Limón doesn't need a data center; the data center needs Limón

Two hundred megawatts sound abstract. Let's translate them into bills. Quantum Free Zone announces up to 200 MW of computing load—not total consumption—in Limón, distributed across seven buildings on 42 hectares, with its own 230 kV substation.[1] With a PUE of 1.20—the ratio between the total energy the facility consumes and what just the computing equipment spends—that campus would need 240 MW on its meters and 2,102 GWh per year: 15.7% of all the electricity Costa Rica produced in 2025 and 16.2% of the demand the country actually served.[2][4]

In household terms, that energy would supply about 700,800 homes consuming 250 kWh monthly, the reference household that ARESEP uses in its tariff examples.[3][4] With the global average PUE that Uptime Institute reported in 2026—1.52, practically unchanged for seven years—the equivalence rises to about 887,700 homes.[5] That second value is not a forecast for Quantum: it's a stress test. It measures how far a large project sits from a national planning problem.

The calculation assumes the full campus operating at peak computing load for all 8,760 hours of the year. It's the ceiling of final deployment, not first-year consumption: phase one is 50 MW, and no data center operates permanently at 100% of its nominal load.[1] As a ceiling, however, it's exactly the figure that national electrical planning must be able to absorb without shifting the shortfall to other customers.

Costa Rica has mostly renewable electricity, institutional stability, free trade zones, talent, and submarine connectivity. It also has a small grid, unevenly distributed water resources, and communities tired of discovering the costs after the inauguration. The viability exists. The blank check does not.

A brochure is not a dossier#

Before discussing megawatts, it's worth reviewing what actually exists. Quantum Development Inc. lost its free trade zone status on May 27, 2026, through executive agreement ACU-RZF-0025-2026-COMEX published in La Gaceta on July 20, and as of September was still advertising total income tax exemption.[6] SETENA has no project file on record and the Municipality of Limón has received no applications for land use or construction; the municipality itself describes the current stage as a socialization phase.[6][7]

Mayor Ana Matarrita Mc Calla summed up the actual status of the proceedings when referring to the company's free trade zone status: «they didn't tell me, and I asked».[6] The site itself is described as a «summary of conceptual planning for prospective clients,» notes that final economics depend on transaction structure and Costa Rican law, and lists as pending additional engineering, coordination with public service companies, water studies, and environmental review.[1] The country, strictly speaking, is debating a well-designed commercial brochure.

«200 MW in Limón equals 15.7% of the electricity Costa Rica produced in 2025. The ICE expansion plan mentions data centers not once.»

That distance between announcement and dossier is not a procedural detail: it is the entirety of the risk. Whoever announces first and files later transfers the cost of that expectation to the territory that received it. Limón has spent decades learning that lesson with ports, refineries, and reactivation promises. It deserves the order reversed this time.

Two campuses and a grid that doesn't have them planned#

Palo Negro AI & HPC Campus, in Bagaces, is in the prefeasibility phase.[8] The figures circulating about its size—around 120 MW of its own renewable generation, battery storage, and a target PUE near 1.10—come from the developer's promotional material and lack verifiable public documentary backing. It bears saying plainly: technically, almost nothing is known about the second campus.

Adding 200 MW from Limón to the 120 MW attributed to Bagaces would mix two different quantities: the first describes computing demand; the second, nominal variable generation capacity. That confusion of units is the fastest way to turn a technical debate into a headline battle.

It is legitimate to build a stress scenario. If both someday operated at Limón's computing scale with PUE 1.20, they would jointly consume 480 MW and 4,205 GWh annually: 31.5% of the nation's 2025 electrical output, or the electricity for roughly 1.4 million reference households.[2][3][4] They would be two industrial customers absorbing nearly a third of the production the country recorded in 2025, around the clock, including Sundays, early mornings, and difficult hydroelectric summers. Against 2032 production, the fraction would be smaller, but only if that expansion actually gets built.

The fact that makes that exercise urgent doesn't appear in any brochure. The ICE's 2024-2040 Electrical Generation Expansion Plan, the current official planning, does not mention data centers even once.[9] In August 2026 the vice minister of Energy warned that «already now our electrical supply model is limiting growth» and estimated the country needs roughly 1,000 MW additional by 2030.[10] One campus would consume the equivalent of 24% of that goal, and strictly speaking would demand more installed capacity than that, because a flat load of 240 MW is not covered by 240 MW of variable generation. Two campuses would approach half. The same vice minister estimated that another 1,000 MW would be needed in the following five-year period.

