Abstarct: Given that urban runoff include a considerable amount of water, could serve as an alternative source of water supply for various uses should be considered. Also, urban runoff is one of the important pollutants of receptive water bodies. The basic objective of this investigation was to evaluate the quality of urban runoff and also, them are the heavy mextal pollution. Therefore, th November 2012 nine urban runoff samples were colleted. Electrical conductivity and pH values of the samples were measured insitu and the concentration of main cations and heavy mextal were measured in the laboratory. The obtained results indicate that the electrical conductivity of all samples is basically low, so that the values ranges from 95 to 168 µs/cm. It is related to the absence of dissolved salts in urban environments and relatively small length of water paths. It is also observed the values of pH as neutral to slightly acidic. The results show that the main cations in the samples were relatively small, so that the maximum concentrations these ions is about 86.11 micrograms per liter. In this study, the most important heavy mextals which measured using ICP-MS method are lead, nickel, zinc, arsenic, iron, cadmium, cobalt, molybdenum, copper, aluminum, manganese and mercury. By evaluating the values of these elements in urban runoff, industrial and residential areas, it may be argued that the concentration of most elements in industrial areas is higher than that in residential areas. More over, comparing these elements with the standard of discharging to surface water, it is evident that surface urban runoff in the city anymore than the elements nickel, zinc, arsenic, copper, manganese and mercury are pollutants. Finally, it was observed that the quality of urban runoff in Shahroud city to discharge to surface water is suitable.