Several U.S. states face serious water shortages right now, with the crisis most acute in the Southwest. Arizona, Nevada, California, Utah, and New Mexico are among the hardest hit, but water stress is no longer limited to desert states. Parts of Florida, Kansas, Texas, and even Georgia are dealing with shrinking supplies that affect drinking water, farming, and future development.
The Colorado River States
The Colorado River supplies water to roughly 40 million people across seven states: Arizona, California, Colorado, Nevada, New Mexico, Utah, and Wyoming. For decades, these states have collectively used more water than the river produces, and the deficit has caught up. Lake Mead, the massive reservoir that stores water for the lower basin states, has dropped to levels that triggered mandatory cutbacks.
In 2025, lower basin users in Arizona, California, and Nevada face a combined reduction of approximately 1,033,000 acre-feet of water. That’s enough to supply roughly 3 million households for a year. Arizona absorbs the largest share of these cuts because of how water rights were historically divided. The state has already seen restrictions on new housing developments in parts of the Phoenix metro area, where officials determined the region cannot prove it has a guaranteed 100-year water supply for additional growth.
Nevada gets only a tiny fraction of the Colorado River’s total flow, making Las Vegas one of the most water-vulnerable major cities in the country. To adapt, Nevada passed a law in 2021 banning the use of Colorado River water to irrigate “nonfunctional grass,” meaning decorative turf along streets, parking lots, building frontage, and common areas managed by homeowner associations. The ban takes effect January 1, 2027, and applies to commercial, multi-family, and government properties. Single-family home lawns are exempt. It’s one of the most aggressive landscaping regulations in the country.
California’s Groundwater Problem
California faces a double threat. Its share of Colorado River water is being cut, and its underground water reserves are being pumped far faster than rain and snowmelt can refill them. The state’s Central Valley, which produces about a quarter of the nation’s food, depends heavily on groundwater, and several major underground basins are in critical overdraft.
Under California’s Sustainable Groundwater Management Act, the state has begun placing the worst-off basins on probation when local agencies fail to manage pumping sustainably. The Tulare Lake Subbasin and Tule Subbasin, both in the southern Central Valley, have already been designated probationary by the State Water Resources Control Board. That designation gives the state authority to step in and directly regulate pumping, a significant intervention in a region where farmers have historically drawn groundwater with few restrictions. The practical result for these areas is that hundreds of thousands of acres of farmland will likely need to be retired or fallowed over the coming decade because there simply isn’t enough water to sustain current use.
Arizona and the Limits of Desert Growth
Arizona is arguably the state feeling the most immediate pressure. It relies on the Colorado River for about 36% of its water supply, and the cuts keep getting deeper. Phoenix, Tucson, and the fast-growing suburbs between them have long stretched their water budgets through conservation and recycled wastewater, but the math is getting harder.
The state requires developers in certain areas to demonstrate a 100-year assured water supply before building new subdivisions. In 2023, Arizona officials acknowledged that groundwater models showed the Phoenix area could not fully meet that standard for all proposed development, effectively freezing some new construction unless developers secured alternative water sources. This was a landmark moment: a major American metro area admitting it doesn’t have enough water to keep growing the way it has been.
Texas and the Ogallala Aquifer
West Texas and the Texas Panhandle sit above the Ogallala Aquifer, one of the world’s largest underground water reserves. It stretches beneath eight states from South Dakota to Texas, and the southern portions are depleting fastest. In parts of Texas and Kansas, the aquifer has dropped more than 150 feet from its original levels. Unlike surface water that gets replenished by rain each year, the Ogallala refills extremely slowly. In some areas, recharge takes thousands of years.
For farming communities that depend on the Ogallala to irrigate wheat, cotton, corn, and cattle operations, this is an existential problem. Some wells that once produced strong flows now yield a fraction of what they used to, and farmers are already shifting to dryland crops or reducing irrigated acreage. Towns in western Kansas and the Texas Panhandle face the prospect of losing their primary water source within a generation.
Florida’s Saltwater Intrusion
Florida might seem like an unlikely candidate for a water crisis given its abundant rainfall, but the state’s geology makes it vulnerable in a way most people don’t expect. Much of South Florida’s drinking water comes from shallow underground aquifers that sit just above sea level. As ocean levels rise and coastal development increases, saltwater pushes inland into these freshwater supplies.
In Broward County, which includes Fort Lauderdale, the proximity of wellfields to the coast has led to salinized wells that have had to be abandoned. Updated maps from 2024 show the saltwater boundary advancing landward near the Peele Dixie wellfield in Fort Lauderdale. Miami-Dade County has dealt with well abandonment due to saltwater intrusion since as early as 1904, but the problem is accelerating. Once a well becomes contaminated with saltwater, it’s generally unusable, and utilities must drill new wells farther inland or invest in expensive desalination.
The Southeast’s Quiet Water Fights
Georgia, Alabama, and Florida spent more than three decades in legal battles over shared river systems, particularly the Chattahoochee River that flows from north Georgia through Alabama and into Florida’s Apalachicola Bay. The core dispute: metro Atlanta’s growing thirst for Chattahoochee water versus downstream states that needed flow for ecosystems, agriculture, and oyster fisheries.
That fight is now largely resolved. The 11th U.S. Circuit Court of Appeals dismissed Alabama’s lawsuit after Alabama, Georgia, and the Army Corps of Engineers struck a deal in 2023 over water management. An appeal filed by Florida environmental groups remains pending, but the state-level conflict is officially over. The resolution doesn’t mean the underlying tension is gone, though. Atlanta’s population continues to grow, and any prolonged drought could reignite disputes over who gets priority.
States at Highest Risk
The states facing the most immediate and severe water stress share common traits: rapid population growth, dependence on a single water source, or both.
- Arizona: Deepening Colorado River cuts, frozen development in some areas, and heavy reliance on a shrinking supply.
- Nevada: The smallest Colorado River allocation of any basin state, with Las Vegas almost entirely dependent on Lake Mead.
- California: Simultaneous surface water cuts and critically overdrafted groundwater basins, especially in farming regions.
- Utah: The Great Salt Lake has lost roughly half its surface area since the 1980s, largely due to agricultural water diversions, and the state’s population is among the fastest growing in the country.
- New Mexico: Chronic drought, declining Rio Grande flows, and limited groundwater reserves make it one of the most water-scarce states per capita.
- Kansas and Texas (western regions): Ogallala Aquifer depletion threatens the agricultural economy and small-town water supplies.
- Florida (coastal South): Saltwater intrusion is contaminating drinking water wells, with the problem worsening as sea levels rise.
Water scarcity in the U.S. is no longer a future prediction. It’s shaping where homes get built, what crops get planted, how lawns are landscaped, and which communities can sustain their current populations. The states running lowest are the ones where demand has been outpacing supply for years, and the gap is now too large to ignore.