The Colorado River crisis has entered a harsher phase, with a new US proposal that could slash water deliveries to Arizona, California and Nevada by as much as 40%.

The plan emerged after the seven states that rely on the drought-stricken river failed to reach a shared agreement on how to manage shrinking supplies. Reports indicate the federal government stepped in as the river’s major reservoirs kept dropping toward critically low levels, raising the stakes for cities, farms and power systems across the US west.

The new proposal signals that federal officials no longer expect the basin states to solve the river’s emergency on their own timeline.

A top Arizona water official shared details of the administration’s proposal at a state meeting on Wednesday, giving the clearest public sign yet of how severe the cuts under consideration may be. The scale matters: a reduction of up to 40% would reach far beyond routine conservation measures and force painful choices about who gets less water, and when.

Key Facts

  • The US government has proposed Colorado River cuts affecting Arizona, California and Nevada.
  • The proposal could reduce current supplies by up to 40%.
  • The move follows failed negotiations among the seven states that draw from the river.
  • The river’s reservoirs continue to fall to critically low levels.

The proposal also sharpens a long-running political and legal fight over the Colorado River, one of the most contested waterways in the country. States have spent months trying to bridge competing interests, but the latest signal from Washington suggests those talks did not produce a workable path. Sources suggest the administration now wants a framework that responds faster to declining reservoir levels, even if that means imposing cuts that states could not agree to voluntarily.

What happens next will shape how the west manages scarcity in an era of deeper drought and higher demand. The immediate battle will focus on whether the states can still rally around a revised compromise or whether federal officials will press ahead with their own plan. Either way, the message has grown unmistakable: the Colorado River no longer offers enough water for everyone to keep using it as before.