What happens if a repeat sample is TC+?

Study for the Water Treatment Class E Test. Prepare with flashcards and multiple choice questions, each question features hints and explanations. Get ready for your certification exam!

When a repeat water sample tests positive for total coliform (TC+), it indicates a potential contamination problem in the water supply. This necessitates further investigation because total coliforms are indicators of the water's microbiological quality and possible fecal contamination.

Analyzing the repeat sample specifically for E. coli is critical because E. coli is a specific type of coliform bacteria that can indicate the presence of fecal contamination, which poses a risk to public health. A positive result for E. coli would confirm the suspicion of contamination and initiate necessary public health responses or remedial actions. Therefore, testing for E. coli following a TC+ result is essential for ensuring that the water meets safety standards and protecting consumer health.

In contrast, simply reporting the sample after 48 hours, indicating no further action is needed, or skipping additional samples does not address the underlying public health concern raised by a repeat TC+ result. Such inaction could lead to unsafe drinking water and potential outbreaks of waterborne diseases.

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