Site conditions associated with groundwater contamination?

• A. Soil texture
• B. Soil color
• C. Plant height
• D. Air temperature

Answer: (A)

Soil texture is the key factor because it determines how water and dissolved chemicals move through the soil. The mix of sand, silt, and clay sets pore sizes and connectivity, which controls infiltration and percolation rates. Coarser soils drain quickly, offering less contact with soil minerals, so pesticides can travel downward toward groundwater more readily. Finer-textured soils have smaller pores and greater adsorption, which can slow or reduce downward movement. Among the options, soil texture directly influences the potential for pesticides to reach groundwater, whereas soil color, plant height, and air temperature don’t directly govern that downward transport.