Who gains from saving nature
Ledger 1 : 33 — For each dollar financing nature-based solutions in 2023, about $33 financed activities harmful to nature. (UNEP)
Cases / Cyanide spill · Romania · 2000–2009

Baia Mare cyanide spill

Nature's voice · report
About 100,000 cubic metres of mine waste were released onto my land and into my rivers.
Index.hu gives 100,000–120,000 m³.
Did nature suffer? Yes. Harm is on record.
Recorded
  • Up to 100 tonnes of cyanide entered my rivers.
    UNEP/OCHA range 50–100 t; some secondary sources give 120 t.
  • About 2,000 km of my rivers were polluted.
    Danube catchment affected (UNEP/OCHA).
  • 1,240 tonnes of my fish died.
    Hungary only (Hungarian estimate). Conflicting figure: about 200 t.
What the record lacks: 8 none on record · 2 insufficient · 4 unclear See the gaps

A tailings dam at a gold-recovery plant in Romania broke in January 2000. Cyanide reached the Danube through Hungary and Serbia; Hungary's damages claim ended without a defendant.

$100m / $0Claimed by Hungary vs received
Claim of HUF 28.6bn (about $100m) filed 2001; closed for lack of a defendant.
What?
On 30 January 2000 a tailings dam at the Aurul SA gold-recovery plant near Baia Mare, Romania, was breached, releasing about 100,000 m³ of waste containing about 50–100 tonnes of cyanide and heavy metals. The plume travelled through the Someș/Szamos and Tisza into the Danube and reached the Black Sea about four weeks later. Regional Environmental Center (REC)
Where?
The Aurul tailings pond at Bozânta Mare near Baia Mare, Maramureș, north-western Romania; downstream along the Săsar, Lăpuș, Someș/Szamos and Tisza through Hungary and Serbia into the Danube and the Black Sea. Regional Environmental Center (REC)
When?
Breach on 30 January 2000 at 22:00; plume at the Hungarian border on 1 February and in Belgrade on 14 February; plant restarted on 13 June 2000. Hungary sued in 2001; Budapest liability ruling on 8 May 2006; company struck off on 27 May 2008; human-rights court judgment on 27 January 2009.
Who?
Gained
  • Aurul SA (Esmeralda Exploration 50%, Remin about 45%) — A plant designed to recover about 1.6 t of gold and 9 t of silver a year, worth about US$15.8m a year at 2000 prices (estimate from design capacity; actual output not found); it restarted on 13 June 2000 and ran to about 2005 Regional Environmental Center (REC)
  • Eurogold (formerly Esmeralda Exploration) — About A$2.2m from Transgold's liquidation proceeds (quarter to 31 March 2007) Eurogold Ltd
  • Eurogold (formerly Esmeralda Exploration) — US$7.95m paid by Oxus in 2006 for a cancelled deal Economedia.ro
  • KazakhGold / Oxus Gold — Took over the plant in 2006; the liquidator accepted a US$7.3m offer (Economedia gives US$6.99m) Economedia.ro
Lost
  • Hungarian state — Claimed about HUF 28.6bn (about US$100m) in 2001 and received nothing after the defendant was struck off in 2008 Index.hu
Harmed
  • Fish in the Hungarian stretches of the Szamos and Tisza — About 1,240 tonnes killed (Hungarian estimate; another source gives about 200 t) Regional Environmental Center (REC)
  • Plankton in the affected rivers — Completely killed as the wave passed; recovered within a few days (UNEP/OCHA) Regional Environmental Center (REC)
  • About 2 million people — Drinking water temporarily contaminated Christian Science Monitor
  • 24 Romanian municipalities; Szolnok (Hungary) and Belgrade water intakes — Water supply interrupted in Romania; the Szolnok and Belgrade intakes were closed Regional Environmental Center (REC)
  • Danube catchment — Some 2,000 km affected; the first Hungarian reading, at Csenger, was 32.6 mg/l of cyanide, more than 320 times the limit Index.hu
Why?
UNEP/OCHA attributed the breach to heavy rain and fast snowmelt raising the pond faster than the dam was being built up, together with design defects and no plan for overflow, and found the company operating within its permits. Romanian prosecutors closed the criminal case in 2002 citing weather as force majeure; the European Court of Human Rights found Romania had failed to assess the risks in advance. Regional Environmental Center (REC)
How?
The plant reprocessed old tailings with cyanide to recover gold and silver and held the waste behind a dam; when the dam broke, cyanide-laden water flowed down the river system across three countries. A Budapest court found the company liable in 2006, but it went bankrupt and was struck off, and the claim closed without payment. Index.hu
In proportion The liquidator's US$7.3m sale price was about a quarter of the plant's US$28m construction cost (estimate). Economedia.ro
6 of 6 questions answered from the record

