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This study investigated the runoff from rice paddy located on reclaimed fine sandy loam soil upslope from estuaries to provide data for the development of policies to protect water quality of estuaries. Reclaimed soil nutrient adsorptivity and pollutant runoff loads were monitored from 2006 to 2008. The phosphate adsoptivity of the study soil appeared to be half of those of typical paddy soils because of relatively low clay and high sand content of the reclaimed soil. Phosphate concentration of the paddy water ranged from 1 to 4 mg L-1, which are much higher than typical paddy water which varys 0.5 to 1mg L-1. The observed total nitrogen(TN) runoff loads from the paddy varied between 10 to 24 kg ha-1, which was consistent with the unit pollutant load provided by the Korean Environment Ministry. However, the total phosphorus(TP) load was about 1.5 to 3 times greater than the Ministry endorsed unit load. Thus, nutrient runoff, particularly phosphate from the reclaimed paddy field needs to be managed more thoroughly to protect estuarine water quality.