Arizona 2026 Regular Session

Arizona Senate Bill SCM1004

Introduced
1/20/26  
Report Pass
1/27/26  
Report Pass
2/2/26  
Engrossed
2/27/26  
Report Pass
3/17/26  

Caption

clean air act; EPA powers

Summary

SCM1004 is a Senate Concurrent Memorial urging the U.S. Congress to limit the authority of the federal Environmental Protection Agency, particularly with respect to regulating greenhouse gases such as carbon dioxide and methane under the Clean Air Act. The memorial recites findings that the EPA was created to reduce environmental risks, but argues that greenhouse gases are not hazardous pollutants, that there is no clear statutory authorization for EPA regulation of them, and that climate-related regulation exceeds the agency’s proper role. The memorial specifically asks Congress to clearly define the EPA’s powers and duties and to end what it describes as regulatory overreach affecting the economy. It also directs the Arizona Secretary of State to transmit copies of the memorial to congressional leadership and Arizona’s congressional delegation. As a concurrent memorial, it does not change Arizona law directly; instead, it expresses the Legislature’s position to the federal government and seeks federal action. The bill’s impact on state law is limited because it is a nonbinding legislative memorial rather than a statute. Its practical effect is political and advocacy-oriented: it places Arizona on record opposing EPA regulation of greenhouse gases and supporting a narrower interpretation of federal environmental authority. Any legal change would depend on Congress or federal courts, not on this memorial itself. The general sentiment in the legislative process appears supportive but divided. The measure advanced through both chambers and ultimately passed, but committee and floor votes show meaningful opposition, especially in the Senate Natural Resources Committee and on Senate third reading. The pattern suggests the memorial had enough support to move forward, while still drawing resistance from members who likely disagreed with its critique of EPA authority and climate regulation. The main point of contention is the bill’s underlying premise that the EPA lacks authority to regulate greenhouse gases and that such regulation violates separation of powers. Supporters frame the issue as a defense of congressional authority, economic limits, and the Supreme Court’s major questions doctrine, while opponents likely view the memorial as rejecting established federal environmental policy and the need for climate regulation. The dispute centers on federalism, administrative power, and climate policy.

Impact

SCM1004 does not amend Arizona statutes or create enforceable state regulatory changes; it is a concurrent memorial that communicates the Legislature’s position to Congress. Its effect is to formally urge federal lawmakers to narrow EPA authority, especially regarding greenhouse gas regulation under the Clean Air Act, and to transmit that request to federal and Arizona congressional officials.

Sentiment

The memorial appears to have received enough support to pass, but the vote history shows it was not unanimous and faced notable opposition in committee and on the Senate floor. Overall sentiment was favorable among supporters of limiting EPA authority, while dissent reflected disagreement over the bill’s characterization of greenhouse gases, climate science, and federal environmental regulation.

Contention

The central contention is whether the EPA has authority to regulate greenhouse gases and whether such regulation is an improper expansion of federal power. Supporters argue Congress never clearly authorized EPA climate regulation and cite the major questions doctrine and separation of powers; critics are likely to object to the memorial’s rejection of EPA authority and its broader skepticism toward climate regulation and environmental protections. The bill also implicitly divides those prioritizing economic restraint and state/federal limits from those favoring stronger federal climate policy.

Companion Bills

No companion bills found.

Previously Filed As

AZ SB1539

TPT; exemption; clean rooms

AZ HB2376

County candidates; clean elections pamphlet

AZ HB2266

Technical correction; wage board; powers

AZ HB2277

Qualified immunity; unmanned aircraft

AZ HB2733

Unmanned aircraft; qualified immunity

AZ HCR2007

Aircraft license taxes; technical correction

AZ SB1350

Unmanned aircraft; critical infrastructure prohibition

AZ SB1708

Unmanned aircraft; critical infrastructure; prohibition

AZ HB2160

Arizona office of African-American affairs

AZ SB1083

Appropriation; university of Arizona; agriculture

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