emissions; reduction credits; counties
HB 2428 clarifies jurisdiction over air pollution permits in Arizona, giving the state Department of Environmental Quality primary authority for major sources like power plants and refineries in counties without approved air plans. It allows counties to issue voluntary permits for emission reduction credits related to portable and mobile sources (like vehicles or temporary equipment). This affects local air agencies, businesses needing permits, and entities seeking to certify emission reductions under state law. The bill modifies existing permit procedures without changing pollution standards or creating new emission requirements.
Bill status
signed
all 5 stages cleared
Introduction
Jan 2026
Committee Review
Mar 2026
House Passage
Jun 2026
Senate Passage
Apr 2026
Signed into Law
Jun 2026
Introduced Jan 20, 2026
Signed Jun 4, 2026
Maddy AI version diff · 3 comparisons
What changed between versions
Senate Engrossed Version (04/07/2026)
→
Chaptered Version
·
3 edits
MINOR
The bill was formally enacted into law by the Governor and filed with the Secretary of State, transitioning from a draft version to a final chapter. The substantive text of the bill, which amends Arizona Revised Statutes regarding air pollution control, remains unchanged. The primary difference is the addition of official approval and filing dates, confirming the bill's legal status.
TECHNICAL
Added official approval date (June 4, 2026) and filing date (June 5, 2026) to finalize the bill as Chapter 93.
Removed draft headers and versioning information, such as 'Senate Engrossed Version' and 'HOUSE BILL 2428' in the header section.
Updated the title from 'HB 2428' to 'CHAPTER 93' to reflect its status as an enacted law.
Floor votes · Senate Apr 7, 2026 · House Feb 25, 2026
How they voted
29–0
Passed · 1 other
Total votes 30
Apr 7, 2026
D
Democratic13
100% Yea
R
Republican17
94% Yea
Vote distribution
All Yea
All Nay
Mixed
No data
Full legislative history
Actions timeline
Total actions
16
Key actions
9
Committee
1
Amendments
3
Jun 4, 2026
Signed into law
Signed by Governor
executive
Jun 1, 2026
Lower · Passed
PASSED
lower
Apr 9, 2026
Lower · Passed
PASSED
lower
Apr 7, 2026
Upper · Passed
PASSED
upper
Apr 7, 2026
Upper · Passed
DPA
upper
Mar 17, 2026
Upper · Passed
DP
upper
Feb 25, 2026
Lower · Passed
PASSED
lower
Feb 24, 2026
Lower · Passed
DPA
lower
Feb 3, 2026
Lower · Passed
DPA
lower
1 primary · 4 co-sponsors
Sponsors
Role
Legislator
Party
State
District
P
Gail Griffin
RRepublican
Co
David Gowan
RRepublican
Co
James Taylor
RRepublican
Co
Lupe Diaz
RRepublican
Co
Walt Blackman
RRepublican
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