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Water chlorination for disinfection purposes leads to the formation of haloacetic acids (HAAs). In this study, headspace solid-phase microextraction (HS-SPME) was studied as a possible alternative to liquid-liquid extraction for the analysis of HAAs in drinking water. The method involves direct derivatization of the acids to their methyl esters without methyl tert-butyl ether (MTBE) extraction. Experimental parameters such as 2㎝-50/30㎛ divinylbenzene/carboxen/polydimethylsiloxane fiber, sulphuric acid of 1㎖, methanol of 3㎖, derivatization temperature of 50℃, derivatization time of 2hrs, sodium chloride salt of 10g , extraction time of 30minutes, extraction temperature of 20oC and desorption time of 1minute at 260oC were selected in optimal experimental conditions for the analysis of haloacetic acids. The linearities (r2) for DCAA and TCAA is 0.9981 and 0.9997 when analyte concentration ranges from 1 to 40㎍/ℓ, respectively. The relative standard deviations (%RSD) for DCAA and TCAA were 3.5 and 2.1% for concentration of 10㎍/ℓ (n=5), respectively. The limits of detection (LOD) were 0.05 and 0.1㎍/ℓ. The results of HAA2 from the survey of Seongnam drinking water samples showed that the highest concentration of HAA2 (DCAA + TCAA) were 30.04㎍/ℓ which was well within the Korean drinking water quality standard of 100㎍/ℓ. It can be concluded that HS-SPME technique with direct derivatization has a great potential for the analysis of drinking water.