---
kind: "section"
citation: "40 C.F.R. § 141.708"
title: "40"
number: "141.708"
heading: "Requirements when making a significant change in disinfection practice."
url: "https://uscodex.org/cfr/40/141.708"
---

# §141.708. Requirements when making a significant change in disinfection practice.

- (a) Following the completion of initial source water monitoring under [§ 141.701(a)](/cfr/40/141.701.md?p=a), a system that plans to make a significant change to its disinfection practice, as defined in [paragraph (b)](#b) of this section, must develop disinfection profiles and calculate disinfection benchmarks for Giardia lamblia and viruses as described in [§ 141.709](/cfr/40/141.709.md). Prior to changing the disinfection practice, the system must notify the State and must include in this notice the information in [paragraphs (a)(1) through (3)](#a-1..a-3) of this section.
  - (1) A completed disinfection profile and disinfection benchmark for Giardia lamblia and viruses as described in [§ 141.709](/cfr/40/141.709.md).
  - (2) **A description of the proposed change in disinfection practice.**
  - (3) An analysis of how the proposed change will affect the current level of disinfection.
- (b) **Significant changes to disinfection practice are defined as follows—**
  - (1) Changes to the point of disinfection;
  - (2) Changes to the disinfectant(s) used in the treatment plant;
  - (3) Changes to the disinfection process; or
  - (4) **Any other modification identified by the State as a significant change to disinfection practice.**

## Notes

### Source

Source: 71 FR 769, Jan. 5, 2006, 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.