Paraguay’s Hydropower Dilemma
What the ATOME Dispute Reveals About Industrialisation
ATOME’s Villeta fertilizer project turns an abstract policy question into a concrete industrial test. Paraguay wants to use abundant hydropower to attract higher-value production, while ANDE must protect the long-term economics of the electricity system. The resulting dispute is now testing tariff design, project bankability, regulatory certainty and the value Paraguay assigns to its own power.
The ATOME dispute is a test of how Paraguay converts hydropower into industrial value.
ATOME’s Villeta project is designed around 145 MW of renewable electricity and roughly 260,000 tonnes per year of low-carbon calcium ammonium nitrate fertilizer. The company reached Final Investment Decision in 2026 after arranging US$665 million of debt and equity financing. IDB Invest describes the direct investment at approximately US$650 million and a US$420 million debt package.
The project’s financing structure depended on a replacement power purchase agreement with ANDE. ATOME said on 10 June that the form of this PPA had been agreed but not yet executed when Paraguay revoked presidential decrees that had established the tariff framework. Negotiations continued through the following months.
On 17 September, ATOME served a Notice of Dispute and Intent to Submit a Claim to Arbitration under the UK–Paraguay bilateral investment treaty. Paraguay’s Attorney General’s Office responded that there is currently no lawsuit or arbitration and that the notice opens a three-month period to explore an amicable solution.
The central economic question is therefore broader than the legal dispute: how much should Paraguay charge a large industrial investor for electricity when cheap power is itself the country’s main industrial advantage?
Core market reading
Paraguay’s hydropower advantage is real, but its commercial meaning is changing. The country can no longer evaluate large energy-intensive projects only by asking whether electricity is available. It must also decide how power should be priced over long periods, who carries the risk of future generation costs, how much capacity should be reserved for one project and what form of industrial value justifies preferential or specially structured terms.
This is the same structural issue identified in Econosur’s Paraguay power-grid and regulation analysis: abundant generation does not automatically translate into a bankable industrial tariff at the exact location, duration and risk profile a project requires.
Villeta was designed as an industrial use of Paraguay’s hydropower
ATOME’s project logic is straightforward. Renewable electricity from Paraguay’s hydro-based system would power electrolysis, producing hydrogen that is combined with nitrogen to make ammonia and then converted into calcium ammonium nitrate fertilizer. The output is an exportable industrial product rather than electricity itself.
The project is designed at 145 MW and approximately 260,000 tonnes of annual fertilizer capacity. ATOME’s project page states that power accounts for 60–70% of production cost. This makes the electricity contract part of the production model rather than a normal utility arrangement.
The financing advanced unusually far. In March 2026, IDB Invest announced a US$420 million debt package for a project it described as approximately US$650 million of direct investment. IFC signed financing documents and explicitly framed Villeta as part of Paraguay’s attempt to move up the value chain by transforming abundant renewable electricity into higher-value industrial production. In April, ATOME announced Final Investment Decision after arranging US$665 million of debt and equity funding.
ATOME also announced a fixed-price US$465 million EPC contract with Casale and a ten-year offtake agreement with Yara for the project’s production. In project-finance terms, Villeta was therefore moving beyond a concept-stage hydrogen project. Engineering, financing, EPC and offtake had been assembled around one unresolved variable that later became decisive: the final long-term electricity framework.
Villeta is a fertilizer project, but its core economic input is Paraguayan electricity.
The June 2026 reset changed the electricity framework
On 9 June 2026, President Santiago Peña revoked Decrees 5306 and 5307 of 16 January and Decrees 5860 and 5861 of 24 April, all related to electricity rules for so-called convergent industries. The Presidency said the objective was to protect the sustainability of the national electricity system, preserve competitiveness and build an industrial model around responsible use of Paraguayan energy.
The distinction between the original and replacement PPAs matters. ATOME said on 10 June that an original variable-rate PPA with ANDE had already been executed. A replacement agreement with fixed-rate terms had been negotiated and its form agreed with ANDE, but it had not yet been executed when the decrees were revoked. The company said execution of that replacement PPA was a condition precedent to first disbursement under the project financing.
