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AWWA C655-25 Field Dechlorination, 2025
- Foreword [Go to Page]
- IV. Major Revisions. Major revisions made to the standard in this edition include the following:
- II.A. US Regulations. [Go to Page]
- II.C. Determination of Method for Dechlorination. Development of a Disinfection and Dechlorination Plan is needed for work performed under standards ANSI/AWWA C651 (Disinfecting Water Mains), ANSI/AWWA C652 (Disinfection of Water Storage Facilities), ANSI [Go to Page]
- II.D. Chemical Handling Precautions. The chemicals used for dechlorination can cause skin, eye, nose, throat, and lung irritation. Personnel are advised to use caution and to wear protective clothing (including but not limited to gloves, apron, goggles, a
- I.A. Background. This standard describes procedures, materials, and requirements for the dechlorination of chlorinated water discharges or discharges of water treated with chloramines. It includes nonchemical and chemical dechlorination, disinfection and [Go to Page]
- I.B. History. The first version of this standard was approved by the AWWA Board of Directors on June 14, 2009, and the last edition was approved on Jan. 20, 2018. This edition was approved on Mar. 27, 2025. [Go to Page]
- I.C. Acceptance. In May 1985, the US Environmental Protection Agency (USEPA) entered into a cooperative agreement with a consortium led by NSF International (NSF) to develop voluntary third-party consensus standards and a certification program for direct
- III. Use of This Standard. It is the responsibility of the user of an AWWA standard to determine that the products described in that standard are suitable for use in the particular application being considered. [Go to Page]
- III.A. Purchaser Options and Alternatives. This standard is written as though the dechlorination work will be performed by the purchaser’s personnel. Where the work is to be done for a separate contract or as part of a contract for installing mains,** app [Go to Page]
- III.B. Modification to Standard. Any modification of the provisions, definitions, or terminology in this standard must be provided by the purchaser.
- AWWA Standard
- SECTION 1: GENERAL
- Sec. 1.1 Scope
- Sec. 1.2 Purpose
- Sec. 1.3 Application
- SECTION 2: REFERENCES
- SECTION 3: DEFINITIONS
- SECTION 4: REQUIREMENTS
- Sec. 4.1 Materials
- Sec. 4.2 Nonchemical and Chemical Dechlorination
- Sec. 4.3 Disinfection and Dechlorination Plan and Procedures
- SECTION 5: VERIFICATION
- Sec. 5.1 Residual Chlorine Level
- Sec. 5.2 Residual Testing
- SECTION 6: DELIVERY [Go to Page]
- APPENDIX A [Go to Page]
