Concentrations of NO2 and other traffic related contaminants in office buildings located in urban environments

The concentrations of nitrogen dioxide (NO2) and other traffic related contaminants were measured both indoors and outdoors at four different office buildings located in urban environments. In addition to NO2, concentrations of the following compounds were measured: nitrogen monoxide (NO), carbon monoxide (CO), total volatile organic compounds (TVOCs), particulate polycyclic aromatic hydrocarbons (PAHs) and particles. Each data series was obtained by continuous measurements for periods of up to one week. The measurements show a clear correlation between the outdoor concentrations of all the studied compounds. Indoor NO2 sinks are indicated in three of the buildings studied.