This means the dispute should not be reduced to the claim that Paraguay simply cancelled an executed fixed-price electricity contract. The public record is narrower: an existing variable PPA remained in the background, while the fixed-price replacement needed for the financing structure had not been executed before the regulatory framework supporting it was withdrawn.
The government’s stated rationale also matters. The June decision was not presented as a rejection of industrialization. It was presented as an attempt to redesign the framework so that electricity-intensive investment would remain compatible with ANDE’s finances and Paraguay’s future power system.
What is Paraguay’s hydropower actually worth?
This is the central economic question behind the case. A low industrial tariff can attract investment, jobs, exports, engineering activity and local supplier demand. It can also lock the electricity utility into a long-duration price structure that becomes unattractive if the cost of generation rises faster than expected.
ANDE’s former president Félix Sosa said in June that the average cost of Paraguay’s current generation mix was around US$28/MWh and could gradually rise toward approximately US$50/MWh by 2043 as the system incorporates more expensive new generation. That forecast became the utility-side argument against maintaining a low fixed tariff over a long period.
ATOME’s position is different because the project economics require price predictability. ABC Color reported in August that the company had proposed US$35/MWh for the first five years of operation and US$37/MWh for the next five, after which ANDE’s tariff would apply. ATOME also said the time-of-use structure would imply much higher prices during peak hours. ANDE responded publicly that the numbers still did not work from its perspective.
Those figures should not be compared as if one number alone settles the debate. ANDE’s generation cost, an industrial retail tariff, peak-hour pricing, transmission costs, future capacity requirements and the value of long-term price certainty are different components. The dispute exists precisely because each side is assigning risk and value differently across time.
A power contract can become a financing condition
The ATOME case shows why industrial energy policy and project finance cannot be separated. A project can have an EPC contractor, offtake, equity commitments and development-bank participation while still remaining exposed to one unresolved contractual input.
ATOME’s 10 June update stated that execution of the replacement PPA was part of the conditions precedent before first disbursement. This is the practical meaning of bankability: financing can be arranged without all cash being drawable. The project must still satisfy the contractual conditions that lenders require before funds are released.
This distinction is important for reading large South American projects. FID, signed financing documents, approved credit, first disbursement, notice to proceed, construction and commercial operation are separate milestones. Treating them as one event produces false certainty about project status.
For suppliers, contractors and local service companies, the distinction is commercially relevant. Procurement preparation can start before first disbursement, but the scale and timing of executable contracts can change rapidly when a core financing condition remains unresolved.
The legal dispute has started procedurally, not substantively
On 17 September, ATOME served a Notice of Dispute and Intent to Submit a Claim to Arbitration under the 1981 UK–Paraguay bilateral investment treaty. The treaty is in force and entered into force in 1992.
ATOME alleges that Paraguayan acts and omissions violated the treaty, including revocation of presidential decrees that the company says supported the project and provided certainty on PPA term and price. The company says the potential claim has been independently assessed as very substantial and has indicated that it could proceed to ICSID arbitration if no viable resolution is achieved.
Those are ATOME’s claims, not established legal findings. Paraguay’s Attorney General’s Office responded that no lawsuit or arbitration has yet been initiated, that the State is analyzing the company’s arguments and that the notice creates a three-month period to explore an amicable solution. The government has not yet published a substantive legal response to the merits of ATOME’s allegations.
As of 18 September 2026, there is an investment dispute notice, not an arbitration award and not yet an initiated arbitration proceeding.
The next material question is whether the parties can reach a new electricity arrangement during the three-month consultation period or whether ATOME proceeds with a formal claim.
The real issue is Paraguay’s industrial model
The legal dispute matters, but the larger market issue is how Paraguay uses electricity to create domestic value. IFC’s financing announcement described Villeta explicitly as part of the country’s long-term objective of transforming abundant renewable energy into higher-value industrial production.
