Determination of pesticidal recidues was made in this approach. To determine the persistence of pesticides with various activities present in environmental samples electro chemical techniques such as adsorptive stripping voltammetry, cyclic volatametry was applied. Carbon nano tubes paste electrode was used as working electrode. Average amounts for ten replicates founded by using standard addition method. Statistical concepts such as standard deviation and correlation coefficient successfully applied for calculations. In all the findings in this approach all the possible errors are minimised and accuracy is maximised. Water samples of a variety of areas collected and investigated for pesticide residues before and after the application of pesticides.