That's where the real business is, and it bears naming with precision. Costa Rica isn't selling renewable electricity: it's selling future scarcity at the price of past abundance. The country entered this conversation believing it offers a cheap input it has to spare. What it really offers is the same resource that its industry, its electric mobility, and its hydrogen will compete for over the next decade.

The global scale explains the developers' urgency. Data centers worldwide consumed 485 TWh of electricity in 2025, 17% more than the previous year, and the International Energy Agency projects close to 950 TWh by 2030.[27] Costa Rica's entire electrical output in 2025 was 13.4 TWh. The entire country equals 2.75% of what this industry already consumes. We're not the market: we're the input.

A refrigerator the size of a canton#

Nearly all the electricity that enters a data center exits converted to heat. A campus requiring 240 MW must continuously expel thermal load equivalent to running 2.4 million 100-watt lightbulbs continuously within the same premises.[4][11] Climate then stops being landscape and becomes an engineering specification with tariff consequences.

At Limón airport, the IMN recorded between 2005 and 2025 mean maximum temperatures of 30.6 °C in January and 32.6 °C in September, with mean minimums between 18.7 °C and 21.7 °C; the Caribbean slope receives between 2,500 and 4,500 mm of rainfall per year depending on the subregion.[12] Sustained heat, moisture-laden air, and saline environment reduce the useful hours for outside air cooling and increase corrosion and environmental control costs.

Bagaces inverts the problem. Evaporative cooling works well in dry climates, but consumes water precisely during the dry season; closed-loop cooling saves water at the cost of more electricity, more surface area, and more equipment. The U.S. Department of Energy defines PUE and WUE and documents that evaporative cooling and outside air strategies trade water for electricity according to environmental conditions.[11] Hence an elegant annual average can hide an unsustainable April afternoon.

"We have water" is not yet a water balance#

Quantum advertises infrastructure to capture approximately 350 liters per second of municipal water.[1] The complete expansion of the Limón aqueduct—₡7.637 billion, fifteen kilometers of new pipe, benefiting 132,700 residents and including the industrial zone—provides just over 5.1 million liters daily, that is, 60 liters per second.[13] The project contemplates infrastructure to capture nearly six times the total increment the AyA just built for the entire city.

The comparison demands technical honesty, because capture capacity and net consumption are not the same. With a WUE of 0.5 liters per kWh of computing—within the range that the Lawrence Berkeley National Laboratory models for U.S. data centers, well above the 0.27 L/kWh Microsoft reports and below the 0.91 L/kWh Equinix global figure—a 200 MW computing campus would consume 876 million liters per year: 2.4 million daily, about 350 Olympic pools, equivalent to a continuous flow of 28 liters per second.[4][11][14] With intensive evaporative cooling, the figure approaches 50.

Even in the efficient scenario, a single customer would consume nearly half the water the entire city just gained. And direct consumption is the small part: the Lawrence Berkeley National Laboratory calculated that U.S. data centers consumed 66 billion liters of direct water in 2023 against 800 billion liters indirect through electricity generation.[14] Twelve times more. Evaluating only on-site water underestimates the impact by an order of magnitude.

In Guanacaste the margin is even narrower. The Management and Infrastructure Plan for Northern Pacific Water Resources documents deficits starting in November in areas of the Tempisque-Bebedero basin not benefiting from the DRAT, and the 2014-2016 drought left precipitation deficits of between 15% and 45% with agricultural losses of ₡19 billion (USD$35 million at 2016 exchange rates).[15] Bagaces also carries a history of arsenic contamination in its water supply. The environmental assessment must separate capture, recirculation, evaporation, discharge, and net consumption, month by month and not in annual average.

The ROI that doesn't appear in the render#

Electricity defines bankability. Each US$0.01 per kWh moves US$8.76 million annually in a continuous 100 MW load; for the Limón campus operating at 240 MW, each cent is worth US$21 million per year.[4] At the current industrial rate T-MTb, close to US$0.095 per kWh for a flat 24-hour load, the campus annual electricity bill would approach US$200 million.[16][4] This sensitivity explains why developers seek special tariffs, and why the regulator must prevent households and SMEs from ending up subsidizing infrastructure built for a single customer.

