica (District of Columbia)

Sanders, Christopher (District of Columbia)

Sassoon, Danielle Renee (District of Columbia)

Savage, Justin A. (District of Columbia)

Sharp, Callie M. (District of Columbia)

Shulock, Nathan B. (District of Columbia)

Smyles, Maura E. (District of Columbia)

Snyder, Daniel C. (District of Columbia)

Solicitor, David M.S. (District of Columbia)

Solicitor, Justin L. (District of Columbia)

Solicitor, Alexander Barrett (District of Columbia)

Sridharan, Mathura (District of Columbia)

Stander, Robert Nolan (District of Columbia)

Starr, Elizabeth H. (District of Columbia)

Stella, Cristina R. (District of Columbia)

Sturges, Francis William (District of Columbia)

Thompson, John Henry (District of Columbia)

Tomasello, Shirley Ann (District of Columbia)

Torchinsky, Jason Brett (District of Columbia)

Tuthill, Hadley Elizabeth (District of Columbia)

Ubersax, Jeffery D. (District of Columbia)

Valdez, Glenda (District of Columbia)

Vijayan, Abirami (District of Columbia)

Vizcarra, Hana Veselka (District of Columbia)

Walters, Riley (District of Columbia)

Watson, Noah P. (District of Columbia)

Wehrum, William L. (District of Columbia)

Weldon, Chance (District of Columbia)

Wessan, Eric H. (District of Columbia)

Williams, Wesley Scott (District of Columbia)

Williams, Michael Ray (District of Columbia)

Worthington, John (District of Columbia)

Yindra, Hannah W. (District of Columbia)

Zaft, David (District of Columbia)

Zarian, Michael A. (District of Columbia)

Zieve, Allison M. (District of Columbia)

Attorney Contact Information via CourtListener

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Documents in the Clearinghouse

	Document
1208823426 26-01038	Petition for Review Venner et al. v. U.S. Environmental Protection Acency et al.	Feb. 18, 2026	Feb. 18, 2026 Pleading / Motion / Brief
1208824247 26-01039	Petition for Review Zero Emission Transportation Association v. United States Environmental Protection Agency et al.	Feb. 20, 2026	Feb. 20, 2026 Pleading / Motion / Brief
1208830073 26-01051	Petition for Review Service Employees International Union v. U.S. Environmental Protection Agency et al.	March 12, 2026	March 12, 2026 Pleading / Motion / Brief
1208830073 26-01051	Petition for Review Service Employees International Union v. U.S. Environmental Protection Agency et al.	March 12, 2026	March 12, 2026 Pleading / Motion / Brief
1208832443 26-01061	Petition for Review Commonwealth of Massachusetts et al. v. EPA et al.	March 19, 2026	March 19, 2026 Pleading / Motion / Brief
1208836692 26-01061	On Petition For Review Of An Action Of The United States Environmental Protection Agency Washington State, King County et al. v. U.S. Environmental Protection Agency	March 31, 2026	March 31, 2026 Pleading / Motion / Brief
2168456 26-1037	Brief of Senators Ted Cruz and Cynthia Lummis as Amici Curiae in Support of Respondents American Public Health Association et al. v. Environmental Protection Agency et al.	April 13, 2026	April 13, 2026 Pleading / Motion / Brief
1208858034 26-01061	Order American Public Health Association et al. v. Environmental Protection Agency et al.	June 8, 2026	June 8, 2026 Order/Opinion

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Resources

Title	Description		External URL Date / External URL
Policy Memorandum; Special Immigrant Juvenile Classification and Deferred Action	U.S. Citizenship and Immigration Services (USCIS) is issuing a policy memorandum to eliminate the 2022 policy automatically considering deferred action (and related employment authorization) for al…	April 10, 2026	April 10, 2026 https://www.uscis.gov/...

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Docket

See docket on RECAP: https://www.courtlistener.com/docket/72520673/commonwealth-of-massachusetts-v-epa/

Last updated June 27, 2026, 3:26 a.m.

