Table 1: Distribution of measured indoor and outdoor (central site) PM2.5 concentrations and its BC and sulfur constituents.

From: Development of a modeling approach to estimate indoor-to-outdoor sulfur ratios and predict indoor PM2.5 and black carbon concentrations for Eastern Massachusetts households

 IndoorCentral site
 MeanSDMeanSD
PM2.5 (μg/m3)8.86.56.52.2
BC (μg/m3)0.240.260.580.24
Sulfur (μg/m3)0.300.150.450.19