Virginia already lived that outcome. Its legislative audit commission estimated that, under an unconstrained growth scenario for demand, a typical residential customer could see increases between US$14 and US$37 monthly in its generation and transmission costs by 2040.[17] The same report clarifies that today data centers pay their full cost of service: what it documents is a future shift in system costs, not a current subsidy. The same report documents that the sales tax exemption for these facilities reached US$928.6 million in fiscal year 2023: by far, the largest economic development incentive in the state.

The promise of employment deserves equal discipline. A typical data center of some 23,000 square meters employs around 50 full-time workers, roughly half of them under third-party contracts, while its construction peaks at around 1,500 workers within a 12 to 18-month cycle per building.[17] These are valuable and well-paid jobs, but the photograph of the cranes lasts longer than the operational labor impact, and cameras usually arrive precisely when the cranes are there.

National ROI must add taxes actually paid after exemptions, permanent salaries, local purchases, shared infrastructure, training, research, and Costa Rican access to computing. It must subtract transmission, backup, incentives, water, externalities, stranded asset risk, and the alternative value of that electricity. A project can offer excellent private returns and leave a meager public harvest. Ireland is the warning: its data centers went from 5% of measured electricity in 2015 to 23% in 2025, with a growth of 517% versus 34% of total national consumption.[18]

What other countries have already learned to charge#

The regulatory novelty of the past two years is not prohibition: it is price. In December 2025, Ireland decided that every new data center must provide generation or storage equivalent to the total of its maximum requested demand, participate with that capacity in wholesale markets, and cover at least 80% of its annual consumption with additional renewable projects built in the country, with a six-year deadline to develop them.[19] It stopped debating whether to connect them and started charging them for the infrastructure they demand.

Ohio approved in July 2025 a specific tariff for loads exceeding 25 MW, with minimum payment of 85% of contracted capacity regardless of use, contracts of up to twelve years, and exit charge equivalent to three years of consumption.[20] Georgia subjects to regulatory review every contract with customers larger than 100 MW.[21] Singapore allocates capacity by auction: its second call offers at least 200 MW and requires PUE of 1.25 or better at 100% of computing load, Green Mark Platinum certification, and a minimum of 50% of energy from eligible green pathways.[22]

Latin America has already produced its own jurisprudence. Google redesigned its data center in Canelones (in Uruguay) with air cooling—after originally proposing up to 7.6 million liters daily of drinking water in the middle of drought—and obtained environmental approval in July 2024.[23] In Chile, the Second Environmental Court ordered in September 2024 a reevaluation of the Cerrillos project incorporating the impacts of climate change on water resources.[24] None of those countries drove away investment: they reordered it. The Netherlands went further and decreed in 2022 a nine-month moratorium on installations larger than ten hectares and 70 MW while they drafted their rules.[25]

A conditional opening#

Each project should enter in phases of 20 or 50 MW and advance only upon demonstrating anchor client, financing, current permits, proof of water availability, interconnection, and additional firm generation. The developer must pay the causal costs of transmission and backup, present minimum consumption guarantees, and accept use-it-or-lose-it clauses. None of this is hostile to capital: it is exactly what they already sign in Ohio and Dublin.

The country contract must survive the ribbon cutting. Computing quotas for universities, SMEs, and public services; R&D funds; training in HPC, cooling, and cybersecurity; auditable goals for local suppliers; monthly publication of PUE and WUE verified by an independent third party; drought protocols with legal priority for human consumption; and dismantling and recycling obligations. Without those ties, Costa Rica will export clean electrons, import exempted servers, and retain the heat. A digital maquila, but with GPU.

The technological frontier also deserves reading without romanticism. Microsoft canceled Project Natick in June 2024 despite its underwater servers failing less than those on land—6 of 855 versus 8 of 135—; its operations lead was explicit in stating that the company does not build data centers underwater anywhere in the world.[26] China did scale the idea: the Lingang module, in Shanghai, operates 24 MW at about 35 meters depth coupled to offshore wind parks.[26]

That is the lesson worth using, not the underwater rendering. The design that advances couples computing to its own generation rather than plugging it into a grid that others paid for. Costa Rica can demand exactly that, and its small grid—which today might be read as a negotiating weakness—is precisely the reason why it can still impose conditions that large grids have already lost the capacity to impose.

