Where is high amounts of lead likely found due to long-term pesticide use?

High amounts of lead are likely found in the soils of many orchards primarily due to the historical application of lead-based pesticides. These pesticides were commonly used in agriculture throughout the 20th century to control pests and enhance crop yields. Over time, the residues from these lead-containing products accumulated in the soil, leading to higher concentrations of lead in these areas.

In contrast, while residential homes, playgrounds, and school yards may have lead contamination due to other sources, such as deteriorating lead-based paint or lead pipes, the specific context of this question focuses on agricultural practices associated with pesticide use. Orchard soils stand out because they systematically received lead through pesticide applications, leading to a distinct environmental concern that persists in these areas today. This historical context is crucial in understanding why orchard soils are a significant concern in discussions about lead exposure and environmental health.