[en] A simplified method for simultaneous multi-element analysis of trace-elements in water samples by X-ray fluorescence (XRF) spectrometry is described. Trace elements such as Fe, Ni, Cu, Co, Se, Hg, Pb and Mn in water samples can be analyzed by this method. Metal ions in water sample are co-precipitated with Ammonium-pyrrolidine-dithio-carbamate (APDC) after adjusting the pH in the solution. Co-precipitate is then deposited at the surface of membrane filters as a thin layer. Thickness of the deposit on the filter is maintained to minimize the X-ray absorption effect. The thin deposits on filters are measured by XRFspectrometry by employing the Mo secondary target mode with tube current of 40 mA and voltage of 55 kV. X-ray spectra were collected on multi-channel analyzer and then analyzed by the AXIL (Analysis of X-ray spectra by Iterative Least squares) software package to determine the corresponding concentrations. The validity of the method was checked by analyzing twice distilled water samples spiked with known amounts of Zn, Hg and Pb. The lower limits of the detection (LLd) obtained by this method are in the order of few parts perbillion. (ppb). The method described in this paper can conveniently be used in routine analysis of water samples such as tap water and mineral water with properly calibrated X-ray spectrometer. The method is relatively rapid and less expensive compared to conventional analytical methods for trace elements