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.
Time series plots showing: (a) the log10 differences in the concentrations of E. coli and fecal enterococci; (b) the percent changes in the concentrations of caffeine and sucralose; and (c) the change in the caffeine/sucralose ratios, at the Forester Channel site. For (a, b), negative values indicate concentrations were higher upstream than they were downstream and positive values indicate concentrations were higher downstream than they were upstream.
