Hydrogeology, glaciology and independent water auditing for the San Juan cordillera
The Glacier Law reform, enacted on 24 April 2026, turned a general prohibition into a technical question: what is inventoried stays protected until the provincial authority proves through technical studies that the ice does not fulfil a hydrological function, and the inventory is defined by the provinces. The study no longer has to convince an office: it has to hold up in a tribunal thesis. And beneath the litigation runs a clock that does not stop —every operator resubmits its environmental report every two years— and, above all, a magnitude no page was publishing and which puts it in scale: the technical report of the province's largest project says the district will need between 2,000 and 2,500 litres per second of make-up water in the long term, and that desalinated water weighs about 19 % of its operating cost: USD 3.65 per tonne of total throughput, out of a total of USD 19.60 per tonne. ⚠️ But the same document puts a ceiling on the aquifer work: groundwater is replaced by desalinated seawater in stage 3, brought by a 290 kilometre pipeline from the Chilean coast.
It is one of the few niches whose demand does not depend on a job starting: it is already running. The Glacier Law reform was enacted on 24 April 2026 and was taken to court eleven days later, with two injunctions requested and none resolved.See the clocks that are running, one by one
On this page
What the market is made of
The split here has an unusual shape: what is captive is the signature, not the work. The integrated report is signed by an international consultancy and the day-to-day monitoring is done by the mine's own team. But everything feeding those two —the field data, the sensor network, the laboratory work and the expert evidence— is open, and the speciality the reform made compulsory barely has local supply.
Each project's integrated environmental impact report, signed by an international consultancy with professional indemnity cover, and the day-to-day monitoring done by the operator's own environmental team.
The periglacial and glaciological baseline, the piezometer network with telemetry, the biennial update, water and soil laboratory work, and party-appointed technical expert evidence.
Running the monitoring network at a single site, or signing the expert report for one file. Both enter through speciality and registration, not scale.
Why we do not put a number on it There is no published fee against which to measure an entry slice. We looked where it turned up in the neighbouring province —the professional councils— and the two San Juan ones are of no use: the geological sciences council returns an error across the whole site, including its registered-members page, and the specialist engineers' council only allows one-by-one lookups by surname or licence number. The Colegio de Ingenieros Civiles does publish a fee schedule, but it covers civil works and does not include the environmental study. And the only universe of assignments the provincial government publishes —the 79 environmental assessments up to September 2025— turns out to be the wrong denominator: none of those 79 is from a large project, because medium and large-scale projects are assessed by a different commission. With the wrong denominator and the price unpublished, any entry slice would be a figure invented to fill the line.
Who really pays?
Three payers, and the third only appeared in May 2026:
It is the predictable door and the one that does not depend on the litigation. In March 2026 Vicuña obtained approval of the first and second updates of Josemaría's environmental impact report. The clock is set by the Código de Minería, which requires the environmental impact declaration to be updated at least every two years verif: it runs for every site with a live report, although there is no public calendar of when each one falls due.
Here the pressure comes from the regulator: the Policía Minera inspects on the ground what the environmental impact declarations require verif, and water extraction from the well fields requires regulatory approval.
It is the new door. The class action against the reform is from 5 May 2026 and the request for an injunction over glacier GE110, from 23 June. What is bought while that proceeds is an opinion that survives a challenge.
Which projects move this demand
Leach-based copper cathode project in Calingasta (San Juan). Company/press figures (probable, outside the resolution)…
see the project →The largest mining project in Argentine history by announced investment, and, according to the operator…
see the project →Phase 1 of one of Argentina's two largest undeveloped copper deposits, alongside Vicuña: a resource declared by Glencore of ~6,000 Mt @ 0.43% Cu, 2.2 g/t Ag and 130 g/t Mo…
see the project →When the window opens
This niche's demand is created by a rule, a judicial file and a water balance. These four figures say how much solving it is worth and until when.
See the evidence
See the evidence
See the evidence
See the evidence
There is a class action filed on 5 May 2026 with two injunctions requested and none resolved as of 9 October 2026: the court had only declared itself competent prob claimant organisation.
