[en] Rainwater is still commonly consumed in daily life in many areas in Thailand. The quality of the rainwater at each area is different depending on its circumstance. Since rain leaches air particulate matter and mixes it in rainwater, then rainwater is contaminated of some elements and compounds in soluble fraction and insoluble fraction. In this study, rainwater was collected at the Office of Atoms for Peace during April to July 2002 with wet and dry precipitation collector. Some elements were analyzed by NAA in both fractions. It was found that Ca, Mn, Mg, V, Sb, Br, K, Na, As and Zn were in soluble fraction more than in insoluble fraction. The high enrichment factor which identify the element of anthropogenic pollutant load, of these elements were Ca, Sb, Br, K, As and Zn. For the insoluble fraction, Al, Ti, Sc and Fe were found higher than soluble fraction. The enrichment factor of them were low