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. Author manuscript; available in PMC: 2015 Apr 1.
Published in final edited form as: Indoor Air. 2013 Sep 23;24(2):213–220. doi: 10.1111/ina.12065

Figure 1. Risk of PM2.5 concentrations exceeding 1000 μg/m3 by time of day and time of year in households with no obvious source of particulate matter.

Figure 1

(A) Model estimates of the probability that PM2.5 exceeds 1000 μg/m3 by time of day. Axes are on a logarithmic scale for visualization purposes. (B) Model estimates of the probability that PM2.5 exceeds 1000 μg/m3 by time of day and time of year. (C) Mean number of minutes over 24-hours that PM2.5 exceeds 1000 μg/m3 by time of year in these households using a loess curve.