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Code of Federal Regulations Title 40. Protection of Environment § 40.141.543 How is the disinfection benchmark calculated?

Current as of January 02, 2025 | Updated by Findlaw Staff

If your system is making a significant change to its disinfection practice, it must calculate a disinfection benchmark using the procedure specified in the following table.

To calculate a disinfection benchmark your system must perform the following steps

Step 1: Using the data your system collected to develop the Disinfection Profile, determine the average Giardia lamblia inactivation for each calendar month by dividing the sum of all Giardia lamblia inactivations for that month by the number of values calculated for that month.

Step 2: Determine the lowest monthly average value out of the twelve values. This value becomes the disinfection benchmark.
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Cite this article: FindLaw.com - Code of Federal Regulations Title 40. Protection of Environment § 40.141.543 How is the disinfection benchmark calculated? - last updated January 02, 2025 | https://codes.findlaw.com/cfr/title-40-protection-of-environment/cfr-sect-40-141-543/

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