This paper presents a study about environmental monitoring data for cleanrooms ( A, B, C and D classified areas). The parameters that were compared are: total airborne particles of 0.5 and 5.0 µm, airborne colony forming units (CFU's) and CFU's on surfaces (Rodac®). In these areas sampling was performed "at rest" and "dynamic" conditions, before and after sanitization and during certification and routine basis. Available data in literature indicates that the parameters are not particularly dependent upon the lay out or classification of areas, but rather on the use of the areas, and the operators behaviour. Evaluating the data, the conclusion was about a correlation among different sampling places, for total airborne particles of 0.5 and 5.0 µm, and absence of this kind of correlation in laminar flows positions. Also, correlation values were always increasing with the cleanless of the environment. The microrganisms most frequently isolated in areas B, C and D were Bacillus sp, Staphylococcus sp and Corynebacterium sp.
Clean rooms; Environmental monitoring; Viable particles; Nonviable particles; Microrganisms
