AWWA COMMENT PERIOD ON AWWA B604, Granular Activated Carbon

AWWA COMMENT PERIOD ON AWWA B604, Granular Activated Carbon
September 25, 2026

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 (ETSsupport@awwa.org). 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 November 9, 2026.

Send comments to:
Ian Nebendahl, INebendahl@awwa.org
303.347.6283 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 Therefore, this copy is not suitable for continued utilization and is intended only for comment purposes.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 virgin granular and extruded activated carbons for use as a filter medium and adsorbent in water treatment. It involves the selection, placement, and use of granular activated carbon (GAC) in filter adsorbers where the GAC must function as filter medium and adsorbent, as well as in those systems where the primary function is adsorption.

MAJOR REVISIONS
Major revisions made to the standard include the following:

1. Minor boilerplate updates to the following sections:
   • C. Acceptance
   • A. Purchaser Options and Alternatives
   • Section 2: References
   • 4.1 Materials
2. Updates in Section 5.1 Sampling providing new information and context
3. Minor changes to Section II. F Abrasion addressing Ball Pan Hardness