Rulemaking Amendments
SB 234 amends Utah's rulemaking laws to require state agencies to base environmental health and waste management rules on scientific evidence and prevent them from creating rules stricter than federal standards. It defines key terms like "best available science" and "weight of scientific evidence," and specifies that rules affecting drinking water, air quality, hazardous waste, or solid waste handling must align with federal regulations. The bill directly affects Utah state agencies responsible for drafting and implementing environmental regulations, such as the Department of Environmental Quality. It does not appropriate funds or create new taxes, focusing solely on procedural requirements for rulemaking.
Bill status
signed
all 5 stages cleared
Introduction
Feb 2026
Committee Review
Feb 2026
Senate Passage
Mar 2026
House Passage
Mar 2026
Signed into Law
Mar 2026
Introduced Feb 3, 2026
Signed Mar 26, 2026
Maddy AI version diff · 3 comparisons
What changed between versions
Substitute #2
→
Enrolled
·
5 edits
·
Mar 26, 2026
MODERATE
This bill enacts a 'sound science' requirement for Utah rules concerning environmental health and waste management, ensuring state standards do not exceed federal regulations unless backed by robust scientific evidence. It defines specific terms like 'best available science' and establishes strict criteria for when agencies can set numeric limits on pollutants. The changes also clarify exemptions for rules required by federal law or those made on a site-specific basis.
Scope change
The bill expands the scope by creating a new substantive requirement (Section 63G-3-306) that applies specifically to rules involving environmental health and waste management, while amending existing definitions to support this new standard.
REQUIREMENT
Added a new 'sound science requirement' prohibiting agencies from setting state numeric limits for pollutants that are stricter than federal standards unless supported by the best available science.
Established that rules protecting human health must show a direct causal link between exposure and actual physical injury, not just increased risk.
DEFINITION
Added detailed definitions for 'best available science,' 'weight of scientific evidence,' 'manifest bodily harm,' and 'rule involving environmental health and waste management.'
Amended the definitions section to include new terms and renumbered existing definitions to accommodate the additions.
EXEMPTIONS
Created specific exemptions for rules required by federal law, site-specific rules, and emergency rules.
Floor votes · Senate Feb 23, 2026 · House Mar 5, 2026
How they voted
20–7
Passed · 2 other
Total votes 29
Feb 23, 2026
D
Democratic6
100% Nay
N
Forward1
100% Nay
R
Republican22
90% Yea
Vote distribution
All Yea
All Nay
Mixed
No data
Full legislative history
Actions timeline
Total actions
48
Key actions
9
Committee
6
Mar 26, 2026
Signed into law
Governor Signed
executive
Mar 6, 2026
Upper · Passed
Senate/ signed by President/ sent for enrolling
upper
Mar 5, 2026
Upper · Passed
House/ signed by Speaker/ returned to Senate
upper
Mar 5, 2026
Lower · Passed
House/ passed 3rd reading
lower
Feb 27, 2026
Lower · Passed
House/ committee report favorable [House Public Utilities and Energy Committee]
lower
Feb 27, 2026
Lower · Passed
House Comm - Favorable Recommendation [House Public Utilities and Energy Committee]
lower
Feb 25, 2026
Committee
House/ to standing committee [House Public Utilities and Energy Committee]
lower
Feb 24, 2026
Introduced
House/ 1st reading (Introduced)
lower
Feb 23, 2026
Lower · Passed
Senate/ passed 3rd reading
lower
Feb 6, 2026
Upper · Passed
Senate/ committee report favorable [Senate Natural Resources, Agriculture, and Environment Committee]
upper
Feb 4, 2026
Upper · Passed
Senate Comm - Favorable Recommendation [Senate Natural Resources, Agriculture, and Environment Committee]
upper
Feb 3, 2026
Committee
Senate/ to standing committee [Senate Natural Resources, Agriculture, and Environment Committee]
upper
Feb 3, 2026
Introduced
Senate/ 1st reading (Introduced)
upper
1 primary · 1 co-sponsor
Sponsors
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