HB 923 Montana House · 2025 Regular Session

Revise categorical exclusions from nondegradation authorization

HB 923 directs the Montana Department of Environmental Quality (DEQ) to amend its administrative rules by January 1, 2026. This amendment will create a new categorical exclusion from nondegradation authorization requirements. This exclusion applies to areas where a county commission demonstrates it has prohibited drinking water wells and ensures absorption trenches are at least 1,000 feet from downstream high-quality surface waters. The bill also appropriates $10,000 to the DEQ to implement these rule changes and provide guidance.
Bill status signed all 5 stages cleared
Introduction
Mar 2025
Committee Review
Apr 2025
House Passage
May 2025
Senate Passage
May 2025
Signed into Law
May 2025
Introduced Mar 29, 2025 Signed May 19, 2025
Maddy AI version diff · 4 comparisons

What changed between versions

HB0923_X(2).pdf HB0923_X(3).pdf · 2 edits
MINOR
The bill makes minor formatting adjustments to the text of the rule amendment and the bill's title, while clarifying the legal language regarding the rule change. It also updates the page numbering in the footer from page 2 to page 1, likely reflecting a reorganization of the document layout.
TECHNICAL

Replaced the phrase 'The department of environmental quality' with 'The department of environmental quality' (removing a duplicate 'The') and changed 'provide for a categorical exclusion' to 'insert a new subsection (8)' for precision.

Updated the footer page number from '-2-' to '-1-' and adjusted the spacing in the title line.

Floor votes · Senate Apr 18, 2025 · House Apr 5, 2025

How they voted

491
Passed
Total votes 50
Apr 18, 2025
D Democratic18
17 Yea 1 Nay
94% Yea
R Republican32
32 Yea
100% Yea
Vote distribution
All Yea All Nay Mixed No data
Full legislative history

Actions timeline

Total actions
39
Key actions
9
Committee
6
May 13, 2025
Signed into law
(H) Signed by Governor
lower
May 6, 2025
Upper · Passed
(S) Signed by President
upper
May 2, 2025
Lower · Passed
(H) Signed by Speaker
lower
Apr 18, 2025
Senate · Passed
Senate Vote: pass (49-1)
senate
Apr 12, 2025
Upper · Passed
(S) Committee Report - (S) Natural Resources
upper
Apr 12, 2025
Upper · Passed
(S) Committee Executive Action - (S) Natural Resources
upper
Apr 7, 2025
Committee
(S) Referred to Committee - (S) Natural Resources
upper
Apr 5, 2025
House · Passed
House Vote: pass (98-0-2)
house
Apr 1, 2025
Lower · Passed
(H) Committee Report - (H) Natural Resources
lower
Apr 1, 2025
Lower · Passed
(H) Committee Executive Action - (H) Natural Resources
lower
Mar 29, 2025
Committee
(H) Referred to Committee - (H) Natural Resources
lower
Mar 29, 2025
Introduced
(H) Introduced
lower
1 primary · 0 co-sponsors

Sponsors

Role
Legislator
Party
State
District
P
Photo of Llew Jones
Llew Jones
RRepublican
MT
18