Indoor air quality in primary schools.

The objective of this paper was to verify that problem of indoor air pollution is present in primary school in Yugoslavia. Indoor air pollutant levels of sulfur-dioxide, soot, nitrogen dioxide, carbon monoxide and formaldehyde, and air-microflora was determined in different places of school environment. The average indoor level of sulphur dioxide and soot in primary schools were comparatively high. Determined average levels of carbon monoxide were from 13 .2 - 31. 8 mg/m3, levels of nitrogen dioxide were 20 - 62 μg/m3 and levels of formaldehyde: 0.01 - 0.83 μg/m3. Most frequently identified pathogenic microorganisms were E. coli, Staphilococcus aureus, Streptococcus haemoliticus and fungi and molds. In both schools more than 50% of the samples contained innumerable bacteria in m3 of the air. Indoor air pollution in Yugoslav primary schools can be hazardous to pupils' health in regard to microbiological and chemical agents. It is necessary to establish Yugoslav standards of indoor air quality.