Fugitive dust emissions from open sources are difficult to quantify owing to the extended area covered by such sources and the range of activities that contribute to such emissions. In a novel approach, a network of continuous monitors was used to obtain real-time local PM10 data on an integrated works and these data were used in conjunction with a reverse-dispersion modelling technique to quantify stockyard PM10 emissions. The results obtained are discussed and other potential applications of this approach are outlined.