Frequently Asked Questions

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Is it safe to plant berries in contaminated soil?

Our studies have found that fruiting crops have the lowest metals and are typically below recommended levels.

Dust landing on fruit crops is a potential source of metals and washing fruit before eating is likely more important than the soil they grow in. We do not see a strong link between soil lead and lead in produce, particularly with fruiting crops.

In our most recent study in 2019, fruit and leaf crops had significantly lower metals levels than in previous years. The decrease appears to be related to improved air quality since the metals levels in soil were consistent between years.

Get your soil tested. THEP will replace garden soil that exceeds 400 parts per million lead.

  • Always wash fruits and vegetables before eating them.
  • Peel root vegetables before eating.
  • Choose what you grow and eat.
    • The fruit parts of plants (e.g., tomatoes, cucumbers, berries, beans) have shown they absorb the lowest amount of metals.
    • Leafy greens have the highest level of metals. Washing them gets rid of some, but not all of it.
  • Consider amending your soil to help reduce metal uptake. This may include keeping your pH close to neutral, adding organic matter and considering phosphate fertilizer. 
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