[OutOfHere]

Biosolids should be completely banned for agricultural use. They will never be safe to use. It is literally just dried sewage. Use it once and the land is contaminated for ten thousand years.

There is a right way to do it though, which is to compost what's compostable, grow good soil using it, then test it thoroughly for PFAS, heavy metals, pharmaceuticals, etc., and only then consider using it if all tests pass. Each batch has to be tested.