SB 358 Montana Senate · 2025 Regular Session

Revise exempt water right laws

SB 358 would have revised Montana's groundwater permitting rules, primarily by clarifying when permits are required for well use. It set specific limits for exempt uses: 20 gallons per minute or 2 acre-feet annually for non-permitted wells in the Rye Creek zone, and 35 gallons per minute or 10 acre-feet annually for most other parcels (with combined wells requiring permits). The bill also required well owners in chronically dewatered areas to install monitoring devices within two years and added reporting rules for groundwater use. However, the bill died in committee in May 2025 and never became law.
Bill status died 3 of 5 stages cleared
Introduction
Feb 2025
Committee Review
Mar 2025
Senate Passage
Apr 2025
House Passage
Governor
Introduced Feb 18, 2025 Last action May 23, 2025
Maddy AI version diff · 5 comparisons

What changed between versions

SB0358_1(3).pdf SB0358_2(1).pdf · 5 edits
MODERATE
The bill was renumbered from SB 358 to SB 358.2 and its summary was updated to reflect a shift in focus from general department duties to specific requirements for identifying and regulating certain wells. The core text regarding fees, rules, and permit exceptions remains largely unchanged, though the summary now highlights enforcement mechanisms and reporting requirements as key components.
Scope change
The bill's scope was narrowed in its summary to focus specifically on the identification of certain wells and enforcement mechanisms, rather than the broader range of department duties previously listed.
SCOPE

The bill number changed from SB 358 to SB 358.2, indicating a revision or renumbering of the legislation.

The summary of the bill was rewritten to emphasize the identification of specific wells, enforcement mechanisms, and reporting requirements, replacing the previous focus on general department powers and rulemaking authority.

REQUIREMENT

The summary now explicitly mentions 'requiring the identification of certain wells,' suggesting a new or emphasized obligation for the department to identify specific wells for regulation.

The summary now includes 'providing reporting requirements,' highlighting a new or emphasized duty for stakeholders to report specific data to the department.

ENFORCEMENT

The summary was updated to include 'providing enforcement mechanisms,' indicating a stronger focus on how the law will be enforced compared to the previous version.

Floor votes · Senate Apr 2, 2025

How they voted

3515
Passed
Total votes 50
Apr 2, 2025
D Democratic18
9 Yea 9 Nay
50% Nay
R Republican32
26 Yea 6 Nay
81% Yea
Vote distribution
All Yea All Nay Mixed No data
Full legislative history

Actions timeline

Total actions
24
Key actions
3
Committee
3
Apr 2, 2025
Senate · Passed
Senate Vote: pass (35-15)
senate
Mar 31, 2025
Upper · Passed
(S) Committee Report - (S) Natural Resources
upper
Mar 28, 2025
Upper · Passed
(S) Committee Executive Action - (S) Natural Resources
upper
Feb 21, 2025
Committee
(S) Referred to Committee - (S) Natural Resources
upper
Feb 18, 2025
Introduced
(S) Introduced
upper
1 primary · 0 co-sponsors

Sponsors

Role
Legislator
Party
State
District
P
Photo of Wylie Galt
Wylie Galt
RRepublican
MT
39