File Name : figure s1.jpg

Caption : figure s1. county-level map of california showing the location of santa ana relative to the nearest airport (john wayne airport).

File Name : figure s2.jpg

Caption : figure s2. boxplots of concentrations for heavy metals in soil samples (n=1,528). the centerline and “x” symbols indicate the sample median and mean, respectively. lower and upper boundaries of each box indicate the interquartile range (iqr) of the sample. the lower and upper whiskers indicate the minimum and maximum data points after excluding outliers as defined as q1–1.5×iqr and q3+1.5×iqr. outliers are depicted as individual points. 

File Name : figure s3.jpg

Caption : figure s3. zoning map of santa ana, showing multiple landuse types throughout the city (source: city of santa ana, open-source gis data).

File Name : figure s4.jpg

Caption : figure s4. total population and median household income by census tract in santa ana, ca.