Precious metals, primarily gold, worth 13-million pounds ($26.3 million) is being flushed away through sewers every year, it has been claimed.
Analysis by Thames Water found that the level of gold in sewerage systems was comparable to that found in working mines.
Hazel Prichard, a Cardiff University geologist, has been studying precious metals in waste alongside Thames Water, conducting tests in the incinerators that burn off sewage sludge.
“We were stunned,” she told The Times. “They were all consistently high in gold.”