Pesticides like $DDT$ which are sprayed to kill pests on crops are found to be present in the soil,groundwater,water bodies etc. Explain how do they reach these places.

(N/A) Soil: Pesticides are used to protect crops from pests. When sprayed on plants,they eventually settle into the soil particles.
Groundwater: Through the process of irrigation and rainwater runoff,these pesticides present in the soil leach into the lower layers of the earth and contaminate the groundwater.
Water bodies: Pesticides reach water bodies like rivers,canals,and ponds through surface runoff from agricultural fields,or when contaminated agricultural waste and wastewater are discharged into these water sources.