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Arizona faces 27% Colorado River cuts; officials say taps stay on but bills will rise

Monday, August 31, 2026 · 2 sources

A federal plan trims Arizona's Colorado River supply by about 760,000 acre-feet a year through 2028. Cities say backup supplies will keep taps flowing, but new infrastructure costs are expected to lift household water bills.

PHOENIX - Arizona will take the largest cut under a new federal plan for the drought-stressed Colorado River, but water managers say household taps in Phoenix and Tucson should keep flowing even as bills climb.

The Interior Department's two-year operating plan trims 1.25 million acre-feet a year from the Lower Basin states of Arizona, California and Nevada. Arizona's share of that mandatory cut is 760,000 acre-feet a year, about 27% of its Colorado River supply, according to NPR's KJZZ reporting and the Arizona Republic. California loses 440,000 acre-feet and Nevada 50,000. Cuts begin Jan. 1 and run through 2028, with a path to steeper reductions later if reservoirs stay low.

Lake Powell and Lake Mead, the nation's two largest reservoirs, have fallen to record lows after more than 26 years of drought and overuse. Seven basin states failed to agree on their own long-term deal, so the federal government set the rules.

Arizona cities that rely on the Central Arizona Project say they have built groundwater, reuse and conservation reserves for this kind of shortage. The harder hit falls on agriculture and on the cost of building the next round of pipes, treatment plants and alternative supplies. Those capital costs are paid largely by the people and businesses that use the water.

Tom Buschatzke, Arizona's water chief, told state users the two-year cuts buy time but that Arizona rejects a longer framework that could deepen reductions without Upper Basin states sharing more of the burden.

For retirees in the Valley, the practical message is about the monthly bill, not an empty faucet. Providers have already folded some drought costs into rates, and more increases are likely as the 2027-2028 cuts bite. California and Nevada face smaller percentage hits but the same need to stretch every gallon.

The 50+ takeaway: Taps are not expected to run dry in major Arizona cities under the two-year plan, but budget for higher utility costs as providers pay for groundwater, reuse and new projects.

Go Deeper

How much water does Arizona lose?

About 760,000 acre-feet a year under the two-year federal plan, roughly 27% of its Colorado River allocation, the largest cut among the Lower Basin states.

Will Phoenix or Tucson run out of water?

City and state officials say major urban systems have backup groundwater and other supplies for this round of cuts. The bigger near-term change is cost, not dry taps.

When do the cuts start?

Mandatory reductions take effect Jan. 1 and run through 2028, with the federal government able to revisit deeper cuts afterward.

Why is Arizona cut more than California?

Priority rules on the river give California stronger rights to Colorado River water. Arizona's Central Arizona Project supply sits lower in that legal order.

What should households do?

Watch your water utility's rate hearings, fix leaks, and ask about rebate programs for efficient fixtures. Budget for gradual bill increases even if supply stays stable.