Studies of submicron dust using Mie scattering from Nd:YAG lasers and video data of micron to sub‐millimeter sized dust on DIII‐D tokamak have provided the first data of dust sources and transport during tokamak discharges. During normal operation on DIII‐D dust observation rates are low, a few events per discharge or less. The net carbon content of the dust corresponds to a carbon atom density a few orders of magnitude below the core impurity density. Statistical analysis of Mie data collected over months of operation reveal correlation of increased dust rate with increased heating power and impulsive wall loading due to edge localized modes (ELMs) and disruptions. Generation of significant amounts of dust by disruptions is confirmed by the camera data. However, dust production by disruptions alone is insufficient to account for estimated in‐vessel dust inventory in DIII‐D. After an extended entry vent, thousands of dust particles are observed by cameras in the first 2–3 plasma discharges. Individual par...