Posted: 28/01/2014 at 18:27
philippa; in my area we all have septic tanks; we get them emptied once a year or so. Apparently the company that empties them then puts the waste on the fields. I have been told that this is permitted; not certain if that is true. We also sometimes have huge piles of grey 'dust' at the edges of the fields; this apparently is processed sewerage from London.
As long as the veg are well washed, I don't see that there would be a problem. Though personally I think my neighbours might object.