What happened

The record, in order.

On 30 January 2000 at 22:00 a dam was breached at the tailings pond of Aurul SA at Bozânta Mare, near Baia Mare in north-western Romania. About 100,000 m³ of liquid and suspended waste was released, containing about 50–100 tonnes of cyanide and heavy metals including copper.

Aurul was owned 50% by Esmeralda Exploration of Perth, Australia, and about 45% by the Romanian state company Remin. Its plant was built for $28m to reprocess old tailings, recovering about 1.6 tonnes of gold and 9 tonnes of silver a year. UNEP/OCHA found the company was operating within its permits, but recorded design defects and no plan for overflow.

The plume travelled down the Săsar, Lăpuș, Someș/Szamos and Tisza into the Danube, reaching Belgrade on 14 February and the Black Sea about four weeks after the breach. Some 2,000 km of the Danube catchment was affected. At Csenger, the first Hungarian reading was 32.6 mg/l of cyanide, more than 320 times the limit.

Hungary estimated 1,240 tonnes of fish killed. Water supply was interrupted in 24 Romanian municipalities, the Szolnok intake in Hungary was closed, and the Belgrade intake was closed. About 2 million people had their drinking water temporarily contaminated. On 10 March 2000 a second tailings dam, at Remin's lead–zinc operation in Baia Borșa, also broke.

The plant restarted on 13 June 2000. Hungary sued in 2001; a Budapest court found the company, by then renamed Transgold SA, liable in 2006. Transgold went bankrupt that year and was struck off in 2008, and the case closed without payment. In 2009 the European Court of Human Rights found that Romania had failed to assess the risks and to inform the public.

  1. 1996Aurul SA founded (4 Apr): Esmeralda Exploration 50%, Remin 44.8%, Geomin 5%
  2. 1999Plant begins operating (May)
  3. 2000Dam breach (30 Jan); plume at Hungarian border (1 Feb), Belgrade (14 Feb); Baia Borșa dam breaks (10 Mar); plant restarts (13 Jun)
  4. 2001Hungary files damages claim in Budapest (26 Apr); Aurul renamed Transgold SA (7 Nov)
  5. 2002Romanian criminal case closed on grounds of force majeure (12 Dec)
  6. 2003Supreme Court prosecutor orders the case resumed (29 Jan); EU Directive 2003/105/EC names Baia Mare (16 Dec)
  7. 2006Transgold bankrupt (Feb); Budapest interim judgment on liability (8 May); liquidator accepts $7.3m offer for the plant (21 Dec)
  8. 2008Transgold struck off the register (27 May); Hungarian case closed for lack of a defendant
  9. 2009European Court of Human Rights, Tătar v. Romania: violation of Article 8 (27 Jan)
  10. 2016Eurogold, formerly Esmeralda, renamed BARD1 Life Sciences
  11. 2023Former Hungarian president says Hungary received nothing

What was said

Claims, in the words of those who made them.

“The entire ecosystem and all life in the Tisza have been destroyed for the next 10 or 15 years.”

Branislav Blažić, Serbian environment minister, as quoted by the Christian Science Monitor · 15 February 2000 · Christian Science Monitor

“The cyanide spill that polluted the Danube following the accident at Baia Mare in Romania in January 2000 has demonstrated that certain storage and processing activities in mining, especially tailings disposal facilities, including tailing ponds or dams, have potential to produce very serious consequences.”

