Observatoire de la qualité de l’air intérieur (OQAI)
Centre scientifique et technique du bâtiment (CSTB)
84, avenue Jean Jaurès
77447 Champs-sur-Marne Cedex 02
As part of a nationwide indoor air quality survey performed in schools in France between 2013 and 2017, an exploratory and multidimensional analysis of the data was conducted to understand the complexity of pollutant mixtures in classrooms. Five pollution profiles were identified: classrooms with multiple chemicals in air and settled floor dust (21%), classrooms with multiple chemicals either in air (19%) or in settled dust (24%), classrooms with low air and settled dust pollution (19%) and classrooms only polluted by phthalates (17%). The pollution profiles were characterized by using the descriptive data of the buildings, the outdoor environment, and the activities. The classrooms with multiple chemicals were found mostly in old buildings without mechanical ventilation systems. Classrooms with the highest volatile organic compound (VOC) concentrations were often located in suburban and urban areas where outdoor VOC concentrations are also higher.