30 Years After the Schweizerhalle Chemical Accident (Sandoz Accident)

Switzerland had a rude awakening on the morning of 1 November 1986. A fire in Schweizerhalle caused an ecological disaster in Basel which resulted in serious damage to life along the upstream stretch of the Rhine for many years. One consequence of the disaster was the enactment of Switzerland’s Ordinance on the Prevention of Major Accidents, which provides for greater safety.

At a glance

Geodata models

Geodata models for the FOEN’s official geodata on the topic of Major Accidents.

Space planning

Unconcerned construction activities and changes in the space plan can have a significant effect on the density of people presence and lead to an increase of risks.


Indicators assessing and illustrating the status and trends of the environment in the issue area of prevention of major accidents.

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