EU Directive 2003/105/EC, recital 3 · 16 December 2003 · European Union

“did not receive a single penny”

János Áder, former President of Hungary, on Hungary's compensation (MTI; translated) · 23 January 2023 · Infostart

How it looked

What was shown, beside what was recorded.

Shown

  • "The greatest environmental catastrophe since Chernobyl" (press, 2000; no speaker named)
  • "Epic poisoning of Europe's rivers" (Christian Science Monitor headline)
  • A Budapest court found the company liable (2006)
  • EU mining-safety rules cite the spill as their trigger (2003)

Recorded

  • UNEP/OCHA: the company was operating within its permits; design defects and no overflow plan
  • Plant back in operation 4.5 months after the spill; ran to about 2005
  • Company bankrupt in 2006, struck off in 2008; Hungary received 0 HUF
  • Australian partner received about A$2.2m from the liquidation proceeds
  • About 95% of aquatic life back in the Szamos and Tisza within 3–4 years

Who gained

Money that reached nature, beside money that stayed elsewhere.

Reached nature or the ground

$0m
No payment to Hungary is documented. A Romanian source says the Romanian state paid; unverified.
Compensation received by Hungary$0m
Window: 2001–2008
Index.hu: "Hungary received 0 HUF".
Restoration paid by the company—
No figure found.

Gained elsewhere

Not totalled
Gold and silver value at design capacity, per year estimate≈ $16m
Window: per year
1.6 t gold × $279/oz + 9 t silver × $4.95/oz (2000 averages). Actual output not found.
Whole planned project at 2000 prices estimate≈ $145m
Window: 10–12 years
480,000 oz gold and 2.2 Moz silver resource.
Plant sold by the liquidator$7.3m
Window: 2006
Paid by Oxus to Eurogold for a cancelled deal$7.95m
Window: 2006
Currency: USD · Window: Mixed — see each line. Figures cover different periods and are not compared as a ratio. * Estimate built from cited figures.

In court and with insurers

Every proceeding and every insurer decision on record.

Lawsuits and rulings

  1. 2001–2006No defendant left$100m claimed
    Hungary v. Aurul / Transgold (damages claim)
    Budapest Metropolitan Court (Fővárosi Bíróság) · Civil · Hungarian state → Aurul SA (renamed Transgold SA, 7 Nov 2001)

    The claim of about HUF 28.6bn was filed on 26 April 2001; an interim judgment of 8 May 2006 held that Transgold bore liability, but the company went bankrupt, was struck off in May 2008 and the case closed without any payment. Origo

  2. 2000–2002Dismissed
    Romanian criminal investigation of Aurul's management (accidental pollution)
    Maramureș prosecutors; Cluj Court of Appeal prosecutors · Criminal · Romanian prosecutors → Aurul board; head of Aurul (M.N.N.)

    Opened on 22 February 2000 under Law 137/1995; a 2001 dismissal was overturned in July 2002, and on 12 December 2002 the case was dismissed again, citing weather as force majeure. European Court of Human Rights

  3. 2003–Outcome not on record
    Romanian criminal case resumed
    Prosecutor's office of the Romanian Supreme Court · Criminal · Romanian prosecutors → Head of Aurul (M.N.N.)

    On 29 January 2003 the Supreme Court prosecutor overturned the force-majeure dismissal and ordered prosecution to resume; no outcome or conviction was found. European Court of Human Rights

  4. 2001Dismissed
    Criminal complaint by the Tătar family
    Romanian prosecutors · Criminal · Tătar family (later ECHR applicants) → Aurul SA

    The complaint was dismissed on 20 November 2001 on the ground that the facts did not constitute offences. European Court of Human Rights

  5. 2001–2009Claimant won€0.01m awarded
    Tătar v. Romania
    European Court of Human Rights · International court · Tătar family → Romania

    The court found unanimously that Romania violated Article 8 by failing to assess the risks in advance, not stopping the activity after the accident and not informing the public; it awarded €6,266 in costs and no damages, finding no proven causal link to the son's asthma. European Court of Human Rights

Insurers

  1. 2000No policy found
    None identified → Aurul SA / Transgold SA

    No insurance policy, insurer or payout is mentioned in any source opened; the plant was sold by the liquidator for $7.3m in 2006.

