The use of pesticides has become an integral part of modern agriculture and horticulture for the efficient production of quality food and fiber.
Evidences show that pesticide residues has potential to contaminate groundwater.
The potential of pesticides to contaminate groundwater depends on a number of soil and pesticide properties that affect the mobility and persistence of pesticide in the soil environment. In Yolo County, groundwater resources help utilize for agriculture, urban, industrial and business needs. The objective of our study is to identify vulnerable groundwater zones to pesticides use in Yolo County, California. The study site selected for our model is Yolo County, California. It is underlain mostly by soil with high clay content.