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ECF Number	Description	Date	Link Date / Link
1208832443	PETITION FOR REVIEW [2164582] of a decision by federal agency filed by City and County of Denver Colorado, City and County of San Francisco, California, City of Albuquerque, New Mexico, City of Boston, Massachusetts, City of Chicago, Illinois, City of Cleveland, Ohio, City of Columbus, Ohio, City of Los Angeles, California, City of New York, New York, Commonwealth of Massachusetts, Commonwealth of Virginia, DC, Harris County, Texas, Martin Luther King Jr. County, Washington, Santa Clara County, California, Josh Shapiro, State of Arizona, State of California, State of Colorado, State of Connecticut, State of Delaware, State of Hawaii, State of Illinois, State of Maine, State of Maryland, State of Michigan, State of Minnesota, State of Nevada, State of New Jersey, State of New Mexico, State of New York, State of North Carolina, State of Oregon, State of Rhode Island, State of Vermont, State of Washington, State of Wisconsin and Virgin Islands [Service Date: 03/20/2026 ] Disclosure Statement: Not Applicable to this Party. [26-1061] [Entered: 03/20/2026 09:09 AM]	March 19, 2026	March 19, 2026 Clearinghouse
	PETITION FOR REVIEW CASE docketed. [26-1061] [Entered: 03/20/2026 08:29 AM]	March 19, 2026	March 19, 2026
1208832446	CERTIFIED COPY [2164583] of Petition for Review sent to respondent [2164582-2] [26-1061] [Entered: 03/20/2026 09:11 AM]	March 20, 2026	March 20, 2026
1208832449	LETTER [2164585] sent regarding attorney membership to Richard N. Coglianese for City of Columbus, Ohio, K. Brunetti Ireland for State of Nevada and Christopher Sanders for Martin Luther King Jr. County, Washington. Application for Admission due 04/20/2026. [26-1061] [Entered: 03/20/2026 09:15 AM]	March 20, 2026	March 20, 2026
1208832455	CLERK'S ORDER [2164588] filed consolidating cases 26-1061 (Consolidation started 03/20/2026) with 26-1037; directing party to file in 26-1061 initial submissions: PETITIONER docketing statement due 04/20/2026. PETITIONER statement of issues due 04/20/2026 [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061] [Entered: 03/20/2026 09:18 AM]	March 20, 2026	March 20, 2026
1208832591	DOCKETING STATEMENT [2164657] filed by American Public Health Association, Alliance of Nurses for Healthy Environments, American Lung Association, Center for Biological Diversity, Center for Community Action and Environmental Justice, Clean Air Council, Clean Wisconsin, Environmental Defense Fund, Environmental Law & Policy Center, Friends of the Earth, Natural Resources Defense Council, Inc., Physicians for Social Responsibility, Public Citizen, Rio Grande International Study Center, Sierra Club, Union of Concerned Scientists and Conservation Law Foundation [Service Date: 03/20/2026 ] [26-1037] (Kolman, Chloe) [Entered: 03/20/2026 12:16 PM]	March 20, 2026	March 20, 2026
1208832594	CERTIFICATE AS TO PARTIES, RULINGS AND RELATED CASES [2164659] filed by American Public Health Association, Alliance of Nurses for Healthy Environments, American Lung Association, Center for Biological Diversity, Center for Community Action and Environmental Justice, Clean Air Council, Clean Wisconsin, Conservation Law Foundation, Environmental Defense Fund, Environmental Law & Policy Center, Friends of the Earth, Natural Resources Defense Council, Inc., Physicians for Social Responsibility, Public Citizen, Rio Grande International Study Center, Sierra Club and Union of Concerned Scientists [Service Date: 03/20/2026 ] [26-1037] (Kolman, Chloe) [Entered: 03/20/2026 12:18 PM]	March 20, 2026	March 20, 2026
1208832597	STATEMENT OF ISSUES [2164663] filed by American Public Health Association, Alliance of Nurses for Healthy Environments, American Lung Association, Center for Biological Diversity, Center for Community Action and Environmental Justice, Clean Air Council, Clean Wisconsin, Conservation Law Foundation, Environmental Defense Fund, Environmental Law & Policy Center, Friends of the Earth, Natural Resources Defense Council, Inc., Physicians for Social Responsibility, Public Citizen, Rio Grande International Study Center, Sierra Club and Union of Concerned Scientists [Service Date: 03/20/2026 ] [26-1037] (Kolman, Chloe) [Entered: 03/20/2026 12:20 PM]	March 20, 2026	March 20, 2026
1208832604	UNDERLYING DECISION IN CASE [2164669] submitted by American Public Health Association, Alliance of Nurses for Healthy Environments, American Lung Association, Center for Biological Diversity, Center for Community Action and Environmental Justice, Clean Air Council, Clean Wisconsin, Conservation Law Foundation, Environmental Defense Fund, Environmental Law & Policy Center, Friends of the Earth, Natural Resources Defense Council, Inc., Physicians for Social Responsibility, Public Citizen, Rio Grande International Study Center, Sierra Club and Union of Concerned Scientists [Service Date: 03/20/2026 ] [26-1037] (Kolman, Chloe) [Entered: 03/20/2026 12:38 PM]	March 20, 2026	March 20, 2026
1208832615	CONSENT STATEMENT OF INTENT REGARDING APPENDIX DEFERRAL [2164674] filed by American Public Health Association, Alliance of Nurses for Healthy Environments, American Lung Association, Center for Biological Diversity, Center for Community Action and Environmental Justice, Clean Air Council, Clean Wisconsin, Conservation Law Foundation, Environmental Defense Fund, Environmental Law & Policy Center, Friends of the Earth, Natural Resources Defense Council, Inc., Physicians for Social Responsibility, Public Citizen, Rio Grande International Study Center, Sierra Club and Union of Concerned Scientists [Service Date: 03/20/2026 ] Intent: AppxDeferred [26-1037] (Kolman, Chloe) [Entered: 03/20/2026 12:40 PM]	March 20, 2026	March 20, 2026
1208832690	MOTION [2164718] for leave to intervene [Disclosure Listing: Attached] filed by Truck and Engine Manufacturers Association [Service Date: 03/20/2026 ] [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061]--[Edited 03/20/2026 by FAW] (Wehrum, William) [Entered: 03/20/2026 02:18 PM]	March 20, 2026	March 20, 2026
1208832699	ENTRY OF APPEARANCE [2164721] filed by Frank D. Garrison and co-counsel Tyler Fry on behalf of Movant-Intervenor for Respondent Domestic Energy Producers Alliance in 26-1037, 26-1038, 26-1039, 26-1043, 26-1051. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061] (Garrison, Frank) [Entered: 03/20/2026 02:20 PM]	March 20, 2026	March 20, 2026
