Characteristics of pollutants from urban surface runoff were investigated.

Water quality measurements of surface runoff were carried out on five rainfall events during the period of August to November, 2005.

Characteristics of surface runoff from a 0.14-km2 urban catchment with separated sewer in Macau was investigated.

Pollutants such as TSS, TN, COD discharged from surface runoff depend greatly on the dry periods and storms intensity in such two urban catchments.

The suspended soil material carried by drainflow contained as much PPi (47-79 mg kg-1) as did the surface runoff sediment (45-82 mg kg-1).