Extended Data Fig. 3: Influence of wildfire smoke on daily PM2.5 extremes is mainly concentrated in states in the West, Northwest, and Great Plains.
From: The contribution of wildfire to PM2.5 trends in the USA

Black lines in each plot show percent of days in each state-year where PM2.5 values exceed 35 µg/m3, calculated using the sample of stations with over 50 observations in at least 15 years, as in Fig. 3. Blue lines show estimated percent of days that exceed 35 µg/m3 after smoke PM2.5 has been removed. Vertical dotted line indicates median CONUS-wide estimated breakpoint (2012).