1208832794	MOTION [2164781] for leave to intervene [Disclosure Listing: Not Attached] filed by National Federation of Independent Business, American Free Enterprise Chamber of Commerce, and the Illinois, Iowa, Kentucky, Missouri, North Dakota, and Tennessee Corn Growers Associations [Service Date: 03/20/2026 ] [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061]--[Edited 03/23/2026 by FAW] (Buschbacher, Michael) [Entered: 03/20/2026 04:02 PM]	March 20, 2026	March 20, 2026
1208832820	MOTION [2164792] for leave to intervene [Disclosure Listing: Attached] filed by NACCO Natural Resources Corporation [Service Date: 03/20/2026 ] [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061]--[Edited 03/23/2026 by FAW] (Lucas, Brinton) [Entered: 03/20/2026 04:43 PM]	March 20, 2026	March 20, 2026
1208832832	MOTION [2164799] for leave to intervene [Disclosure Listing: Attached] filed by CO2 Coalition [Service Date: 03/20/2026 ] [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061]--[Edited 03/23/2026 by FAW] (Grossman, Andrew) [Entered: 03/20/2026 05:09 PM]	March 20, 2026	March 20, 2026
1208832917	MOTION [2164843] for leave to intervene [Disclosure Listing: Attached] filed by American Petroleum Institute [Service Date: 03/20/2026 ] [26-1037]--[Edited 03/23/2026 by FAW] (Clement, Paul) [Entered: 03/20/2026 09:39 PM]	March 20, 2026	March 20, 2026
1208833254	ENTRY OF APPEARANCE [2165032] filed by Brinton Lucas and co-counsel S. Matthew Krsacok; Jeffrey D. Ubersax on behalf of Movant-Intervenor for Respondent NACCO Natural Resources Corporation in 26-1037. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061] (Lucas, Brinton) [Entered: 03/23/2026 01:39 PM]	March 23, 2026	March 23, 2026
1208833511	RESPONSE IN OPPOSITION [2165141] to motion to extend time [2163614-2] filed by EPA and Lee M. Zeldin in 26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061 [Service Date: 03/23/2026 by CM/ECF NDA] Length Certification: 976 words. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061] (Chen, Sue) [Entered: 03/23/2026 06:02 PM]	March 23, 2026	March 23, 2026
1208833590	DOCKETING STATEMENT [2165170] filed by J.G., C.E., E.S., J.K., L.D. and R.D., L.R.F., Ariela Lara, Linnea Lentfer, M.B., M.D., Katherine McIntosh, N.G., N.N., Taylin Nishida, Elena Venner, Emma Weibel and Maya Williams in 26-1038 [Service Date: 03/23/2026 ] [26-1038, 26-1037, 26-1039, 26-1043, 26-1051, 26-1061] (Olson, Julia) [Entered: 03/23/2026 10:51 PM]	March 23, 2026	March 23, 2026
1208833599	STATEMENT OF ISSUES [2165173] filed by C.E., E.S., J.G., J.K., L.D. and R.D., L.R.F., Ariela Lara, Linnea Lentfer, M.B., M.D., N.G., N.N., Taylin Nishida, Elena Venner, Emma Weibel, Maya Williams and Katherine McIntosh in 26-1038 [Service Date: 03/23/2026 ] [26-1038, 26-1037, 26-1039, 26-1043, 26-1051, 26-1061] (Olson, Julia) [Entered: 03/23/2026 11:05 PM]	March 23, 2026	March 23, 2026
1208834396	ENTRY OF APPEARANCE [2165638] filed by Meghan Greenfield and co-counsel Elizabeth Deutsch, Elizabeth Starr, Maura Smyles on behalf of Petitioner Business Climate Initiative Action in 26-1039. [26-1037, 26-1039] (Greenfield, Meghan) [Entered: 03/25/2026 04:25 PM]	March 25, 2026	March 25, 2026
1208834409	NOTICE [2165643] to change party information filed by Business Climate Initiative Action in 26-1039 [Service Date: 03/25/2026 ] [26-1037, 26-1039] (Greenfield, Meghan) [Entered: 03/25/2026 04:47 PM]	March 25, 2026	March 25, 2026
1208834423	DOCKETING STATEMENT [2165648] filed by Business Climate Initiative Action in 26-1039 [Service Date: 03/25/2026 ] [26-1037, 26-1039] (Greenfield, Meghan) [Entered: 03/25/2026 04:59 PM]	March 25, 2026	March 25, 2026
1208834434	STATEMENT OF ISSUES [2165653] filed by Business Climate Initiative Action in 26-1039 [Service Date: 03/25/2026 ] [26-1037, 26-1039] (Greenfield, Meghan) [Entered: 03/25/2026 05:18 PM]	March 25, 2026	March 25, 2026
1208835197	DOCKETING STATEMENT [2165996] filed by Metropolitan Congregations United for St. Louis and Missouri Coalition for the Environment in 26-1043 [Service Date: 03/27/2026 ] [26-1037, 26-1043] (Morrison, Bruce) [Entered: 03/27/2026 04:42 PM]	March 27, 2026	March 27, 2026
1208835211	STATEMENT OF ISSUES [2165999] filed by Metropolitan Congregations United for St. Louis and Missouri Coalition for the Environment in 26-1043 [Service Date: 03/27/2026 ] [26-1037, 26-1043] (Morrison, Bruce) [Entered: 03/27/2026 04:44 PM]	March 27, 2026	March 27, 2026
1208835635	NOTICE [2166199] Notice of Consent to Extension Motion filed by Elena Venner, E.S., C.E., J.G., J.K., L.D. and R.D., L.R.F., Ariela Lara, Linnea Lentfer, M.B., M.D., Katherine McIntosh, N.G., N.N., Taylin Nishida, Emma Weibel and Maya Williams in 26-1038 [Service Date: 03/30/2026 ] [26-1038, 26-1037, 26-1039, 26-1043, 26-1051, 26-1061] (Nicholson, Haley) [Entered: 03/30/2026 05:00 PM]	March 30, 2026	March 30, 2026
1208835666	REPLY [2166208] filed by American Public Health Association, Alliance of Nurses for Healthy Environments, American Lung Association, Center for Biological Diversity, Center for Community Action and Environmental Justice, Clean Air Council, Clean Wisconsin, Conservation Law Foundation, Environmental Defense Fund, Environmental Law & Policy Center, Friends of the Earth, Natural Resources Defense Council, Inc., Physicians for Social Responsibility, Public Citizen, Rio Grande International Study Center, Sierra Club and Union of Concerned Scientists to response [2165141-2] [Service Date: 03/30/2026 by Email, CM/ECF NDA] Length Certification: 1,598 words. [26-1037] (Kolman, Chloe) [Entered: 03/30/2026 06:32 PM]	March 30, 2026	March 30, 2026
1208836283	MOTION [2166511] for leave to file reply filed by John Worthington in 26-1037, 26-1038, 26-1039, 26-1043 (Service Date: 04/01/2026 by CM/ECF NDA, Clerk) Length Certification: 1 page. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061] [Entered: 04/01/2026 10:58 AM]	March 30, 2026	March 30, 2026
1208836291	CORRECTED REPLY [2166515] lodged by John Worthington in 26-1037, 26-1038, 26-1039, 26-1043 to response [2163207-2] [Service Date: 04/01/2026 by Clerk, CM/ECF NDA] Length Certification: 8 pages. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061] [Entered: 04/01/2026 11:03 AM]	March 30, 2026	March 30, 2026
