---
kind: "section"
citation: "40 C.F.R. § 141.543"
title: "40"
number: "141.543"
heading: "How is the disinfection benchmark calculated?"
url: "https://uscodex.org/cfr/40/141.543"
---

# §141.543. How is the disinfection benchmark calculated?


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.


## Notes

### Source

Source: 67 FR 1839, Jan. 14, 2002, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 300f, 300g-1, 300g-2, 300g-3, 300g-4, 300g-5, 300g-6, 300j-4, 300j-9, and 300j-11.

### Source

Source: 40 FR 59570, Dec. 24, 1975, unless otherwise noted.