Nevada sues Interior to overturn the new Colorado River operating rules
Three days after the Record of Decision, the State of Nevada, the Colorado River Commission of Nevada, and the Southern Nevada Water Authority filed suit in federal court. Nevada says its 300,000 acre foot allocation could be cut by up to 213,556 acre feet while the Upper Basin faces no mandatory reductions.
- Nevada allocation
- 300,000 AF
- Worst-case cut under the ROD
- Up to 213,556 AF
- Remaining, worst case
- < 86,500 AF/yr
- Southern Nevada 2024 use
- ~212,500 AF
What happened
On August 24, 2026 the State of Nevada, together with the Colorado River Commission of Nevada and the Southern Nevada Water Authority, filed a lawsuit in federal district court contesting the Department of the Interior’s Record of Decision on Colorado River operations, issued August 21.
The state’s release lays out the arithmetic: Nevada’s 300,000 acre foot allocation stands to be cut by up to 213,556 acre feet under the framework, leaving less than 86,500 acre feet a year, against roughly 212,500 acre feet the community actually used in 2024. Governor Joe Lombardo called it a matter of survival for a community representing about two-thirds of the state’s residents, and objected that the four Upper Basin states face no mandatory reductions at all, only voluntary conservation goals.
What it means if you own water here
This is the first lawsuit against the post-2026 framework, and it comes from a state, not an interest group. An injunction or vacatur would reopen 2027 operations across the whole Lower Basin, so every owner of Lower Basin water is now pricing two futures: the rules as signed, and the rules if a court sends them back.
The Gila River Indian Community has said it will not hesitate to turn to the courts either. If the framework survives, Nevada is the state most desperate for conserved water per acre foot of allocation, which is a useful fact for anyone holding water that can reach it.
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