See the evidence
The provincial directorate assessed 79 environmental reports in 2025 up to September and, according to the mining press, 105 over the whole year, against 45 in 2024.
See the evidence
The fee band used is the one our own Salta entry publishes, and that entry states its fee is a pure assumption.
See the evidence
Josemaría's declared structural plan is to bring in desalinated Pacific water by aqueduct, and the March 2026 technical report expects the desalination plant to be available around year 8, for the sulphide expansion that starts in year 9 verif technical report.
See the evidence
See the remaining 3 risks
There are four or five operators. A single badly finished contract closes the whole market, and the state's technical counterparty is always the same one. In a business that sells credibility, reputation is not an intangible: it is the asset.
Ley 2827-M requires 24 months of seniority to qualify as local in the department of influence and 12 in the rest of the province. A consultancy setting up in 2026 does not count as a San Juan supplier towards local purchase targets until 2028, even though the demand is running now.
The technical study says, verbatim, that water «is initially supplied from underground aquifers» and that water brought by pipeline from a desalination plant on the coast is planned to be available in stage 3 and will be used instead of groundwater, with the latter left as additional make-up water if needed.
See the evidence
The opportunity in depth
The opportunity in depth
Glaciology and the periglacial environment, which is the speciality the reform made compulsory and which barely exists in the country. The national body was left in a registry role, and we did not identify a single local consultancy declaring the speciality in the registers we reviewed — the only one named in the coverage of the province's glacier studies is Chilean. It is the highest-margin layer and the hardest to enter, because it is bought on track record.
Party-appointed expert evidence, which before May 2026 was not a market. With two injunctions requested and none resolved, the study stopped being paperwork and became evidence. It is contracted by the law firm, billed differently, and requires a signatory who can survive a challenge.
Independent water auditing: the third party that certifies the company's data. It has no declared supply in the province. And its value is not technical but reputational: in a territory still carrying the 2015-2017 Veladero spills and an active assembly in Jáchal, a figure signed by the operator itself does not close the argument.
The monitoring network with continuous reporting — and there are already people asking for it out loud. A high-mountain climate specialist warned on 14 September 2026 that the public stations are too widely spaced to decide logistics with them, and asked companies to systematise and share the data from their own camps with operational risk indices. Installing and running monitoring wells and stations with continuous reporting does not require an expert's signature: it requires being nearby and not failing.
⭐ And there is hydrogeological work with a deadline, which the project itself published. Its technical study says that the drilling and the testing have already identified three aquifers that will be exploited with well fields operating two years before the mine produces, that the extraction requires regulatory approval, and that there is numerical modelling under way in one of those fields to support its permit. Infiltration galleries on two rivers are also being investigated as supplementary inland sources.
When you get paid, and what blocks it
already in
split
The environmental impact report for a multi-billion-dollar project is signed by a consultancy with professional indemnity cover and an international track record. That piece is not contested from a provincial small firm. What is contested is everything that feeds it: the field data, the monitoring network and the laboratory work.
In operation, much of the monitoring is done by the company itself. It is the hardest incumbent to displace, which is why the way in is not replacing it: it is the layer the operator cannot sign off on its own, which is exactly the one that gains value when the data get argued about outside.
The reform left it in a registry role and handed the provinces the task of defining what gets protected. It stopped being the decider and it is not a commercial competitor: it is the register against which a party's study is later checked.
They do not compete for the private contract: they are the technical counterparty whose objections have to be answered. That INA-CRAS objected to the insufficiency of Josemaría's hydrogeological data is reported in the press unconf.
The jobs it createsIt is one of the few niches where the service and the social license point the same way. San Juan still carries the 2015-2017 cyanide solution spills at Veladero and an active assembly in Jáchal.the detail on jobs and trades
calculate it
The number is our own estimate. The calculation, step by step, is below.
