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. Author manuscript; available in PMC: 2018 Jan 1.
Published in final edited form as: Epidemiology. 2017 Jan;28(1):77–85. doi: 10.1097/EDE.0000000000000556

Table 1.

Summary statistics for daily GEOS-Chem PM2.5 concentrations (calibrated) from wildfire sources and non-fire sources in 561 western US counties (µg/m3) during the wildfire season (May 1– Oct. 31), 2004–2009.

Minimum 25th Percentile Median Mean 75th Percentile Maximum
PM2.5 from wildfires 0 0.09 0.3 2.0 1.2 242
PM2.5 from non-fire
sources
0 4.4 6.2 7.0 8.7 45.1