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An improved gas chromatography–mass spectrometry (GC–MS) method for simple, rapid and precise quantification of phthalates in drinking water is presented. This method was validated for bis (2-n-butoxyethyl) phthalate (DBEP), bis (2-n-ethylhexyl) phthalate (DEHP), butyl benzyl phthalate (BBP), di-butyl phthalate (DBP), diethyl phthalate (DEP), dihexyl phthalate (DHP), dimethyl phthalate (DMP), di-n-octyl phthalate (DNOP) and dinonyl phthalate (DINP). Linearity of 0.9984 > r² > 0.9975 in the range of 0.075–4.8 μg/mL for the selected phthalates was obtained. Accuracy values were in the range of 93–114% and RSD% for the analysis of 1.2 μg/mL of each phthalate was below 2.3% (n = 9). This new method design has significantly improved the detection in terms of rapidity, specificity, repeatability and accuracy compared to available methods. The procedure has been applied to the analyses of three different …