Pesticides are used nowadays for the control of insects and vector diseases. Chlorinated pesticides are chemically stable and not easily decompoused in nature. They are lipophylic, so if they enter the ecosystem through the food chain, they will accumulate in fat tissues and liver. Chronic poisoning of the chlorinated pesticides could lead to diminished liver function, necrosis of liver and adrenals or could even be teratogenic or carcinogenic. The object of this study is to compare the concentration of pesticide residues found in cow's milk with the Acceptable Daily Intake established by WHO and compare the Maximum Residues Level established by WHO, USA and West Germany. Sample were taken from farms selected at random from Malang area in East Java. Identification and quantitation were carried out by Gas Chromatography with an Electron Capture Detector, SE 30 — OV 210 coulomn and Nitrogen carrier gas. In this study it was apparent that the pesticide residues found in the cow's milk samples were Dieldrin, Lindane and DDT. The concentration of pesticide residues were higher than the Acceptable Daily Intake established by WHO. However, the milk samples were still safe for consumption because the calculated Maximum Residue Level for the general population is higher than the Maximum Residue Level established by WHO, USA and West Germany. In order to prevent long term effect of pesticide residues, control on the use of pesticides should be intensified, especially on DDT, so pesticides residues in the environment and agricultural product will decrease.