The fine particulate matter (PM10), which pollutes the atmosphere, is derived form a range of sources, including the steel industry, other industrial processes, road traffic, and domestic fuel use. It is necessary to identify which sources are the most important, so that control measures can be targeted effectively. The aim of this project is to test a range of analytical methods and mathematical techniques, which can identify the PM10 originating form the steel industry. The work will identify which of the methods are the most cost- effective.