Air pollutant emissions occurring in an uncontrolled way do not be subject to the regular verification just like it takes place in case of the controlled sources, for which the routine measurements are carried out. In the paper a methodology and the results of some research were presented. The research consisted in determination the quantity of dust and gaseous pollutants emitted from the halls in which technological processes connected with the steel continuous casting were being run. Stocktaking of all the uncontrolled emission sources were carried out and the technological operations predominating in the level of the particle matter and selected heavy metal emissions were determined. The emission factors (with reference to the production scale) for such substances as total dust, heavy metals (Pb, Cu, Zn, Cr, Cd, Ni), sulfur dioxide, nitrogen dioxide and carbon monoxide were also estimated. Not large participation of the uncontrolled air pollutant emission from the processes in the total emission from the ironworks has been confirmed.

English title: Uncontrolled air pollutant emissions from the halls of continuous casting of steel.