That logic extends beyond ATOME. Paraguay is attracting data centers, manufacturing projects, energy-to-X proposals and other electricity-intensive investments. Econosur’s Paraguay manufacturing analysis shows a wider industrial strategy built from several models: Brazil-linked maquila production, domestic resource processing and greenfield industrial platforms. Cheap and reliable electricity can support all three, but each creates a different amount of local employment, supplier demand, technical capability and retained value.
For policymakers, the relevant metric is therefore not simply megawatts sold or investment dollars announced. The harder question is what Paraguay receives in return for committing electricity over a long period: industrial output, tax revenue, jobs, skills, infrastructure, export diversification, local supplier depth and a stronger regional value-chain position.
The opposite question matters too. If the tariff is set so high or remains so uncertain that the project cannot be financed, Paraguay may protect the utility’s near-term economics while failing to convert its power advantage into new industry. Industrial policy is the management of that trade-off, not the elimination of it.
Villeta also sits inside a regional fertilizer-security problem
The project is relevant beyond Paraguay because fertilizer is a regional agricultural input. IFC states that the Mercosur region imports more than 90% of its nitrogen fertilizer demand. IDB Invest expects around 90% of Villeta’s projected annual output to be exported, with the project strengthening agricultural value chains in Paraguay, Argentina and Brazil.
Villeta therefore offers a different route to regional nitrogen capacity from Argentina’s gas-based projects. Econosur’s Vaca Muerta to Urea analysis examines how Argentina can turn natural gas into ammonia and urea. Villeta would instead turn hydropower into hydrogen, ammonia and calcium ammonium nitrate.
The technologies and cost structures differ, but the strategic question is similar: can South America convert domestic energy resources into agricultural inputs that reduce dependence on long-distance imports?
This also links the project to Econosur’s wider Agriculture & Food Systems framework. Fertilizer security is not separate from agricultural competitiveness. Input availability, price volatility, logistics and regional production capacity affect the resilience of the entire food system.
What investors and industrial suppliers should watch next
The first signal is the electricity agreement itself. A new PPA or other tariff mechanism would show whether the parties have found a way to divide long-term electricity-price risk. The details matter more than a headline agreement: tariff level, indexation, time-of-use structure, duration, capacity reservation and adjustment mechanisms determine the actual economics.
The second signal is financing disbursement. A resolution that satisfies lenders and allows the project to move through its remaining conditions precedent would be stronger evidence of execution than a political statement of support.
The third signal is physical project activity. EPC mobilization, major equipment orders, civil works, grid-connection works and site construction would show that Villeta has moved from financed project to active industrial buildout.
The fourth signal is policy spillover. Paraguay is simultaneously redesigning the framework for large electricity users. The solution reached with ATOME could influence how future data centers, hydrogen projects, industrial plants and other high-load users evaluate the country.
The fifth signal is legal escalation. If the three-month consultation period closes without an agreement and ATOME proceeds to arbitration, the case would move from a commercial-regulatory dispute into a formal international investment proceeding. That would make the legal treatment of regulatory change part of Paraguay’s investment-risk discussion.
Conclusion
ATOME’s Villeta project exposes the central difficulty in Paraguay’s next stage of industrial development. The country’s electricity advantage is valuable precisely because it is scarce in the form that industrial investors need: large volumes, reliable delivery and predictable long-term pricing.
Paraguay can use hydropower as an export commodity, a low-cost domestic input or a platform for higher-value industrial production. Each option assigns value and risk differently. Villeta forces those choices into one project because electricity dominates the production economics, the financing depends on tariff certainty and the State must still protect the future sustainability of the power system.
The three-month dispute window may produce a negotiated solution or lead to arbitration. Either way, the more important long-term outcome will be the framework Paraguay builds for the next industrial investor that asks the same question: what is long-term Paraguayan power worth?
I would not read the ATOME case mainly as a legal dispute. I would read it as a pricing problem inside Paraguay’s industrial strategy.
Paraguay’s hydropower advantage becomes more valuable when electricity can be converted into products, jobs and industrial capability. But the conversion only works if the electricity contract is attractive enough for the investor and defensible enough for the public power system.
