So… I’d agree that sounds gross if true, not sure if it’s dangerous though. But what about the US agricultural practice of fertilizing crops like lettuce with sewage solids?
The Office for Science and Society at McGill University in Quebec, which attempts to popularise and explain scientific issues, says there is "no evidence" that sewage is used as a fertiliser for growing garlic in China.
Sure, they're supposed to sanitize and process the material in various ways before using them on crops. It's still questionable in one major way, which is the presence of pharmaceutical residue.