1208836297	MOTION [2166517] for summary judgment lodged by John Worthington in 26-1037, 26-1038, 26-1039, 26-1043 (Service Date: 04/01/2026 by CM/ECF NDA, Clerk) Length Certification: 7 pages. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061] [Entered: 04/01/2026 11:07 AM]	March 30, 2026	March 30, 2026
1208836306	SUPPLEMENT [2166520] to motion for judicial notice [2164059-2] lodged by John Worthington in 26-1037, 26-1038, 26-1039, 26-1043 [Service Date: 04/01/2026 ] [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061] [Entered: 04/01/2026 11:13 AM]	March 30, 2026	March 30, 2026
1208835889	CLERK'S ORDER [2166312] filed granting motion to participate as amicus curiae [2164476-2] in 26-1037, 26-1038, 26-1039, 26-1043, 26-1051; The Clerk is directed to file Amicus brief [2164479-2] in 26-1037, 26-1038, 26-1039, 26-1043, 26-1051 [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061] [Entered: 03/31/2026 01:03 PM]	March 31, 2026	March 31, 2026 RECAP
1208836196	ENTRY OF APPEARANCE [2166467] filed by Paul D. Clement and co-counsel Danielle R. Sassoon and Nicholas A. Aquart on behalf of Movant-Intervenor for Respondent American Petroleum Institute in 26-1037. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061] (Clement, Paul) [Entered: 03/31/2026 10:55 PM]	March 31, 2026	March 31, 2026
1208836303	NOTICE [2166519] lodged by John Worthington in 26-1037, 26-1038, 26-1039, 26-1043 [Service Date: 04/01/2026 ] [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061] [Entered: 04/01/2026 11:09 AM]	March 31, 2026	March 31, 2026
1208836689	MOTION [2166704] for leave to file amicus brief filed by John Worthington in 26-1037, 26-1038, 26-1039, 26-1043 (Service Date: 04/02/2026 by CM/ECF NDA, Clerk) Length Certification: 5 pages. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061] [Entered: 04/02/2026 09:30 AM]	March 31, 2026	March 31, 2026
1208836692	AMICUS FOR RESPONDENT BRIEF [2166706] lodged by John Worthington in 26-1037, 26-1038, 26-1039, 26-1043 [Service Date: 04/02/2026 ] Length of Brief: 109 pages. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061] [Entered: 04/02/2026 09:37 AM]	March 31, 2026	March 31, 2026 Clearinghouse
1208836695	MOTION [2166708] for summary disposition correcting motion for summary judgment lodged by John Worthington in 26-1037, 26-1038, 26-1039, 26-1043 (Service Date: 04/02/2026 by CM/ECF NDA, Clerk) Length Certification: 8 pages. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061] [Entered: 04/02/2026 09:40 AM]	March 31, 2026	March 31, 2026
	PER ABOVE ORDER lodged Amicus brief [2164479-2] is filed [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061] [Entered: 03/31/2026 01:11 PM]	March 31, 2026	March 31, 2026
1208838719	NOTICE [2167713] lodged by John Worthington in 26-1037, 26-1038, 26-1039, 26-1043 [Service Date: 04/09/2026 ] [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061] [Entered: 04/09/2026 09:33 AM]	April 3, 2026	April 3, 2026
1208838148	ENTRY OF APPEARANCE [2167439] filed by K. Brunetti Ireland on behalf of Petitioner State of Nevada in 26-1061. [26-1061, 26-1037, 26-1038, 26-1039, 26-1043, 26-1051] (Ireland, Kiel) [Entered: 04/07/2026 12:46 PM]	April 7, 2026	April 7, 2026
1208838916	ENTRY OF APPEARANCE [2167812] filed by Hadley Tuthill on behalf of Petitioner State of Michigan in 26-1061. [26-1061, 26-1037, 26-1038, 26-1039, 26-1043, 26-1051] (Tuthill, Hadley) [Entered: 04/09/2026 03:38 PM]	April 9, 2026	April 9, 2026
1208840020	CLERK'S ORDER [2168319] filed consolidating cases 26-1083 (Consolidation started 04/13/2026) with 26-1037; directing party to file initial submissions: PETITIONER docketing statement due 05/13/2026. PETITIONER statement of issues due 05/13/2026 [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083] [Entered: 04/13/2026 01:11 PM]	April 13, 2026	April 13, 2026 RECAP
1208840218	ENTRY OF APPEARANCE [2168412] filed by William Seidleck on behalf of Movant-Intervenor for Respondent State of Missouri. [26-1037] (Seidleck, William) [Entered: 04/13/2026 04:13 PM]	April 13, 2026	April 13, 2026
1208840225	ENTRY OF APPEARANCE [2168421] filed by Graham Miller on behalf of Movant-Intervenor for Respondent State of Missouri. [26-1037] (Miller, Graham) [Entered: 04/13/2026 04:31 PM]	April 13, 2026	April 13, 2026
1208840234	DOCKETING STATEMENT [2168428] filed by Service Employees International Union in 26-1051 [Service Date: 04/13/2026 ] [26-1051, 26-1037] (Hoshijima, Tsuki) [Entered: 04/13/2026 04:41 PM]	April 13, 2026	April 13, 2026
1208840237	STATEMENT OF ISSUES [2168429] filed by Service Employees International Union in 26-1051 [Service Date: 04/13/2026 ] [26-1051, 26-1037] (Hoshijima, Tsuki) [Entered: 04/13/2026 04:42 PM]	April 13, 2026	April 13, 2026
1208840319	MOTION [2168454] for leave to intervene [Disclosure Listing: Not Attached] filed by American Fuel & Petrochemical Manufacturers and Energy Marketers of America [Service Date: 04/13/2026 ] [26-1061, 26-1051]--[Edited 04/14/2026 by LMM] (Feith, Daniel) [Entered: 04/13/2026 07:23 PM]	April 13, 2026	April 13, 2026
1208840324	MOTION [2168455] to participate as amicus curiae [Disclosure Listing: Attached] filed by SENATORS TED CRUZ AND CYNTHIA LUMMIS [Service Date: 04/13/2026 ] [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083]--[Edited 04/14/2026 by FAW] (Torchinsky, Jason) [Entered: 04/13/2026 07:37 PM]	April 13, 2026	April 13, 2026
1208840327	AMICUS FOR RESPONDENT FINAL BRIEF [2168456] lodged by SENATORS TED CRUZ AND CYNTHIA LUMMIS [Service Date: 04/13/2026 ] Length of Brief: 3,196 words. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083]--[Edited 04/14/2026 by FAW--MODIFIED EVENT FROM FILED TO LODGED] (Torchinsky, Jason) [Entered: 04/13/2026 07:44 PM]	April 13, 2026	April 13, 2026
1208840527	ENTRY OF APPEARANCE [2168591] filed by Daniel J. Feith and co-counsel Justin A. Savage: Kathleen Mueller on behalf of Movant-Intervenors for Respondent American Fuel & Petrochemical Manufacturers and Energy Marketers of America. [26-1061] (Feith, Daniel) [Entered: 04/14/2026 12:35 PM]	April 14, 2026	April 14, 2026
1208840530	ENTRY OF APPEARANCE [2168592] filed by Daniel J. Feith and co-counsel Justin A. Savage: Kathleen Mueller on behalf of Movant-Intervenors for Respondent American Fuel & Petrochemical Manufacturers and Energy Marketers of America. [26-1051] (Feith, Daniel) [Entered: 04/14/2026 12:36 PM]	April 14, 2026	April 14, 2026
