What amount of Total Coliform indicates a water system violation?

In accordance with the Total Coliform Rule, five (5) percent of a water system’s monthly samples can be Total Coliform positive. 

A water system is in violation of the rule if more than five percent of its monthly samples are positive. 

Such a violation requires that a public notice be advertised in the newspaper acknowledging the violation. This type of violation does not result in a boil water advisory.

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1. Total Coliform and Fecal Coliform: what’s the difference?
2. Where are the water supply samples taken from?
3. How are water supply quality samples analyzed?
4. What happens if a sample tests positive for Total or Fecal Coliform?
5. What amount of Total Coliform indicates a water system violation?
6. What if Fecal Coliform is detected in a routine sample?