Geometric Means, Statistical Threshold Values, and Microbial Die-Off Rates

Added by Robert Way • Last updated December 14, 2022
Type: Add-on / Supplemental Educational Material, Fact Sheets, Tools & Calculators
Topic: Ag Water (Preharvest), Produce Safety Rule (PSR), Ag Water (Postharvest)
Language: English

This document outlines how to perform key mathematical steps necessary to develop a microbial water quality profile (MWQP) and then calculate microbial die-off if the MWQP values exceed numerical Geometric Mean (GM) and Statistical Threshold Value (STV) criteria outlined in the Food Safety Modernization Act (FSMA) Produce Safety Rule. There are tools to make the calculations easier, but for those who want to know how to do the math, it is covered here.

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Geometric Means, Statistical Threshold Values, and Microbial Die-Off Rates

 

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