Where do microbiological criteria come from? It’s not unlike the question that is frequently answered with the birds and the bees story, except in this case it is usually adult professionals asking the question about microbiological control.
How are microbiological standards set? What is the scientific way to set guidelines, limits, or standards? Skeptics might speculate that they were someone’s guess, or perhaps that some “knowledgeable expert” group dreamt them up at a clandestine meeting. Mayb…