Why is the membrane filter technique useful for sanitarian working in the field?

The membrane filter technique is useful for sanitarians in the field because it allows for the efficient and accurate detection of microorganisms in water samples. This method involves filtering a water sample through a membrane that traps bacteria, which can then be cultured and counted. It is portable, relatively quick, and provides clear results, making it ideal for assessing water quality in various environments. Additionally, it enables field workers to identify potential contamination sources and ensure public health safety.