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Total Coliform
A positive total coliform result triggers a utility assessment. It is not an exceedance: EPA has set no health goal for total coliforms since April 2016, and any assessment or violation EPA records is listed with this system's violations.
Health Effects
Not a health threat in itself; it is used to indicate whether other potentially harmful bacteria may be present
Source: EPA — National Primary Drinking Water Regulations (retrieved 2026-07-27)
On a private well?
This page covers Total Coliform in public water systems. Private wells are unregulated and not tested by anyone unless you arrange it.
Bacteria (coliform & E. coli) in private well water →Common Sources
- Coliforms are naturally present in the environment
- as well as feces
- fecal coliforms and E. coli only come from human and animal fecal waste
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Contaminant Type
Total Coliform is classified as a Bacteria contaminant.
Related Bacteria Contaminants
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Find out if Total Coliform is in your tap water.
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