Limón and Bagaces can host strategic infrastructure and should aspire to it. The requirement is to negotiate from the value of our resources and not from anxiety about receiving investment. A country that sets a price before signing does not drive away capital: it filters out what did not serve it. The future will not reward the country that announces more megawatts. It will reward the one that converts each one into productivity, knowledge, and technological sovereignty.

Sources and calculation notes#

1. Quantum AI Free Zone Campus — official project site. Developer's promotional source: up to 200 MW of computing load across seven buildings, 42 hectares, 230 kV substation, deployment in three phases from 50 MW, and approximately 350 L/s of municipal water. The site is presented as a summary of conceptual planning for prospective clients and lists as pending additional engineering, coordination with utilities, fiber validation, water studies, and environmental review.
2. ICE-CENCE, Electricity Production and Demand: 2025 Annual Report. Total production: 13,352,937.26 MWh, with 98.6% renewable. National demand met was 12,995.44 GWh, with 97.3% renewable. The difference from production corresponds to the balance of exchanges with the Regional Electricity Market: in 2025 Costa Rica exported 510.79 GWh and imported 180.05 GWh.
3. ARESEP: Electricity Rate Setting for 2026. Uses 250 kWh monthly as an example of residential consumption. It is a reference tariff dwelling, not a published national statistical average.
4. Own calculations. Annual energy = power × 8,760 hours. PUE = total installation energy ÷ IT energy. Thus, 200 MW IT × 1.20 × 8,760 = 2,102,400 MWh. The residential equivalent divides that energy by 3,000 kWh annually per dwelling. Cost: 100,000 kW × 8,760 h × US$0.01/kWh = US$8.76 million. Water: WUE is normalized per kWh of IT equipment, according to DOE definition, so 200,000 kW × 8,760 h × 0.5 L/kWh = 876 million liters, equivalent to 27.8 L/s continuous. A conventional Olympic-size pool of 2.5 million liters is used as reference.
5. Uptime Institute, Global Data Center Survey 2026. Average annualized PUE of 1.52, within a seven-year trend of stagnation (1.54 in 2025; 1.56 in 2024).
6. La Nación: The company promoting the AI data center in Limón lost its free trade zone status. Executive Agreement ACU-RZF-0025-2026-COMEX of May 27, 2026, published in La Gaceta on July 20, 2026. Includes verification that no file exists in SETENA and the declaration of the mayor of Limón.
7. La Nación: Project to develop a data center in Limón. Describes the project status as socialization phase, with no progress toward the construction stage.
8. La República: Guanacaste to host a new AI campus with its own renewable energy model. Palo Negro Project (Bagaces) in prefeasibility phase. The 120 MW figure and the breakdown of generation, storage, and target PUE circulate in the developer's promotional material and in derived notes, such as SURCOS Digital: without publicly verifiable documentary backing. For this reason they are not used as the basis for calculation in this text.
9. ICE, Electricity Generation Expansion Plan 2024-2040. Full review of the document: it contains no mentions of data centers.
10. Delfino.cr: Vice Minister of Energy warns that the electricity supply model already limits economic growth. Statements by Rony Rodríguez Chaves; estimate of demand growth of 2.5%-3.5% annually and approximate need for 1,000 MW additional by 2030.
11. U.S. Department of Energy: Water Efficiency Opportunities in Cooling Federal Data Centers and Best Practices Guide for Energy-Efficient Data Center Design, rev. July 2024. Definitions of PUE and WUE (liters per kWh of IT equipment) and performance references: standard PUE 1.6, good 1.4, best 1.1.
12. IMN: Climatology of Limón, Limón Airport station, 2005-2025 and characterization of the Caribbean Watershed. The IMN does not publish relative humidity by region in its regional climatological documentation; humidity is characterized using dew point temperature.
13. Office of the President: More water for the development of the industrial zone in Limón. Aqueduct expansion of more than ₡7,637 million that increases availability by more than 5,184,000 liters daily—equivalent to 60 L/s—for more than 132,700 residents.
