What must be done if there is a positive BAC-T sample?

When a positive Bacteria (BAC-T) sample is identified, it's crucial to take timely actions to protect public health and ensure water safety. The requirement to take repeat samples within 24 hours is based on regulatory protocols that help confirm whether the initial positive result was accurate and to determine the extent of contamination.

Taking repeat samples helps in assessing the situation effectively. If subsequent samples are negative, it may indicate that the initial positive was a false alarm, perhaps due to sampling or testing errors. Conversely, if the repeat samples remain positive, it signifies an ongoing contamination issue that requires prompt investigation and resolution.

While reporting to health authorities and notifying the public water supply is important, these actions typically follow the collection of repeat samples and are often part of the broader response actions if contamination is confirmed. Closing the water supply, although a potential measure for severe contamination, is generally considered a last resort and not the immediate first step when an initial positive test result occurs.

Thus, taking repeat samples within the specified timeframe is a critical and protocol-driven step to ensure appropriate next actions can be taken based on the most current information available about the water supply's safety.