AWWA Comment Period on ANSI/AWWA C651 – Disinfecting Water Mains

AWWA Comment Period on ANSI/AWWA C651 – Disinfecting Water Mains
August 11, 2023

AWWA solicits public comments on all proposed new AWWA Standards, and on all proposed revisions, reaffirmations, or withdrawals of existing AWWA Standards. The referenced standards project is being considered for approval and the publication of this notice begins the 45-day public comment period for AWWA and ANSI. An electronic public review copy of the proposed standard can be obtained for review during the comment period by emailing ETS Support. Comments must be submitted in writing to the AWWA contact listed below no later than the last day of the comment period specified herein. Such comments shall be specific to the section(s) of the standard under review and include sufficient detail so as to enable the reader to understand the commenter’s position, concerns and suggested alternative language, if appropriate.

AWWA Comment Period closes on Sept. 25, 2023.

Send comments to:
Amanda Dail
303.734.3466 phone

The review copy will be edited for publication and may also be revised as appropriate based on any comments received during the public comment period. Therefore, this copy is not suitable for continued utilization and is intended only for comment purposes.

Final publication of the standard may take several months. When it is available, a notice will be published in the official notice section of Journal – American Water Works Association. The standard becomes an effective AWWA standard on the first day of the month following such publication in Journal – American Water Works Association. 

SCOPE
This standard describes essential procedures for the disinfection of new and repaired potable water mains, including water mains used for temporary service when replacing or repairing existing water mains.

MAJOR REVISIONS
1.    The scope of the standard has been modified to include water mains used for temporary service when replacing or repairing existing water mains (Sec. 1.1).
2.    Definitions for potable water, reclaimed water, and wastewater have been added (Section 3).
3.    A requirement for disinfection chemical compliance with NSF/ANSI/CAN 60 has been added (Sec. 4.1).
4.    General considerations for the four methods of chlorination have been expanded (Sec. 4.2).
5.    The provisions for executing the four methods of chlorination have been expanded (Sec. 4.3, Sec. 4.4, Sec. 4.5, and Sec. 4.6).
6.    The Section 4 subsections on disinfection procedures (Sec. 4.7, Sec. 4.8, Sec. 4.9, Sec. 4.10, and Sec. 4.11) have been relocated to a new Section 5 on Procedures and renumbered as Sec. 5.1, Sec. 5.2, Sec. 5.3, Sec. 5.4, and Sec. 5.5, respectively. Sections 5 and 6 have been renumbered accordingly as Sections 6 and 7, respectively.
7.    Additional guidance on backflow prevention as a method of reducing risk from high chlorine levels and microbial contamination has been provided (Sec. 5.2.9).
8.    A new section on Inspection of Large Diameter Pipes Without Repair Work has been added (Sec. 5.5.5).
9.    A new appendix section on DPD Reagent Pillows Method No. 2 (for Field Test) has been added (Sec. A.2).
10.    The appendix section on High-Range Chlorine Test Kits has been expanded (Sec. A.3).
11.    Tables B.1 and B.2 in Appendix B on Chlorine Dosages have been modified.