I received some lead test results today for 13 community
gardens in the neighborhood where I live and work. For each garden, I sent
in samples of compost, soil from a garden bed, soil from a path or common area,
and some dry fall leaves.
In Minnesota, 100 ppm lead is considered contaminated and
400 ppm is considered hazardous. None of the results were in the hazardous
What is curious to me, though, is that more than half of
the compost results came back at approximately 100 ppm lead, the threshold for
soil contamination. I'm wondering how the lead is getting into the
Anyone familiar with lead in compost?
Program Director, GreenSpace
The Green Institute
2801 21st Avenue South, Suite
Minneapolis, MN 55407