1208840960	ENTRY OF APPEARANCE [2168804] filed by Kristin Brainerd on behalf of Petitioner City and County of Denver, Colorado in 26-1061. [26-1061, 26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1083] (Brainerd, Kristin) [Entered: 04/15/2026 01:44 PM]	April 15, 2026	April 15, 2026
1208841306	ENTRY OF APPEARANCE [2168950] filed by Richard N. Coglianese on behalf of Petitioner City of Columbus, Ohio. [26-1061] (Coglianese, Richard) [Entered: 04/16/2026 10:12 AM]	April 16, 2026	April 16, 2026
1208841433	DOCKETING STATEMENT [2169010] filed by City and County of Denver, Colorado, City and County of San Francisco, California, City of Albuquerque, New Mexico, City of Boston, Massachusetts, City of Chicago, Illinois, City of Cleveland, Ohio, City of Columbus, Ohio, City of Los Angeles, California, City of New York, New York, Commonwealth of Massachusetts, Commonwealth of Virginia, DC, Harris County, Texas, Martin Luther King Jr. County, Washington, Santa Clara County, California, Josh Shapiro, State of Arizona, State of California, State of Colorado, State of Connecticut, State of Delaware, State of Hawaii, State of Illinois, State of Maine, State of Maryland, State of Michigan, State of Minnesota, State of Nevada, State of New Jersey, State of New Mexico, State of New York, State of North Carolina, State of Oregon, State of Rhode Island, State of Vermont, State of Washington, State of Wisconsin and Virgin Islands in 26-1061 [Service Date: 04/16/2026 ] [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083] (Jonas-Day, Julia) [Entered: 04/16/2026 02:02 PM]	April 16, 2026	April 16, 2026
1208841439	STATEMENT OF ISSUES [2169012] filed by City and County of Denver, Colorado, City and County of San Francisco, California, City of Albuquerque, New Mexico, City of Boston, Massachusetts, City of Chicago, Illinois, City of Cleveland, Ohio, City of Columbus, Ohio, City of Los Angeles, California, City of New York, New York, Commonwealth of Massachusetts, Commonwealth of Virginia, DC, Harris County, Texas, Martin Luther King Jr. County, Washington, Santa Clara County, California, Josh Shapiro, State of Arizona, State of California, State of Colorado, State of Connecticut, State of Delaware, State of Hawaii, State of Illinois, State of Maine, State of Maryland, State of Michigan, State of Minnesota, State of Nevada, State of New Jersey, State of New Mexico, State of New York, State of North Carolina, State of Oregon, State of Rhode Island, State of Vermont, State of Washington, State of Wisconsin and Virgin Islands in 26-1061 [Service Date: 04/16/2026 ] [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083] (Jonas-Day, Julia) [Entered: 04/16/2026 02:17 PM]	April 16, 2026	April 16, 2026
1208841587	MOTION [2169080] Defer the call for merits briefing until June 4, 2026, pending EPA action on administrative reconsideration petitions. filed by ZETA in 26-1039, Service Employees International Union in 26-1051, Commonwealth of Massachusetts, State of California, State of New York, State of Connecticut, State of Arizona, State of Colorado, State of Delaware, State of Hawaii, State of Illinois, State of Maine, State of Maryland, State of Michigan, State of Minnesota, State of Nevada, State of New Jersey, State of New Mexico, State of North Carolina, State of Oregon, Josh Shapiro, State of Rhode Island, State of Vermont, Commonwealth of Virginia, State of Washington, State of Wisconsin, DC, Virgin Islands, City of Albuquerque, New Mexico, City of Boston, Massachusetts, City of Chicago, Illinois, City of Cleveland, Ohio, City of Columbus, Ohio, City and County of Denver, Colorado, Harris County, Texas, City of Los Angeles, California, Martin Luther King Jr. County, Washington, City of New York, New York, City and County of San Francisco, California and Santa Clara County, California in 26-1061 (Service Date: 04/16/2026 by Email, CM/ECF NDA) Length Certification: 4,314 Words. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083] (Perls, Hannah) [Entered: 04/16/2026 09:52 PM]	April 16, 2026	April 16, 2026
1208841773	ENTRY OF APPEARANCE [2169182] filed by Rachel Heron and co-counsel Joseph Brau, Atid B. Kimelman, Gavin G. McCabe, Glenda Valdez, Abirami Vijayan on behalf of Petitioner Natural Resources Defense Council, Inc. in 26-1037. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083] (Heron, Rachel) [Entered: 04/17/2026 12:58 PM]	April 17, 2026	April 17, 2026
1208842590	MOTION [2169572] defer call for briefing proposals pending EPA action on administrative petitions, or, in the alternative, to sever issue filed by Alliance of Nurses for Healthy Environments, American Lung Association, American Public Health Association, Center for Biological Diversity, Center for Community Action and Environmental Justice, Clean Air Council, Clean Wisconsin, Conservation Law Foundation, Environmental Defense Fund, Environmental Law & Policy Center, Friends of the Earth, Natural Resources Defense Council, Inc., Physicians for Social Responsibility, Public Citizen, Rio Grande International Study Center, Sierra Club, Union of Concerned Scientists and American Free Enterprise Chamber of Commerce in 26-1037 (Service Date: 04/20/2026 by Email, CM/ECF NDA) Length Certification: 4,665 words. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083, 26-1090] (Heron, Rachel) [Entered: 04/20/2026 06:15 PM]	April 20, 2026	April 20, 2026
1208843244	[VACATED IN PART BY ORDER FILED 4/22/26] CLERK'S ORDER [2169888] filed granting motions for leave to intervene [2162369-2], [2162506-2], [2164415-2], [2164542-2], [2164718-2], [2164781-2], [2164792-2], [2164799-2], [2164843-2] in 26-1037 [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083, 26-1090] [Entered: 04/22/2026 03:33 PM]	April 22, 2026	April 22, 2026
1208843267	ENTRY OF APPEARANCE [2169901] filed by Michael R. Williams and co-counsel Caleb B. David on behalf of Intervenor for Respondent State of West Virginia. [26-1037] (David, Caleb) [Entered: 04/22/2026 04:08 PM]	April 22, 2026	April 22, 2026
1208843340	CLERK'S ORDER [2169930] filed, on the court's own motion, that the court's April 22, 2026 order be vacated as to the granting of the motion for leave to intervene filed by movant John Worthington. The Clerk is directed to note the docket accordingly [2169888-2]. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083, 26-1090] [Entered: 04/22/2026 05:34 PM]	April 22, 2026	April 22, 2026
