Pollution of soil is a phenomenon of alteration of natural chemical composition of soil caused by human activity. Among the main causes include: non-biodegradable waste, waste water, plant protection products, fertilizers, hydrocarbons, dioxins, heavy metals, organic solvents. This type of pollution leads the impairment of equilibrium physical-chemical and biological soil, so prepare to erosion and landslides may involve the entry of harmful substances in the food chain to humans. The substances that reach the groundwater ground water also can damage their delicate balance. Interference with them may occur, and consequently cause dangerous changes in drinking water, and then those used in man.