Abstract:
Dust contamination is a risk factor for the population of the town of Ruse. It is very
strongly expressed during the heating period. The paper presents the results from long-lasting
investigations of dust content in the free air by residential districts, at different weather conditions and
other factors. Results are compared with sociologic research among the townspeople. An attempt is
made to assess the influence of Thermo-electric Power Plant and other industrial sources. Criticality
is assessed according to the differential risk for dangerous action. It is compared with data about sick
rate among population.