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The purpose of this study is to investigate the concentration patterns of air pollution in public library and university libraries, and to evaluate indoor air quality in each library. The measurements and questionnaire survey of indoor air environment were performed to investigate the indoor air pollution level of the reading rooms. As a result, the profiles of air temperature, air humidity, air-flow, WBGT, the concentration of carbon dioxide(CO₂), carbon monoxide(CO), ozone(O₃), total suspended particles(TSP) and other conditions for physical comfort for the users were analyzed and presented. Mean temperature of this investigation was higher than optimum temperature of indoor air quality and relative humidity was similar to indoor air standard. Mean concentration of CO and TSP showed 0.9±0.2 ppm, 65±27 ㎍/㎥ which was below in the standard of air quality. However, CO₂ concentration appeared 1.366±277 ppm that was about 1.3 times higher than the standard of indoor air quality except one university. Correlation coefficients between users and air pollutants showed significant difference for CO₂. no significant difference for CO. The results of questionnaires research for indoor air qualities had no significant correlations. This reason showed that there was no concern about indoor air quality relatively to thermal conditions for the users.
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