The full calculation, step by step
Concentration Concentration is split in two, and the bottom half is the empty one. A large project's environmental impact report is signed by an international consultancy and that does not move. But in the speciality the reform made compulsory —glaciology and periglacial environment— we did not identify any declared local supply: none of the 187 members of the mining services chamber, nor of the 40 published by the suppliers' chamber, declares it, and the only consultancy named in the coverage of the province's glacier studies is Chilean. The national glaciology body was left in a registry role. And there is a third layer with no declared supply: independent water auditing, meaning the third party that certifies the company's data before a neighbour, a judge or a regulator. In a province still carrying the 2015-2017 cyanide solution spills and an active assembly in Jáchal, that credibility has a price.
The rule that moves it
Here the rule does not accompany the demand: it creates it. And a second one decides who can invoice it:
See the underlying reading
The underlying policy that opens up this demand. It is the same inference declared by the rules and the program pillars pushing in this direction.
opening and deregulationSee the full legal grounds
See the full legal grounds
Where the number comes from
~USD 6.5 M/yr at the midpoint; the defensible band is USD 2-11 M/yr. It is wide, and both reasons are stated: 2025 was a record year for assessments and the real fee for the study is not published
See the calculation, the variables and how it was validated
The figure is built from three clocks running in parallel and independent of one another. If one stops, the other two keep going.
The number rests on a few variables. The formula shows how it moves when each one changes; and each variable carries its freshness seal — how often it is worth revisiting. estim
This figure is counted in deliverables per year, not as a percentage of anything. The universe comes from three separate clocks: the 79 environmental assessments the provincial assessment directorate declares, the compulsory biennial update of each impact declaration, and the four cordilleran projects the reform obliges to prove hydrological function. And there are two limits we state rather than hide. The first is a denominator, and it is bounded: the 79 are from 2025 up to September —nine months, which annualized come to about 105, the same the mining press published for the whole year—, and since 2025 was a record against 45 in 2024, the calculation uses 45 to 105 a year. The second is price: we could not get a published fee for the study. We went looking for it at the professional council, which is where it turned up in Salta, and the two sites we tried do not open; the Colegio de Ingenieros Civiles schedule covers civil works. That is not a proven absence, it is a gap, and we leave it written with both names so it can be picked up. In the meantime we use the same fee band we already publish on the Salta page for the same field, which also declares itself an assumption of our own.⛔ And three more things, which change how the number is read.(1) Those 79 assessments are not the denominator for the large projects. The Ministerio de Minería's official press says they run up to September 2025 and —this is what changes the reading— that none is from a large project: 21 prospecting, 28 exploration and 30 small-scale exploitation, because medium and large-scale ones are assessed by a different interdisciplinary commission. Using that 79 to talk about oversight capacity over the large projects would be using the wrong number.(2) The litigation already has rulings, and not all of them go the same way. Before 16 July 2026 there were at least three: one injunction granted in Santa Cruz on 24 April, overturned on appeal on 1 June for considering the danger in delay «remote», and another rejected in La Pampa on 8 May. What does remain unresolved are the two injunctions of the class action, including the glacier one: as of 9 October 2026 the court had only declared itself competent, according to one of the claimant organisations themselves.(3) And the physical magnitude of the water is published, in the large project's technical report, downloaded and read in full: 2,000 to 2,500 litres per second of make-up water for the district in the long term, USD 4.05 per cubic metre of water delivered and about 19 % of the operating cost (3.65 out of 19.60, our own arithmetic). ⚠️ That is not mixed with the 515 → 1,200 litres per second in circulation: that one is the same deposit compared with itself in its own environmental file between 2021 and March 2026, and with the words «external make-up water» alongside, which is not the same as consumption.
Coverage: the rosters of San Juan's two mining supplier chambers —187 CASEMI members and 40 published by CAPRIMSA— and a search on environmental consultancy, glaciology, periglacial environment and baseline studies · Sep 14, 2026 · not reviewed: the universe that would really count could not be opened: the professional council of geological sciences returns an error across its whole site, including the page of licensed members, and the specialist engineers' one only allows queries one at a time by surname; the Colegio de Ingenieros Civiles fee schedule covers civil works
How to cite this figure: Despegue (2026). Hydrogeology, glaciology and independent water auditing for the San Juan cordillera · San Juan. despegueargentina.com/en/san-juan/hidrogeologia-glaciologia-auditoria-hidrica · terms of use
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