What does the term "total coliform" signify?

The term "total coliform" refers to a broad category of bacteria that includes both fecal and non-fecal coliform organisms. Total coliforms are a group of related bacteria that are commonly found in the environment, including soil and vegetation, as well as in the intestines of warm-blooded animals.

By including both fecal and non-fecal coliform, "total coliform" serves as an indicator of water quality and potential contamination. The presence of total coliform in a water sample suggests that there may be a pathway for contamination from the environment or from fecal sources, making it an important component in water testing protocols used to assess drinking water safety.

This broad classification enables water quality professionals to monitor the overall microbial quality of water sources effectively, making the option that recognizes both types as correct highly relevant.