Argentina's drinking water and sewage utility AySA moved into the final stretch of its privatization process, with the concession plan carrying US$2 billion in investments tied to operations in the Buenos Aires metropolitan area, BNamericas reported on 6 October 2026 (BNamericas). AySA — formally Agua y Saneamientos Argentinos — is the country's main drinking water utility, and the Buenos Aires concession is one of the asset sales the government is using to deliver a broader US$2 billion privatization programme by year-end, according to Economy Minister Luis Caputo (MercoPress).
Key takeaways
- AySA's privatization has entered its final stretch, with US$2bn in investments attached to the concession, per a 6 October 2026 report (BNamericas).
- The Economy Ministry approved the drinking-water and sewage concession contract model for the Buenos Aires metropolitan area through Resolution 543/2026 (MercoPress).
- Minister Luis Caputo framed the wider programme, including AySA, as part of a US$2 billion privatization and concession revenue plan to be completed by year-end (MercoPress).
- The privatization drive is tied to Argentina's Extended Fund Facility with the IMF, signed in April 2025 and totalling US$20 billion in disbursements (MercoPress).
What happened: AySA concession clears a regulatory milestone
According to BNamericas' 6 October 2026 report, the AySA concession has moved into its final stretch, with the privatization plan carrying US$2 billion in investments (BNamericas). The same utility — Agua y Saneamientos Argentinos — was named by Economy Minister Luis Caputo in remarks reported on 28 April 2026 as one of the companies in the government's privatization and concession timetable, alongside Transener, Intercargo, Belgrano Cargas, the Manuel Belgrano and San Martín thermal power plants, and the Mint (MercoPress).
A concrete step on AySA was taken on the same day as Caputo's remarks: the Economy Ministry approved through Resolution 543/2026 the contract model for the concession of drinking water and sewage services in the Buenos Aires metropolitan area, "a key step in the AySA privatization process," MercoPress reported (MercoPress). Caputo, quoted by MercoPress, said: "We are carrying out privatizations and concessions. The plan is to wrap them up by year-end. This will generate revenue of $2 billion" (MercoPress).
What it means inside the US$2bn programme
The AySA concession sits inside a broader pipeline of asset sales. On the same April 2026 day, three financial bids were opened to acquire 50% of Citelec, the controlling company of Transener, the largest high-voltage electricity transmission operator, with the highest offer — from a Genneia and Edison Transmisión consortium — at US$356.17 million; Central Puerto at US$301 million; and Edenor at US$230 million (MercoPress). Caputo also said concessions for some 9,000 kilometres of national road corridors would be awarded between June and July, with bidding to be launched for an additional 12,000 kilometres, and the list also includes the Paraguay-Paraná Waterway, the Retiro bus terminal, Yacimientos Carboníferos de Río Turbio (YCRT), Nucleoeléctrica Argentina, and the SOFSE passenger rail operator (MercoPress).
| Asset / process | Sector | Reported value | Status (as reported) |
|---|---|---|---|
| AySA concession — Buenos Aires drinking water & sewage | Water & sewage | US$2bn investment envelope (BNamericas, 6 Oct 2026) | Final stretch; contract model approved via Resolution 543/2026 |
| Transener (via 50% of Citelec) — highest bid | High-voltage transmission | US$356.17 million | Financial bids opened 28 April 2026 |
| Transener — Central Puerto bid | High-voltage transmission | US$301 million | Financial bids opened 28 April 2026 |
| Transener — Edenor bid | High-voltage transmission | US$230 million | Financial bids opened 28 April 2026 |
For water and sewage operators and equipment buyers, the AySA concession is the wastewater-relevant item in that pipeline. The privatization push itself is part of the commitment Argentina made when it signed an Extended Fund Facility with the IMF in April 2025, totalling US$20 billion in disbursements, with state-asset revenue a projected source for meeting programme targets (MercoPress).
Specification read
The supplied reports do not break the US$2bn AySA envelope into cubic metres per day, population equivalent, or a treatment-train specification, so the engineering read below is built on what the sources actually say. The headline figure is an investment envelope of US$2 billion attached to drinking water and sewage services in the Buenos Aires metropolitan area, as reported on 6 October 2026 (BNamericas). The earlier 28 April 2026 report adds that the contract model approved by Resolution 543/2026 covers both drinking water and sewage services, identifying the Buenos Aires metropolitan area as the concession perimeter (MercoPress). Because neither outlet publishes a stated plant capacity in m³/day, a stated population equivalent, or stated influent BOD/COD figures, the daily hydraulic loading for the AySA assets and the influent quality that any bidder will have to design against are not specified in the supplied sources; any specific m³/day, PE, or mg/L figure used in tender evaluation cannot be cited from this reporting.
For a concession of this class — metropolitan Buenos Aires drinking water plus sewage — the standard procurement treatment train buyers will expect bidders to underwrite is screening and grit removal, primary clarification, biological treatment (typically A2O, MBR, MBBR, SBR, or UASB depending on footprint and effluent targets), tertiary polishing (often DAF or sand filtration) and disinfection (chlorination or UV), with sludge handling sized to the population served. The event itself is a concession contract approval, not a tender for a specific process unit, so it bears most directly on the asset-level decisions (collection, biological stage, tertiary, disinfection) a private operator will be asked to fund and operate under the new contract model. In the supplied sources, none of the US$2bn envelope is tied to a specific unit process, so the treatment-train allocation cannot be quoted from these reports.
If your plant is a Municipal drinking water and sewage concession in a metropolitan catchment, with the operator expected to take over screening through disinfection plus sludge handling under a multi-year capex commitment, this is the contract shape you will be pricing against under the approved Resolution 543/2026 model. Buyers scoping biological-stage equipment for a Buenos Aires-class catchment should look at integrated sewage treatment packages centred on water purification and disinfection skids, while those comparing containerised or packaged options can use the related guides on packaged sewage treatment plants for Brasília housing and rural sewage treatment in Qatar as reference configurations. For a factory-side parallel in Argentina, the Córdoba industrial ETP and DAF guide covers the pretreatment-heavy end of the same supplier base.
FAQ
What is the headline figure attached to the AySA concession?
The 6 October 2026 report ties US$2bn in investments to the AySA privatization plan, as reported by BNamericas (BNamericas). The supplied sources do not break this envelope down by plant, lot, or unit process, so a per-asset or per-m³/day figure cannot be quoted from the reporting.
What regulatory step has the AySA concession already cleared?
The Economy Ministry approved the contract model for the concession of drinking water and sewage services in the Buenos Aires metropolitan area through Resolution 543/2026, MercoPress reported on 28 April 2026 (MercoPress). The 6 October 2026 BNamericas report then describes the process as entering its final stretch (BNamericas).
What is the next procurement milestone suppliers should watch?
The supplied sources do not name a specific tender date or lead time for AySA equipment packages; they describe the broader privatization programme as intended to wrap up by year-end, per Caputo's remarks reported by MercoPress on 28 April 2026 (MercoPress). A specific equipment-tender opening date is not reported in the supplied sources.
How should a buyer size a bid for a Buenos Aires-class sewage concession?
The supplied sources do not publish a stated hydraulic capacity, population equivalent, or influent BOD/COD for the AySA assets, so any specific sizing number used in an enquiry has to come from the concession's own technical annexes rather than from this reporting. What the sources do confirm is that the concession covers both drinking water and sewage services across the Buenos Aires metropolitan area, which is the design perimeter a bidder would price against (MercoPress).
