Dust particles present in smelter emissions contain lead (Pb). Dust particles in the air that contain Pb is referred to as ‘lead in airborne dust’. This lead in airborne dust may travel from the smelter site and settle in the community as part of the dust and soil. In Trail, lead in airborne dust originating at the smelter site can come from fugitive dust emissions (e.g. stockpiles, open handling of materials, buildings and vehicle traffic) and stack emissions. Bare soils, deteriorating older paint, and other industries in the community can also add to Pb in airborne dust.