Nothing gold can stay…except in Switzerland.

Around $1.8 million worth of gold was discovered in Switzerland’s wastewater system, according to a new study reported by Bloomberg.

Scientists at the Swiss Federal Institute of Aquatic Science and Technology looked at 64 water treatment plants and found that approximately 94 pounds of gold get flushed through the sewage system each year.

“At certain sites in Ticino, concentrations of gold in sewage sludge are sufficiently high for recovery to be potentially worthwhile,” the study’s authors wrote in a press release. “This can be attributed to the presence of several gold refineries in the region.”

Around 70 percent of the world’s gold passes through Switzerland’s refineries each year. Researchers also found 6,613 pounds of silver, which equals about $1.7 million, in the sewage systems along with concentrations of tantalum and germanium. The researchers note that, in most cases, trying to recover these metals from the sludge wouldn’t be worthwhile.

The study says it’s the first of its kind to observe a wastewater system for trace elements in an industrialized country.