PMEP Home Page --> Pesticide Fact Sheets and Tutorials --> Protecting Groundwater: A Guide for the Pesticide User --> Depth to Groundwater

Depth to Groundwater

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Conditions of the site also influence leaching of pesticides. The most important condition is depth to groundwater. Less filtering by the soil occurs for a shallow aquifer. Therefore, there is less opportunity for degradation or adsorption. In humid regions where groundwater may be a few feet below the surface of the soil, where rainfall is high, and where soils are permeable, water carrying dissolved pesticides may take only a few days to percolate to groundwater.

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