Sewage sludge spread on Swiss farmland now linked to PFAS contamination
Short record: the main facts, with sources. A full case file has not been prepared.
Sewage sludge spread on farms in St. Gallen and Appenzell Ausserrhoden in the 1970s to 1990s, on cantonal advisers' advice, is resurfacing as PFAS contamination, Keystone-SDA reported. What is at stake is the soil and who is to blame; the sources reviewed do not say how it will be cleaned up.
- Farmers in St. Gallen and Appenzell Ausserrhoden — Their farmers' association says they are victims of the contamination, not its cause Keystone-SDA / swissinfo
What happened
Keystone-SDA reported on 16 July 2026 that sludge spread on farmland in St. Gallen and Appenzell Ausserrhoden in the 1970s to 1990s, on the advice of cantonal advisers, is now resurfacing as PFAS contamination.
The farmers' association says its members are victims rather than the cause; a 1992 cantonal document shows that sludge use was actively encouraged, the report said.
In court and with insurers
Lawsuits and rulings
Insurers
What we don't know
Nature
- Not measured Harm to nature: The record holds no measurement of harm to nature.
Record
- Insufficient Reported but not verified: Switzerland banned spreading sewage sludge on fields in 2006 under the precautionary principle.
- None on record The sources reviewed do not give PFAS concentrations or the area affected.
- None on record The sources reviewed do not say how the contamination will be cleaned up or who will pay.
Did the harm stop?
Not stated in the sources reviewed.
Who paid?
Not stated in the sources reviewed.
Sources
Press and investigations
- St. Gallen PFAS and sludge legacyKeystone-SDA / swissinfo · 2026-07-16