A popular Geneva lakeside beach at Creux-de-Genthod remains closed five months after swimmers reported seeing toilet paper and waste floating in the water.
Tests revealed levels of faecal bacteria above the WHO guidelines.
Investigators later traced the pollution to a toilet on a construction site which was illegally flushing directly into the storm water system, discharging directly into the lake.
Officials say there was no lasting environmental impact, but the beach will stay shut until new water samples confirm it is safe to reopen.
Two women die in avalanche in Haute-Savoie
Train use higher
Another horse euthanized in St Moritz
Retired couple fined for benefit fraud
Wolf swims across Lake Lucerne
Swiss firms prepare legal action against the US
