The presence of a particular group of bacteria in water bodies indicates contamination. Identify the group.

The presence of coliform bacteria in water bodies is often an indicator of contamination. Coliform bacteria are a group of bacteria that are commonly found in the intestines of warm-blooded animals, including humans. The presence of coliform bacteria in water suggests that fecal contamination may have occurred, as these bacteria are associated with the digestive tracts of animals. One specific type of coliform bacteria that is frequently used as an indicator of water contamination is Escherichia coli (E. coli). Monitoring coliform levels in water is a common practice to assess water quality and potential health risks associated with the presence of fecal contamination.