The difficult part is the time horizon. An industrial project needs ten or fifteen years of visibility because lenders and shareholders finance a plant against future cash flow. ANDE has to think about the same period from the opposite side: future demand, future generation costs and the opportunity cost of committing capacity today.
That is why the dispute matters beyond one company. Paraguay is trying to move from having cheap power to having an industrial policy for cheap power. Those are not the same thing.
For companies, investors and suppliers evaluating Paraguay, the useful questions are more specific than whether the country has abundant hydropower.
- Which electricity tariff applies to a specific industrial load, and how can it change over the project life?
- Which parts of a project depend on presidential decrees, ANDE resolutions, negotiated contracts or general tariff schedules?
- Is power capacity merely discussed, formally reserved, contractually secured or physically deliverable at the project site?
- Which financing conditions must be satisfied before lenders can disburse?
- What local value does the project create relative to the electricity capacity committed to it?
- Which contractors, suppliers and service providers become relevant only after the power and financing conditions are resolved?
- How would a tariff or regulatory change alter the project’s competitiveness against Brazil, Argentina, Chile or other locations?
Econosur can investigate the commercial questions behind projects like Villeta where public announcements do not by themselves establish bankability, execution status or supplier access.
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Paraguay Country Reports provide a broader country framework for energy, infrastructure, agribusiness, maquila, logistics, regulation and commercial risk.
Research boundary
Legal boundary. This is an economic and market analysis, not a legal opinion. ATOME’s alleged treaty violations are claims by the company. No tribunal has ruled on the merits, and Paraguay’s Attorney General’s Office states that no arbitration has yet been initiated.
Contract boundary. Public disclosures distinguish between an original variable-rate PPA executed in 2022 and a later fixed-rate replacement whose form ATOME says had been agreed but had not yet been executed when the 2026 decrees were revoked. This analysis does not assume contractual rights beyond what the cited public sources establish.
Tariff boundary. ANDE generation-cost estimates and reported ATOME tariff proposals are not directly comparable without the full tariff model, time-of-use structure, network costs, indexation and contractual allocation of risk.
Financing boundary. ATOME’s US$665 million figure refers to its announced debt-and-equity financing arrangement. IDB Invest describes approximately US$650 million of direct investment and a US$420 million debt package. Financing arranged or signed does not automatically mean that all funds have been disbursed.
Status boundary. Project, tariff and dispute status in this article is based on public information available through 18 September 2026. Negotiations remain active and can change quickly.
Company, government, utility and treaty documents
- ATOME PLC — Notice of Dispute & Arbitration Intent, 17 September 2026 — ATOME’s statement of its treaty claim, the alleged role of the revoked decrees and its intention to seek an amicable resolution before possible arbitration.
- Government of Paraguay / Attorney General’s Office — statement regarding ATOME, issued 17 September and published by ATOME on 18 September 2026 — confirms no lawsuit or arbitration has yet been initiated and identifies a three-month period for an amicable solution.
- Presidency of Paraguay — energy should generate industry, employment and development, 9 June 2026 — revocation of Decrees 5306, 5307, 5860 and 5861 and the government’s stated electricity-policy rationale.
- ANDE — electricity supply provisions for convergent industries, 7 May 2026 — tariff criteria, adjustment mechanisms and the stated objective of combining investment attraction with electricity-system sustainability.
- ATOME PLC — Villeta Project Update, 10 June 2026 — distinction between the original variable-rate PPA and the negotiated replacement PPA, its financing relevance and the impact of the decree revocation.
- ATOME PLC — Villeta Update, 17 August 2026 — project power status, ANDE discussions and ATOME’s description of its existing 145 MW customer position.
- ATOME PLC — Equity Agreements and FID for Villeta Project, 23 April 2026 — US$665 million financing arrangement, project FID, EPC and financing structure.
- ATOME — 145 MW Villeta project page — project capacity, process, electricity-cost share and technical positioning. Current power-status claims should be read alongside the later PPA dispute disclosures.
- UNCTAD Investment Policy Hub — Paraguay–United Kingdom BIT (1981) — treaty status, signature date and entry into force.