1208843364	PER CURIAM ORDER [2169939] filed ORDERED that the motion for leave to file a corrected reply [2166511-2] be granted. The Clerk is directed to file the lodged corrected reply [2166515-2]. It is FURTHER ORDERED that Worthington’s motion for leave to intervene [2162369-2] be denied. It is FURTHER ORDERED that Worthington’s motion to participate as amicus curiae [2162369-2] be denied. It is FURTHER ORDERED that Worthington’s remaining motions for leave to file [2166704-2] & [2164054-2] be denied. It is FURTHER ORDERED that the motion to extend time [2163614-2] be granted. The following deadlines will now apply in these cases: Petitioners’ and Respondents’ Procedural Motions, if any due 05/20/2026. Petitioners’ and Respondents’ Dispositive Motions, if any due 06/04/2026. It is FURTHER ORDERED that the request that the parties file briefing proposals by April 27, 2026 [2165141-2] be denied and the motions to defer [2169572-2] & [2169080-2] be granted to the extent that any order directing the parties to file briefing proposals will be entered after any procedural or dispositive motions are resolved. It is FURTHER ORDERED that the alternative motion to sever [2169572-2] be denied without prejudice. Before Judges: Walker, Childs and Garcia. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083, 26-1090] [Entered: 04/22/2026 06:02 PM]	April 22, 2026	April 22, 2026
1208843427	ENTRY OF APPEARANCE [2169960] filed by Cristina Stella on behalf of Petitioner Santa Clara County, California. [26-1061] (Stella, Cristina)	April 22, 2026	April 22, 2026
1208843448	ENTRY OF APPEARANCE [2169967] filed by John Henry Thompson on behalf of Intervenor for Respondent State of Georgia. [26-1037] (Thompson, John Henry) [Entered: 04/22/2026 08:41 PM]	April 22, 2026	April 22, 2026
	PER ABOVE ORDER lodged corrected reply [2166515-2] is filed [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083, 26-1090] [Entered: 04/22/2026 06:04 PM]	April 22, 2026	April 22, 2026
1208843506	ENTRY OF APPEARANCE [2169991] filed by James A. Barta on behalf of Intervenor for Respondent State of Indiana. [26-1037] (Barta, James) [Entered: 04/23/2026 09:10 AM]	April 23, 2026	April 23, 2026
1208843512	ENTRY OF APPEARANCE [2169994] filed by David M.S. Dewhirst on behalf of Intervenor for Respondent State of Florida. [26-1037] (Dewhirst, David) [Entered: 04/23/2026 09:27 AM]	April 23, 2026	April 23, 2026
1208843517	ENTRY OF APPEARANCE [2169997] filed by Eric H. Wessan on behalf of Intervenor for Respondent State of Iowa. [26-1037] (Wessan, Eric) [Entered: 04/23/2026 09:54 AM]	April 23, 2026	April 23, 2026
1208843520	ENTRY OF APPEARANCE [2169998] filed by Mathura J. Sridharan on behalf of Intervenor for Respondent State of Ohio. [26-1037] (Sridharan, Mathura) [Entered: 04/23/2026 09:58 AM]	April 23, 2026	April 23, 2026
1208843538	ENTRY OF APPEARANCE [2170005] filed by Dwight R. Carswell on behalf of Intervenor for Respondent State of Kansas. [26-1037] (Carswell, Dwight) [Entered: 04/23/2026 10:32 AM]	April 23, 2026	April 23, 2026
1208843541	ENTRY OF APPEARANCE [2170006] filed by A. Barrett Bowdre on behalf of Intervenor for Respondent State of Alabama. [26-1037] (Bowdre, Alexander) [Entered: 04/23/2026 10:34 AM]	April 23, 2026	April 23, 2026
1208843544	ENTRY OF APPEARANCE [2170007] filed by D. David DeWald on behalf of Movant-Intervenor for Respondent State of Wyoming. [26-1037] (DeWald, D.) [Entered: 04/23/2026 10:36 AM]	April 23, 2026	April 23, 2026
1208843561	ENTRY OF APPEARANCE [2170015] filed by Michael Buschbacher and co-counsel James R. Conde on behalf of Intervenors for Respondent American Free Enterprise Chamber of Commerce, National Federation of Independent Business, Illinois Corn Growers Association, Kentucky Corn Growers Association, Missouri Corn Growers Association, Tennessee Corn Growers Association, North Dakota Corn Growers Associations and Iowa Corn Growers Association in 26-1037. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083, 26-1090] (Conde, James) [Entered: 04/23/2026 11:04 AM]	April 23, 2026	April 23, 2026
1208843568	ENTRY OF APPEARANCE [2170016] filed by Emily M. Greco on behalf of Intervenor for Respondent State of South Dakota. [26-1037] (Greco, Emily) [Entered: 04/23/2026 11:05 AM]	April 23, 2026	April 23, 2026
1208843573	ENTRY OF APPEARANCE [2170018] filed by Justin L. Matheny on behalf of Intervenor for Respondent State of Mississippi. [26-1037] (Matheny, Justin) [Entered: 04/23/2026 11:09 AM]	April 23, 2026	April 23, 2026
1208843590	ENTRY OF APPEARANCE [2170026] filed by Wesley S. Williams on behalf of Intervenor for Respondent State of Texas. [26-1037] (Williams, Wesley) [Entered: 04/23/2026 11:53 AM]	April 23, 2026	April 23, 2026
1208843621	ENTRY OF APPEARANCE [2170042] filed by Zachary B. Pohlman on behalf of Intervenor for Respondent State of Nebraska. [26-1037] (Pohlman, Zachary) [Entered: 04/23/2026 12:35 PM]	April 23, 2026	April 23, 2026
1208843624	ENTRY OF APPEARANCE [2170043] filed by Matthew F. Kuhn and co-counsel John H. Heyburn; Jacob M. Abrahamson on behalf of Intervenor for Respondent Commonwealth of Kentucky. [26-1037] (Abrahamson, Jacob) [Entered: 04/23/2026 12:39 PM]	April 23, 2026	April 23, 2026
1208843632	ENTRY OF APPEARANCE [2170047] filed by James Emory Smith, Jr. on behalf of Movant-Intervenor for Respondent State of South Carolina. [26-1037] (Smith, James) [Entered: 04/23/2026 12:49 PM]	April 23, 2026	April 23, 2026
1208843699	ENTRY OF APPEARANCE [2170075] filed by Hana V. Vizcarra and co-counsel Amanda Lineberry, Kevin Breiner on behalf of Petitioners Center for Community Action and Environmental Justice, Clean Air Council, Friends of the Earth, Physicians for Social Responsibility, Rio Grande International Study Center and Union of Concerned Scientists in 26-1037. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083, 26-1090] (Vizcarra, Hana) [Entered: 04/23/2026 01:34 PM]	April 23, 2026	April 23, 2026
