Diesel pollution detected in Lake Constance near Rorschach

A small amount of diesel fuel was discovered in Lake Constance near Rorschach, Switzerland, on the afternoon of Monday, October 26, 2026. The pollution was first reported to the St. Gallen emergency dispatch center at approximately 3:15 p.m. near the main road close to the harbor.

Local fire departments responded by deploying an oil boom to contain and isolate the spill. The St. Gallen Cantonal Police have launched an investigation to determine the exact cause of the contamination and to identify those responsible.