Project-finance institutions
- IDB Invest — financing for Paraguay’s first green hydrogen fertilizer project, 13 March 2026 — approximately US$650 million direct investment, US$420 million debt package, projected output and regional export logic.
- IFC — Paraguay’s first green fertilizer plant, 13 March 2026 — financing structure, jobs, regional fertilizer dependence and the value-added industrialization rationale.
- IFC Disclosure — ATOME Villeta Green Fertilizer — project description, 145 MW facility, 260,000 tpa design capacity and environmental/social project status.
Independent reporting and market context
- ABC Color — ANDE generation-cost outlook and ATOME tariff debate, 10 June 2026 — reports ANDE’s stated current average generation cost of about US$28/MWh and its projection toward approximately US$50/MWh by 2043.
- ABC Color — ATOME proposes stepped tariff up to US$37/MWh, 27 August 2026 — reports the US$35/MWh and US$37/MWh proposal, later tariff treatment and ANDE’s response.
- ABC Color — investment-certainty and reputational-risk discussion, 6 September 2026 — useful clarification that the final replacement electricity agreement had remained pending while the regulatory framework changed.
- ABC Color — Attorney General clarification on dispute status, 18 September 2026 — confirms that the current step is a dispute notice rather than an initiated arbitration.
- Última Hora — Paraguay response to ATOME dispute, 18 September 2026 — local reporting on the Attorney General’s statement and the three-month consultation period.
- EQS News — full ATOME notice distribution, 17 September 2026 — reproduces the company’s notice including its allegation concerning the revoked presidential decrees.
- Econosur analysis based on public project, regulatory, financing and market information available by 18 September 2026.
Evidence note: project status, decree changes, financing structure and dispute procedure are anchored first in company, government, utility, treaty and development-finance sources. Secondary reporting is used for tariff proposals, quoted ANDE cost assumptions, local political context and clarification where the full underlying commercial documents are not public.
Frequently asked questions
Has ATOME already started arbitration against Paraguay?
No. On 17 September 2026 ATOME served a Notice of Dispute and Intent to Submit a Claim to Arbitration. Paraguay’s Attorney General’s Office stated that no lawsuit or arbitration had yet been initiated and that the notice opens a three-month period to explore an amicable solution.
What is the ATOME Villeta project?
Villeta is a planned 145 MW low-carbon fertilizer project in Paraguay designed to produce roughly 260,000 tonnes per year of calcium ammonium nitrate using renewable hydropower. ATOME announced Final Investment Decision in April 2026 after arranging US$665 million of debt and equity financing, while IDB Invest described the direct investment as approximately US$650 million and the debt package as US$420 million.
Why is electricity pricing central to the project?
ATOME states that renewable electricity represents roughly 60–70% of Villeta’s production cost. The company therefore requires long-term price visibility for project financing and operating economics. ANDE, meanwhile, has argued that its generation cost is expected to rise as Paraguay adds more expensive new supply.
Did Paraguay cancel an executed fixed-price PPA with ATOME?
The public record is more specific. ATOME says an original variable-rate PPA had been executed in 2022. A replacement PPA with fixed-price terms had been negotiated and its form agreed, but ATOME stated on 10 June 2026 that it had not yet been executed when the relevant presidential decrees were revoked.
What tariff did ATOME propose after the June 2026 reset?
ABC Color reported that ATOME proposed US$35/MWh for the first five operating years and US$37/MWh for the following five years, with ANDE’s tariff applying from year 11. The proposal was reported as part of continuing negotiations and was not an executed tariff agreement.
Why does the case matter beyond ATOME?
The dispute tests Paraguay’s wider strategy of converting hydropower into higher-value industrial production. It raises questions about electricity allocation, long-term industrial tariffs, grid investment, regulatory stability and how much value Paraguay should retain when power is used as a major industrial input.
How does Villeta fit into South America’s fertilizer market?
IDB Invest expects around 90% of Villeta’s projected output to be exported, while IFC has emphasized the Mercosur region’s dependence on imported nitrogen fertilizer. Villeta therefore connects Paraguay’s hydropower strategy with regional agricultural-input security and industrial diversification.