1208843720	ENTRY OF APPEARANCE [2170084] filed by Hana V. Vizcarra and co-counsel Amanda Lineberry, Kevin Breiner on behalf of Petitioners Alaska Institute for Justice, Chesapeake Bay Foundation, Chinik Eskimo Community, Native Village of Kwinhagak, Native Village of Nunapitchuk, Northeast Organic Farming Association of New York, WE ACT, West Virginia Highlands Conservancy and Wyoming Outdoor Council in 26-1083. [26-1083, 26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1090] (Vizcarra, Hana) [Entered: 04/23/2026 01:42 PM]	April 23, 2026	April 23, 2026
1208844142	ENTRY OF APPEARANCE [2170300] filed by Zachary R. Clark on behalf of Intervenor for Respondent State of Tennessee in 26-1037. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083, 26-1090] (Clark, Zachary) [Entered: 04/24/2026 12:10 PM]	April 24, 2026	April 24, 2026
1208844215	ENTRY OF APPEARANCE [2170339] filed by Brian H. Lynk and co-counsel Callie M. Sharp on behalf of Petitioner Environmental Law & Policy Center in 26-1037, Petitioners Hoosier Environmental Council, Illinois Environmental Council, Iowa Environmental Council, Minnesota Environmental Partnership and Ohio Environmental Council in 26-1083. [26-1037, 26-1083] (Lynk, Brian) [Entered: 04/24/2026 01:38 PM]	April 24, 2026	April 24, 2026
1208844224	ENTRY OF APPEARANCE [2170342] filed by Jenna Lorence on behalf of Intervenor for Respondent State of Alaska. [26-1037] (Lorence, Jenna) [Entered: 04/24/2026 01:47 PM]	April 24, 2026	April 24, 2026
1208844233	ENTRY OF APPEARANCE [2170347] filed by Garry M. Gaskins, II and co-counsel Jennifer Lewis on behalf of Intervenor for Respondent State of Oklahoma. [26-1037] (Gaskins, Garry) [Entered: 04/24/2026 02:00 PM]	April 24, 2026	April 24, 2026
1208844405	ENTRY OF APPEARANCE [2170447] filed by Andrea K. Rodgers on behalf of Petitioners C.E., E.S., J.G., J.K., L.D. and R.D., L.R.F., Ariela Lara, Linnea Lentfer, Maya Williams, Taylin Nishida, M.B., M.D., Katherine McIntosh, N.G., N.N., Emma Weibel and Elena Venner. [26-1038] (Rodgers, Andrea) [Entered: 04/24/2026 05:21 PM]	April 24, 2026	April 24, 2026
1208844803	RESPONSE [2170630] to motion for other relief [2169080-2] lodged by John Worthington [Service Date: 04/27/2026 by CM/ECF NDA] Length Certification: 6 pages. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083, 26-1090]--[Edited 04/28/2026 by FAW--MODIFIED EVENT FROM FILED TO LODGED] [Entered: 04/27/2026 04:40 PM]	April 24, 2026	April 24, 2026
1208844663	ENTRY OF APPEARANCE [2170557] filed by Michael A. Zarian on behalf of Intervenor for Respondent State of Idaho. [26-1037] (Zarian, Michael) [Entered: 04/27/2026 12:35 PM]	April 27, 2026	April 27, 2026
1208845501	RESPONSE [2170998] to motion for other relief [2169572-2] lodged by John Worthington [Service Date: 04/29/2026 by Clerk, CM/ECF NDA] Length Certification: 6 pages. [26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083, 26-1090] [Entered: 04/29/2026 11:36 AM]	April 27, 2026	April 27, 2026
1208845771	ENTRY OF APPEARANCE [2171134] filed by Erin Doran and co-counsel Tarah Heinzen on behalf of Petitioner Food & Water Watch in 26-1083. [26-1083, 26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1090] (Doran, Erin) [Entered: 04/29/2026 04:18 PM]	April 29, 2026	April 29, 2026
1208848752	NOTICE [2172681] to withdraw attorney James Matthew Rice who represented State of Tennessee in 26-1037 filed by State of Tennessee [Service Date: 05/11/2026 ] [26-1037] (Rice, James) [Entered: 05/11/2026 10:54 AM]	May 11, 2026	May 11, 2026
1208849863	DOCKETING STATEMENT [2173222] filed by Alaska Institute for Justice, Chinik Eskimo Community, Native Village of Kwinhagak, Native Village of Nunapitchuk, Northeast Organic Farming Association of New York, West Virginia Highlands Conservancy, Wyoming Outdoor Council, Hoosier Environmental Council, Illinois Environmental Council, Iowa Environmental Council, Minnesota Environmental Partnership, Ohio Environmental Council, Food & Water Watch, Chesapeake Bay Foundation and WE ACT in 26-1083 [Service Date: 05/13/2026 ] [26-1083, 26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1090] (Vizcarra, Hana) [Entered: 05/13/2026 05:34 PM]	May 13, 2026	May 13, 2026
1208849872	STATEMENT OF ISSUES [2173225] filed by Alaska Institute for Justice, Chesapeake Bay Foundation, Chinik Eskimo Community, Native Village of Kwinhagak, Native Village of Nunapitchuk, Northeast Organic Farming Association of New York, WE ACT, West Virginia Highlands Conservancy, Wyoming Outdoor Council, Hoosier Environmental Council, Illinois Environmental Council, Iowa Environmental Council, Minnesota Environmental Partnership, Ohio Environmental Council and Food & Water Watch in 26-1083 [Service Date: 05/13/2026 ] [26-1083, 26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1090] (Vizcarra, Hana) [Entered: 05/13/2026 05:41 PM]	May 13, 2026	May 13, 2026
1208850302	MOTION [2173467] to exceed word limits in motion filed by C.E., E.S., J.G., J.K., L.D. and R.D., L.R.F., Ariela Lara, Linnea Lentfer, M.B., M.D., Katherine McIntosh, N.G., N.N., Taylin Nishida, Elena Venner, Emma Weibel and Maya Williams (Service Date: 05/14/2026 by CM/ECF NDA) Length Certification: 597 Words. [26-1038] (Nicholson, Haley) [Entered: 05/14/2026 04:03 PM]	May 14, 2026	May 14, 2026
1208851044	DOCKETING STATEMENT [2173841] filed by Bay Area Air Quality Management District in 26-1090 [Service Date: 05/18/2026 ] [26-1090, 26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083] (Jefferson, Jamie) [Entered: 05/18/2026 01:46 PM]	May 18, 2026	May 18, 2026
1208851050	STATEMENT OF ISSUES [2173848] filed by Bay Area Air Quality Management District in 26-1090 [Service Date: 05/18/2026 ] [26-1090, 26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1061, 26-1083] (Jefferson, Jamie) [Entered: 05/18/2026 01:54 PM]	May 18, 2026	May 18, 2026
1208851284	NOTICE [2173973] to substitute attorney Christopher G. King substituted by Alice R. Baker filed by City of New York, New York in 26-1061 [Service Date: 05/18/2026 ] [26-1061, 26-1037, 26-1038, 26-1039, 26-1043, 26-1051, 26-1083, 26-1090] (Baker, Alice) [Entered: 05/18/2026 08:49 PM]	May 18, 2026	May 18, 2026
1208851553	ENTRY OF APPEARANCE [2174156] filed by Philip Axt on behalf of Intervenor for Respondent State of North Dakota. [26-1037] (Axt, Philip) [Entered: 05/19/2026 03:38 PM]	May 19, 2026	May 19, 2026
1208851578	ENTRY OF APPEARANCE [2174165] filed by Noah P. Watson on behalf of Intervenor for Respondent State of Arkansas. [26-1037] (Watson, Noah) [Entered: 05/19/2026 04:25 PM]	May 19, 2026	May 19, 2026

