However, besides for gold, the report shows, the Swiss sewage becomes more and more crowded as the years go by, because annually almost 3.000 kilograms of silver are being thrown away.
According to Bloomberg, Swiss scientists estimate Switzerland's bustling gold refineries disperse about $1.8 million worth of gold into the country's sewer system every year. This does not appear to be an issue in Switzerland: in the vast majority of cases, concentrations were of no ecotoxicological concern and lay below specified limits. This can be attributed to the presence of several gold refineries in the region.
Gold and silver aren't the only valuable items found in Swiss waste water this year.
The study, commissioned by the Swiss Federal Office for the Environment, involved surveys of 64 waste water treatment plants across the country.
The discovery of sewer gold in Switzerland has social media talking.
"The recovery of metals from wastewater or sludge is scarcely worthwhile at present, either financially or in terms of the amounts which could be extracted", the study said.
Other rare earth metals, like gadolinium and heavy meal niobium, were also found in the Swiss wastewater, the report details.
In addition to gold, it also found 3,000kg of silver lost in the sludge each year - worth around $1.7 million - and concentrations of trace elements like tantalum and germanium often used in the technology and medical sectors.
In September, Swiss investigators launched a probe into why two Spanish women flushed roughly €100,000 ($120,000) down toilets in Geneva.