Waters and water rights; metering of wells; requiring Water Resources Board provide certain allocation of groundwater; permits; requirements; measurements; effective date.
HB 4459 allows groundwater irrigation districts or conservation districts to create metering programs for farmers, enabling certified participants to apply for a five-year flexible water allocation. This directly affects farmers in participating districts who can temporarily exceed their annual water limit by up to 200% in a single year, as long as their total usage over five years stays within the basin's overall allocation. To qualify, participants must submit annual metering certifications from their district and pay an annual fee. The bill also states that exceeding the 200% annual limit or five-year total triggers penalties for unauthorized water use, as outlined in existing law.
Bill status
passed
3 of 5 stages cleared
Introduction
Feb 2026
Committee Review
Mar 2026
House Passage
Mar 2026
Senate Passage
Governor
Introduced Feb 2, 2026
Last action Apr 1, 2026
Maddy AI version diff · 4 comparisons
What changed between versions
House Committee Substitute
→
Floor (House)
·
2 edits
MINOR
The bill was converted from a House Committee Substitute draft to the official Floor version, updating the header to reflect the House of Representatives. The substantive policy content, including the groundwater allocation rules, metering requirements, and effective dates, remains unchanged.
TECHNICAL
The document header was updated to identify the version as 'House of Representatives - Floor Version' instead of the previous 'Committee Substitute' label.
Page footers were updated to reflect the new floor version identifier, while retaining the note that bold face text denotes committee amendments.
Floor votes · House Mar 11, 2026
How they voted
66–28
Passed · 6 other
Total votes 100
Mar 11, 2026
D
Democratic18
88% Yea
R
Republican82
60% Yea
Vote distribution
All Yea
All Nay
Mixed
No data
Full legislative history
Actions timeline
Total actions
15
Key actions
5
Committee
4
Amendments
1
Mar 12, 2026
Introduced
First Reading
upper
Mar 12, 2026
Lower · Passed
Engrossed, signed, to Senate
lower
Mar 11, 2026
Committee
Referred for engrossment
lower
Mar 11, 2026
Lower · Passed
Third Reading, Measure passed: Ayes: 65 Nays: 28
lower
Mar 11, 2026
Lower · Passed
Amended
lower
Mar 4, 2026
Lower · Passed
CR; Do Pass, amended by committee substitute Energy and Natural Resources Oversight Committee
lower
Feb 16, 2026
Lower · Passed
Policy recommendation to the Energy and Natural Resources Oversight committee; Do Pass, amended by committee substitute Energy
lower
Feb 3, 2026
Committee
Referred to Energy
lower
Feb 2, 2026
Introduced
First Reading
lower
2 primary · 0 co-sponsors
Sponsors
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