14. Lawrence Berkeley National Laboratory, 2024 United States Data Center Energy Usage Report. Direct water consumption of 66 billion liters in 2023 versus 800 billion liters of indirect consumption associated with electricity generation. WUE references from operators: Microsoft reported 0.27 L/kWh in fiscal year 2025; Equinix, 0.91 L/kWh globally and 1.41 L/kWh at sites with evaporative cooling.
15. Water Department, MINAE: Plan for Water Resources Management and Infrastructure, Northern Pacific 2020-2030. Deficit from November in areas of the Tempisque-Bebedero basin not benefiting from DRAT; drought 2014-2016 with precipitation deficit of 15% to 45% and agricultural losses of ₡19 billion.
16. CNFL: Rate schedule in effect as of January 1, 2026 and ARESEP: Creation of the competitive rate T-MTb for the industrial sector. Own calculation of blended cost for a flat 24-hour load in the CNFL rate schedule, adding energy charges (Ţ39-41/kWh) and power charges (Ţ8/kWh equivalent) according to peak, off-peak, and night periods: Ţ47-49/kWh, equivalent to US$0.092-0.098/kWh; the upper end assumes application of the maximum prices of the band. The T-MTb was set by ARESEP in 2015 with a target of US$0.10/kWh and requires a minimum consumption of 1,000,000 kWh monthly and a maximum demand of 2,000 kW, thresholds that a campus of this scale comfortably exceeds. Costa Rica does not have a specific rate for data centers.
17. Virginia Joint Legislative Audit and Review Commission, Data Centers in Virginia, Report 598, December 2024. A typical data center of 250,000 square feet (23,226 m²) employs about 50 full-time workers (p. 12); the construction peak reaches about 1,500 workers and each building takes 12 to 18 months (p. 13); sales tax exemption of US$928.6 million in fiscal year 2023 (p. 20); projected increase from US$14 to US$37 monthly, in constant dollars, in the generation and transmission costs of the typical residential customer toward 2040 under the scenario of unrestricted demand growth (summary, p. v). The report notes that data centers currently cover their full service cost.
18. Central Statistics Office of Ireland, Data Centres Metered Electricity Consumption 2025, published July 7, 2026. 23% of electricity measured in 2025 versus 5% in 2015; 7,663 GWh consumed in 2025 versus 1,240 GWh in 2015; 517% growth over the decade versus 34% of total consumption.
19. Commission for Regulation of Utilities in Ireland: decision on new electrical connection policy for data centers, December 12, 2025; includes a six-year timeline to develop required additional renewable generation.
20. Public Utilities Commission of Ohio: specific rate for AEP Ohio data centers, approved July 9, 2025. Applies to loads above 25 MW, with minimum payment of 85% of contracted capacity, contracts of up to twelve years, and exit charge equivalent to three years of consumption.
21. Georgia Public Service Commission: rule on high-load customers, approved January 23, 2025. Applies to new customers with demand above 100 MW; contracts of 5 to 15 years subject to regulatory review.
22. IMDA Singapore: second data center call (DC-CFA2) and Green Data Centre Roadmap. At least 200 MW allocated by tender with three evaluation axes—strategic value, economic contribution, and sustainability—PUE of 1.25 or better at 100% IT load, Green Mark for Data Centres 2024 Platinum certification, and minimum 50% energy from eligible green pathways.
23. Data Center Dynamics: Google's data center in Uruguay was approved after its reformulation. Redesign with air cooling and Environment Ministry approval in July 2024; maximum energy consumption below 560 GWh annually.
24. Second Environmental Court of Chile, ruling of September 26, 2024 on Google's data center in Cerrillos. Orders reevaluation of the project incorporating the impacts of climate change on water resources.
25. Data Center Dynamics: Dutch Government halts hyperscale data centers pending new rules. Nine-month moratorium announced February 16, 2022 for facilities exceeding ten hectares with consumption of 70 MW or higher.
26. Data Center Dynamics: Microsoft confirms the end of Project Natick and the HiCloud submarine data center powered by offshore wind off Shanghai. Statement by Noelle Walsh of June 17, 2024; failure rates of 6 out of 855 submarine servers versus 8 out of 135 on land; Lingang module of 24 MW at approximately 35 meters depth.
27. International Energy Agency: Key Questions on Energy and AI, April 2026. Global data center consumption of 485 TWh in 2025, with year-on-year growth of 17%, and projection near 950 TWh by 2030.