Sandoz Schweizerhalle fire and Rhine recovery
- In 2008 a salmon was caught at Basel for the first time since 1958. In 2024 only 72 were counted in North Rhine-Westphalia, and the population depends on fish released from hatcheries. dpa (via Yahoo)
- About 400 km of my rivers were polluted.Length of river affected by fish deaths.
- Press and investigations Swissinfo (2008): Reported the first salmon caught in Basel since 1958, with more than 5,000 salmon returned and up to 20,000 juveniles released in Switzerland each year. Swissinfo
- International bodies ICPR: Declared the Rhine a living river again in 2006.
- Press and investigations dpa (reported by Yahoo, January 2025): Salmon returns fell after the 2018–2019 droughts; 72 salmon were counted in North Rhine-Westphalia in 2024; the population depends on hatchery juveniles. dpa (via Yahoo)
In November 1986 a fire at a Sandoz warehouse near Basel sent pesticides and a mercury compound into the Rhine and killed fish along about 400 kilometres. The river was later declared a living river again, but its salmon population depends on stocking.
Of agricultural chemicals, 1 November 1986; about 30 tonnes of pesticide and 200 kg of a mercury compound reached the Rhine.
Status As of December 2025: salmon returns depend on hatchery stocking; the ICPR reported 8 of 21 monitored micropollutants down and 4 up.
- Fish of the Rhine, including about 150,000 eels — Died in the days after the fire
What happened
On 1 November 1986 about 1,351 tonnes of agricultural chemicals burned at a Sandoz warehouse near Basel. Firefighting water carried pesticides and a mercury compound into the Rhine. About 30 tonnes of pesticide and 200 kg of a mercury compound were recorded as entering the river, and about 150,000 eels died along roughly 400 kilometres.
Sandoz paid CHF 43 million to the Rhine states and set up a CHF 10 million research fund. Two firefighters were charged; the sources reviewed record no charges against company management.
In 2006 the International Commission for the Protection of the Rhine (ICPR) declared the river, once called Europe's sewer, a living river again. In 2008 the first salmon since 1958 was caught in Basel; more than 5,000 salmon had returned to the Rhine basin, and up to 20,000 juvenile salmon were released in Switzerland each year.
Since 2000 an average of about 200 salmon a year have returned. After the droughts of 2018 and 2019 the numbers fell, and 72 salmon were counted in North Rhine-Westphalia in 2024. The population depends on juveniles from hatcheries, and the target of a wild population by 2020 was not reached.
On micropollutants, an ICPR interim report of December 2025 covering 2016–2023 found that of 21 substances monitored at wastewater plants, 8 had decreased and 4, including an antibiotic and the chemical PFOA, had increased. The 2040 target is a 30% reduction.
- 1986Fire at Sandoz warehouse near Basel; about 1,351 tonnes burned; pesticides and mercury compound reach the Rhine (1 November)
- 2006ICPR declares the Rhine a living river again
- 2008First salmon caught in Basel since 1958
- 202472 salmon counted in North Rhine-Westphalia
- 2025ICPR interim report on micropollutants: 8 of 21 substances down, 4 up (December)
What was said
Where accounts differ
Each party's account, side by side, with its source. The record does not settle these points; it shows them.
Reported the first salmon caught in Basel since 1958, with more than 5,000 salmon returned and up to 20,000 juveniles released in Switzerland each year.
SwissinfoDeclared the Rhine a living river again in 2006.
Salmon returns fell after the 2018–2019 droughts; 72 salmon were counted in North Rhine-Westphalia in 2024; the population depends on hatchery juveniles.
dpa (via Yahoo)Paid CHF 43 million to the Rhine states and set up a CHF 10 million research fund; no other statement appears in the sources reviewed.
Two firefighters were charged; no charges against company management appear in the sources reviewed.
How it looked
Shown
- The Rhine, once called Europe's sewer, declared a living river againInternational Commission for the Protection of the Rhine (2006)
- Salmon returning to the Rhine basin; the first caught in Basel since 1958Swissinfo report (October 2008) · Swissinfo
Recorded
- About 1,351 tonnes of agricultural chemicals burned; about 30 tonnes of pesticide and 200 kg of a mercury compound entered the Rhine; about 150,000 eels died along about 400 km.
- Sandoz paid CHF 43 million to the Rhine states and set up a CHF 10 million research fund; two firefighters were charged and company management was not held to account.
- About 200 salmon a year returned on average since 2000; 72 counted in North Rhine-Westphalia in 2024; the population depends on hatchery juveniles.
- ICPR interim report (December 2025): 8 of 21 monitored substances decreased and 4 increased, including an antibiotic and PFOA.
Who gained
Reached nature or the ground
Gained elsewhere
Responses on record
- icpr (2025-12): Declared the Rhine a living river again in 2006; in December 2025 reported 8 of 21 monitored micropollutants decreased and 4 increased, with a 2040 target of a 30% reduction.
- sandoz (1986): Paid CHF 43 million to the Rhine states and set up a CHF 10 million research fund. No further public statement appears in the sources reviewed.
In court and with insurers
Lawsuits and rulings
- Outcome not on recordCriminal charges after the Sandoz fireNot stated in the sources reviewed · Criminal · Not stated → Two firefighters
The sources reviewed record that two firefighters were charged and that company management was not held to account. The court, the charges and the outcome are not stated.
Insurers
What nature saw
Nature's report opens this page. Below: further outcomes measured on the ground.
What we don't know
Nature
- Disputed Has the Rhine recovered?
Court
- Unclear Criminal charges after the Sandoz fire: outcome not on record.
Accounts
- Disputed Who was held to account for the fire?
- None on record Sandoz: Paid CHF 43 million to the Rhine states and set up a CHF 10 million research fund; no other statement appears in the sources reviewed.
Record
- None on record The ratio of Sandoz's compensation to the company's profit is not on record.
- None on record The total public cost of treatment works built on the Rhine is not on record.
- Insufficient Reported but not independently verified: that the Rhine states then adopted a binding action programme, invested in treatment and set up joint measurement stations.
- None on record Where and under what charges the two firefighters were prosecuted, and the outcome, are not stated in the sources reviewed.
- None on record The main text of the Zoological Society of London's 2026 river report could not be opened, so its findings on Rhine recovery are not recorded here.
Did the harm stop?
The fire and the discharge happened in a single event on 1 November 1986. Salmon returns have since recovered in part but, as of 2024, depend on stocking.
Who paid?
Sandoz paid CHF 43 million to the Rhine states and set up a CHF 10 million research fund. Two firefighters were charged. The cost of wastewater treatment on the Rhine was met by taxpayers and water-bill payers, according to the sources reviewed.
Sources
Press and investigations
- Hope jumps at salmon's return to SwitzerlandSwissinfo · 2008-10-15
- Salmon counts in North Rhine-Westphalia (dpa, via Yahoo)dpa (via Yahoo) · 2025-01-06