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Case Details

State / Territory:

District of Columbia

Case Type(s):

Environmental Justice

Special Collection(s):

Trump Administration 2.0: Challenges to the Government

Environmental Protections

Trump Administration 2.0: Reversing Course on Existing Litigation

Environmental Justice

Key Dates

Filing Date: March 19, 2026

Case Ongoing: Yes

Plaintiffs

Plaintiff Description:

State, territorial, county, and municipal governments challenging EPA’s rescission of the 2009 greenhouse-gas endangerment finding and repeal of greenhouse-gas emission standards for motor vehicles and engines.

Plaintiff Type(s):

State Plaintiff

Public Interest Lawyer: No

Filed Pro Se: No

Class Action Sought: No

Class Action Outcome: Not sought

Defendants

Federal

United States Environmental Protection Agency (EPA)

Defendant Type(s):

Jurisdiction-wide

Case Details

Causes of Action:

Administrative Procedure Act, 5 U.S.C. §§ 551 et seq.

Clean Air Act, 42 U.S.C. §7401 et seq.

Other Dockets:

U.S. Court of Appeals for the District of Columbia Circuit 26-01061

U.S. Court of Appeals for the District of Columbia Circuit 26-1037

U.S. Court of Appeals for the District of Columbia Circuit 26-01038

U.S. Court of Appeals for the District of Columbia Circuit 26-01039

U.S. Court of Appeals for the District of Columbia Circuit 26-01043

U.S. Court of Appeals for the District of Columbia Circuit 26-01051

Special Case Type(s):

Appellate Court is initial court

Available Documents:

Complaint (any)

Trial Court Docket

Outcome

Prevailing Party: None Yet / None

Relief Sought:

Declaratory judgment

Injunction

Stay of government action

Relief Granted:

None yet

Source of Relief:

None yet

Recommended Citation

Case Summary of Commonwealth of Massachusetts v. EPA, Civil Rights Litig. Clearinghouse, https://clearinghouse.net/case/48131/ (last updated 6/18/2026).