Source apportionment and spatial-temporal variations in the metal content of surface dust collected from an industrial area adjoining Delhi, India

► Faridabad industrial area adjoining Delhi have high surface dust pollution load for Cd, V, Co, Ba, Ti, Ni, Cu, Cr and Zn. ► Sampling sites are least to highly polluted but specific to metal(s) and sampling season. ► Major metal pollution sources are mixed type industries, crustal, vehicular emissions, oil and battery burnings. ► Compared to large, small and medium scale unorganized industries add more pollution. ► Nature of industries, changes in land use pattern and shifting of small scale industries cause spatio-temporal variations.