FIGURE 2.
Concentration of EC (A) and IE (B) in the three locations chosen, Boxes, 25th and 75th percentile; Whiskers, 10th and 90th percentile; inside the boxes, median.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.