Los Cabos Second Desalination Plant: What October 2026 Completion Means for Property Buyers

The second desalination plant in Los Cabos is completing in October 2026, and for property buyers, this is the most consequential infrastructure development since the SJD airport expansion. Combined with the existing first plant (operating since 2006), the system will deliver 650 liters per second of drinking water — enough to serve 464,000 inhabitants according to ACCIONA, the Spanish infrastructure firm operating the facility under a 25-year public-private partnership.

Key Takeaways

• Combined desalination capacity reaching 650 liters per second in October 2026, serving 464,000 people — a transformational upgrade for a region that relied heavily on wells and aquifers.
• The new plant is built by ACCIONA under a EUR 134.5M budget with a 25-year public-private operation contract, ensuring long-term institutional management rather than short-term government operation.
• The first desalination plant (2006) has been running at only 36% capacity due to pipeline distribution limitations — the new plant addresses both production AND distribution gaps.
• Property buyers who have historically discounted Los Cabos due to water concerns now face a region with more reliable water infrastructure than many US Southwest cities dependent on the Colorado River.
• Communities with private desalination or well systems (Pedregal, many Corridor developments) are independently water-secure regardless of municipal supply — but the municipal upgrade benefits the broader economy and tourism confidence.

What Is Being Built

The new facility, constructed by ACCIONA, uses reverse osmosis desalination to convert Pacific Ocean seawater into drinking water. Key specifications:

• Capacity: 250 liters per second (7.9 million cubic meters per year)
• Budget: EUR 134.5 million
• Operation model: 25-year public-private partnership (PPP) — ACCIONA builds, operates, and maintains; the municipality purchases the water
• Coverage: designed to serve 464,000 inhabitants across Los Cabos municipality
• Completion: October 2026

Combined with the first plant (operating since 2006 with a capacity of approximately 400 liters per second), total desalination output reaches 650 liters per second. However — and this is critical — the first plant has been running at only 36% of capacity. Not because it cannot produce the water, but because the distribution pipeline network to deliver that water to all neighborhoods was never fully built out.

The Distribution Problem — and How the New Plant Addresses It

This is the detail that most water discussions about Los Cabos miss. Producing desalinated water is half the equation. Getting it through pipes to taps across a rapidly growing municipality is the other half. The first plant's 36% utilization rate tells you that production was not the bottleneck — distribution was.

The new ACCIONA project includes significant pipeline infrastructure as part of the EUR 134.5M scope. This means the second plant is not just adding supply capacity — it is closing the distribution gap that kept the first plant underutilized. For neighborhoods and developments that have historically relied on supplemental water sources (cistern trucks, private wells), this represents a genuine improvement in service reliability.

What This Means for Property Buyers

Water infrastructure is a foundational concern for every serious property buyer in Los Cabos. Here is how the desalination expansion changes the calculus:

1. Long-Term Supply Security

Los Cabos is a desert with 6–10 inches of annual rainfall. Before desalination, the region depended on aquifers that were being drawn down faster than they recharged. Desalination breaks that dependency — the Pacific Ocean is, for practical purposes, an unlimited water source. This gives Los Cabos a long-term water security advantage over US Southwest cities like Phoenix and Las Vegas that depend on the Colorado River, which is facing historic allocation cuts.

2. Property Value Support

Water scarcity has been a legitimate objection that savvy buyers have raised when negotiating Los Cabos property prices. That objection weakens significantly with 650 L/s of desalination capacity coming online. Expect to see the "but what about water?" discount shrink as the new plant becomes operational and delivery improves.

3. Development Pipeline Confidence

New resort and residential developments require water allocation permits from the municipality. Increased supply capacity means the municipality can approve more development — which drives economic growth, creates construction jobs, and brings new amenities. For existing property owners, this is a rising tide that lifts all boats. For pre-construction buyers, it means fewer projects will face water-related permitting delays.

How Different Communities Source Water

Not all Los Cabos properties are equally affected by municipal water supply. Here is how the main community types handle water:

• Private desalination: Pedregal operates its own desalination plant, making it water-independent from the municipal system. Several other large Corridor developments have private systems.
• Municipal supply + cistern backup: Most urban and suburban properties in Cabo San Lucas and San Jose del Cabo connect to OOMSAPAS (the municipal water utility) with rooftop cistern (tinaco) or underground cistern backup. The municipal desal expansion directly benefits these properties.
• Private wells: Some developments and rural properties use private well water. Well quality and quantity vary significantly. The aquifer recharge is slow, making long-term well reliability less certain than desalination.
• Cistern-only / trucked water: Some rural and East Cape properties rely entirely on water delivery trucks (pipas) filling cisterns. These properties are unaffected by the municipal desalination expansion but also carry higher operational costs and less reliability.

What Water Costs Property Owners

Municipal water through OOMSAPAS is heavily subsidized for residential use. Typical monthly water bills for a Cabo home or condo:

• Residential (domestic tariff): $15–$50 USD per month for normal household use
• High consumption surcharge: tiered pricing that escalates for heavy users (large gardens, pools). Can reach $100–$200/month for water-intensive properties.
• Private desal or well: no municipal water bill, but electricity costs to run the system are significant ($200–$500/month for a private desal unit).
• Pipa delivery: $50–$80 per 10,000-liter truck delivery. A property using 3–4 deliveries per month spends $150–$320 on water alone.

See our detailed water costs breakdown for a comprehensive comparison by property type.

Broader Context: Baja's Desalination Push

Los Cabos is not alone in turning to desalination. Up the peninsula, the Playas de Rosarito mega-desalination plant — at $840M the largest such project in Latin America — will produce 2,200 liters per second when Phase 1 completes in 2029. Arizona is studying a joint desalination facility with Baja California that could free up Colorado River water through a cross-border exchange.

The trend is clear: Baja California Sur and Baja California are betting their water futures on desalination rather than fighting over shrinking river allocations and aquifers. For property buyers, this is a long-term positive signal — the infrastructure investment is real, institutional, and ongoing.