What nature saw

Outcomes measured on the ground, and nature's note.

Nature's report opens this page. Below: further outcomes measured on the ground.

Compensation paid to Hungary
0
Claim of about $100m; defendant struck off in 2008
Fish killed in Hungary
1,240 t
Hungarian estimate; one source gives about 200 t
Aquatic life recovered
95% in 3–4 years
Szamos and Tisza (Index.hu)

What we don't know

Undisclosed, unproven, untried: recorded as data.
Court ruling existsKey earnings undisclosed

Money

Court

  • Unclear Romanian criminal case resumed: outcome not on record.

Insurers

  • Unclear None identified: no decision on record.

Record

  • None on record Actual gold and silver output, 1999–2005: not found; revenue figures are design-capacity estimates.
  • Unclear Whether Romania paid Hungary anything: Economedia says the Romanian state paid; Index.hu and Hungary's former president say nothing was received. Economedia's report of a USD 150 fine for late reporting is unverified.
  • Unclear Outcome of the Romanian criminal case after it was resumed in 2003: unknown.
  • None on record Court-ordered production limit: sources give a limit to 15% of capacity or a cut of 85%.
  • None on record Fish kill: 1,240 t (Hungarian estimate) versus about 200 t (BBC via Wikipedia).
  • None on record Cyanide mass: 50–100 t (UNEP/OCHA) versus 100 t or 120 t in other sources.
  • Insufficient The often-cited 2.5 million affected Hungarians and the company chairman's "grossly exaggerated" remark come from BBC via Wikipedia and were not verified.
  • None on record Who first called it the worst disaster since Chernobyl: no named speaker found.
  • Insufficient A 2006 report that Hungary's USD 140m claim against the Romanian state was unresolved, and a single mention of a $179m claim against Esmeralda, were not verified.
  • None on record No insurance policy, insurer or payout appears in any source opened.
  • None on record Baia Borșa volume: more than 100,000 t (ICPDR) versus about 20,000–22,000 t elsewhere.

Did the harm stop?

The plant stopped for 4.5 months and restarted on 13 June 2000; it ran to about 2005 under court-imposed limits.

Who paid?

Communities and fisheries along the Someș, Tisza and Danube in Romania, Hungary and Serbia. Hungary received nothing on its claim; the human-rights court found the Romanian state at fault and awarded no damages.

Sources

Voices on record: ✓ Company or project✓ Government and regulators✓ Courts✓ Press and investigations✓ Communities and civil society✓ Researchers

Company or project

Government and regulators

Courts

  1. Case of Tătar v. Romania (no. 67021/01)
    European Court of Human Rights · 2009-01-27

Press and investigations

  2. Epic poisoning of Europe's rivers
    Christian Science Monitor · 2000-02-16
  5. Aurul / Romaltyn history
    Economedia.ro · 2025-04-16
  7. Hungary claims $100 mln over cyanide river spill (Reuters)
    Business & Human Rights Resource Centre · 2001-12

Communities and civil society

  1. Technical Note 03/00 on the Baia Mare spill
    Greenpeace Research Laboratories · 2000-03-20

Researchers

  1. Lex cathedra et praxis 04 (Csapó Orsolya)
    Pázmány Péter Catholic University · —

Connected cases

Related matters, and cases linked to this one through the same organisations, with the role each played in both.
Terms used on this page

Science and environment

Cyanide (in gold mining)
A highly toxic chemical used to dissolve gold from ore.
Tailings and tailings dam
Tailings are the waste left after ore is processed; a tailings dam is the embankment that stores them as wet sludge.

Bonds and banking

Liquidation, insolvency, bankruptcy
Legal processes that apply when a company cannot pay its debts; its assets are sold and claims against it may go unpaid.

Law and courts

European Court of Human Rights (ECHR)
The Council of Europe's court in Strasbourg, which rules on complaints that a state has violated the European Convention on Human Rights.
Force majeure
An extraordinary event outside anyone's control, such as extreme weather, that can excuse liability.
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