Pesticides used in the fields of agriculture and public health to eliminate pests and insects , [29 ] and in general the use of pesticides leads to disruption of the ecological balance through the various elements of the environment pollution of soil , water , plants and animals are difficult to re – balance. The sites include prone to contamination with pesticides , through groundwater [30] , wells , springs, rivers, lakes, reservoirs and ponds. [31] and contaminated drinking water with pesticides more than one way , including the shift cross from neighboring areas during the spraying process , or as a result of leakage from land deal with pesticides in conjunction with the movement of the water, or going on pollution direct use of pesticides in the eradication of water hyacinth , for example , which is spread on a page Nile River in Egypt , and thus represents pesticide residues serious problem both for human health; terms of its impact on the respiratory system , skin and eye , 32] or as lethal to fish and harmful to crops or ; private cotton plant when Rhee water was dealt with those in the case of pesticides on the Elimination of hyacinth , for example . It is also harmful to animals producing milk when drinking contaminated water . [33]]