The presence of E. coli in the water varied over time. Coyote scat also had E. coli of similar makeup..but this may be related to the fact the coyote is drinking that same water. What this does show is that surface water is prone to contamination from animal feces and this contamination can be passed to humans directly through intake of that water or potentially through food irrigated with that water.
CDC - Emerging and Infectious Disease
https://wwwnc.cdc.gov/eid/article/23/7/17-0226_article
Contaminated Stream Water as Source for Escherichia coli O157 Illness in Children
Abstract
In May 2016, an outbreak of Shiga toxin–producing Escherichia coli O157 infections occurred among children who had played in a stream flowing through a park. Analysis of E. coli isolates from the patients, stream water, and deer and coyote scat showed that feces from deer were the most likely source of contamination.
Contaminated Stream Water as Source for Escherichia coli O157 Illness in Children
Abstract
In May 2016, an outbreak of Shiga toxin–producing Escherichia coli O157 infections occurred among children who had played in a stream flowing through a park. Analysis of E. coli isolates from the patients, stream water, and deer and coyote scat showed that feces from deer were the most likely source of contamination.