Nuisance particulate is a term used historically by the ACGIH (American Conference of Governmental Industrial Hygienists) to describe airborne materials (solids and liquids) which have little harmful effect on the lungs and do not produce significant disease or harmful effects when exposures are kept under reasonable control. Nuisance particulates may also be called nuisance dusts. High levels of nuisance particulates in the air may reduce visibility and can get into the eyes, ears and nose. Removal of this material by washing or rubbing may cause irritation. (Also see Particulates Not Otherwise Classified)