This study was carried out to investigate the characteristics of acid deposition by stemflow, throughfall, rainfall and SO2 in the industrial, urban and rural areas where were affected by the acid rain due to air pollution in Pinus thunbergii than Quercus spp. forest. As the stemflow pH in industrial and urban area were lowed that of rural area, the result industrial and urban, and correlation of negative (r = -0.9415**) between pH and EC. The concentration of acid ion by stemflow, throughfall, rainfall were high SO42- ion at industrial areas, especially of NO3-ion at urban areas. The concentration of basic ion all rain fall were high Ca2, Na+ ion at industrial areas, but there were high Ca2, Na+ion at urban areas. The concentration of SO2 at survey areas were high SO2 concentration at industrial and urban areas, but there was low at rural areas. There was correlation of negative (r = -0.8007**) between pH and SO2 concentration at survey areas. Soil acidity was also affected by stemflow and showed significantly low soil pH in industrial and urban areas.
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