Water is the issue that affects every part of daily life in Baja California. And it is getting worse. The state depends on the Colorado River for 95 percent of its water supply. Yet allocations from that river are shrinking. Drought, population growth, and upstream demand squeeze what is available. Baja California’s four active dams hold just 57 percent of their capacity. In 2025, the region recorded one of its driest years since 1950. The drought index hit 4.67 out of 5. For the growing community of American expats in Tijuana, Rosarito, and Ensenada, the Baja California water crisis desalination project offers hope. Still, water reliability remains the single biggest infrastructure concern.
This guide explains the Baja California water crisis and desalination solution. It covers the $840 million desalination plant that could change everything. It also explains what it all means for people who live here or are thinking about buying property.
How Baja California Gets Its Water
The story starts with the Colorado River. A 1944 treaty guarantees Mexico 1.5 million acre-feet of Colorado River water per year. That water flows through the Morelos Dam near Mexicali. Then canal operators distribute it through a canal system. This system serves agriculture in the Mexicali Valley and municipal systems in Tijuana, Tecate, and Ensenada.
The problem is that the Colorado River is shrinking. Twenty-five years of drought across the American Southwest have drained Lakes Mead and Powell to historically low levels. The seven U.S. states that share the river are fighting over reduced allocations. Mexico’s guaranteed share has not been formally cut. Yet the practical reality is that less water flows south each year.
Local sources do not make up the difference. Baja California has limited groundwater basins. Most of which are overdrawn. Rainfall is minimal. Tijuana averages about 10 inches per year. Also, the state has no major rivers of its own.
So the result is a system that was already stretched thin before the current drought made it worse.
What the Water Shortage Looks Like on the Ground
In Tijuana and Rosarito, water shutoffs are a fact of life. Neighborhoods in eastern Rosarito, parts of Playas de Tijuana, and hillside colonias in Tijuana regularly go two to four days without municipal water. Residents rely on rooftop storage tanks called tinacos. They schedule their daily routines around delivery truck schedules. Meanwhile, tinaco refills cost 300–800 pesos ($17–$44 USD) depending on the size and neighborhood.
Expats and foreign property owners often experience these shutoffs for the first time with surprise. In the United States, turning on the tap and getting water is assumed. Yet in much of Baja California, it is not. Homeowners in water-scarce neighborhoods spend $50–$150 USD per month on supplemental water delivery. Some have installed cisterns. These are large underground storage tanks that hold 5,000 to 10,000 liters. They serve as a buffer against shutoffs.
Ensenada faces similar challenges. The city’s Misión and El Sauzal districts experience periodic low-pressure days. Valle de Guadalupe’s wine region has grappled with water access for years. Some wineries drill private wells. Meanwhile, others truck water in during dry months.
The shortage also affects property values. Real estate agents in Rosarito report that water reliability is among the top three questions American buyers ask. Other key questions concern safety and internet service. So neighborhoods with more consistent water supply command higher prices.
The $840 Million Desalination Plant
This is the project that could change the equation. Mexico’s federal water commission Conagua is building the largest desalination plant in Latin America on the coast near Rosarito. Construction begins at the end of March 2026. The Baja California water crisis and desalination project will be the focus. The facility will produce 2,200 liters per second of desalinated ocean water. This production boosts Tijuana’s supply by up to 45 percent, according to Smart Water Magazine and Baja Times.
The total investment is $840 million USD (14.6 billion pesos), split between federal and state funding. President Claudia Sheinbaum backed the project with federal money in November 2024. Completion is targeted for 2029.
The plant has a rocky history. It was first proposed years ago under a public-private model. Then it was cancelled in 2020 by Governor Jaime Bonilla. A private company, Consolidated Water, filed an arbitration case. But current Governor Marina del Pilar dismissed that case in 2024. She relaunched the project as a fully public venture.
Skepticism is understandable. Rosarito residents — both Mexican and expat — have heard promises about water infrastructure before. Yet this version carries more institutional weight. Federal funding is committed. Conagua is managing construction directly. And the project has survived two administration changes. So this time feels different.
Why Desalination Is Not a Simple Fix for Baja California
Even if the plant delivers on time, desalination alone does not solve Baja California’s water problems. Here is why.
The distribution system is the first issue. Yale Climate Connections reported that nearly half of Tijuana’s water is lost in the distribution network before reaching consumers. Old pipes, illegal connections, and poor maintenance cause the losses. Producing more water does not guarantee more water arrives at homes. So unless the distribution infrastructure is upgraded alongside the new supply, the gains will be smaller than the headline numbers suggest.
Energy is the second concern. Desalination is energy-intensive. It takes roughly 3 to 4 kilowatt-hours to produce one cubic meter of desalinated water. Baja California’s power grid is already strained during summer months. And when hurricanes knock out electricity in Baja California Sur, desalination plants and well pumps go offline. A backup power system is part of the Rosarito plant design. However, its capacity has not been publicly detailed.
Brine discharge is the third issue. Desalination produces concentrated salt water as waste. If not properly managed, brine damages marine ecosystems near the discharge point. So far, officials have not made the environmental impact assessment for the Rosarito plant public.
Water Month 2026 and Public Awareness
March 2026 is “Mes del Agua” (Water Month) in Mexico. Awareness campaigns are running across Baja California. Municipal governments in Tijuana, Rosarito, and Ensenada are using the month to promote water conservation programs. They also publicize the desalination project timeline.
For expats, Water Month is a reminder that water scarcity is not a background issue in Baja — it is front and center in municipal politics, household budgets, and property decisions.
What Expats and Property Buyers Should Know
If you are considering buying property in Baja California, ask these questions before signing anything. What is the water situation in this specific neighborhood? How often are shutoffs? Does the property have a cistern or tinaco? Is the area on the planned distribution route for the new desalination supply? What do current residents pay for supplemental water delivery? These details matter for expat property buyers.
If you already own property, investing in a cistern is the single best hedge against water uncertainty. A cistern has 5,000–10,000 liter capacity. Installation costs $500–$1,500 USD. A quality water filtration system for drinking water adds another $200–$400 USD. These investments pay for themselves within a year. You benefit from reduced delivery costs and peace of mind.
Watch the desalination project timeline closely. If construction stays on schedule through 2027, that is a positive signal for property values in water-scarce Rosarito neighborhoods. Yet if it stalls — as previous iterations did — the chronic shortage will continue. It may intensify as the population grows.
Baja California Water Crisis Outlook
Baja California’s water crisis is real, chronic, and unlikely to resolve quickly. The Colorado River is not going to produce more water. Local rainfall is not going to increase. Population growth along the Tijuana-Rosarito corridor is not going to slow. The desalination plant is the most credible large-scale solution on the horizon. Yet it is three years from completion and carries execution risks.
For English-speaking residents and property owners, the practical strategy is clear. Prepare for continued shortages in the near term. Also watch the desalination project for signs of progress. Invest in household water storage. Budget for delivery costs. And factor water reliability into every real estate decision you make in Baja California.