AWWA COMMENT PERIOD ON AWWA A100, Water Wells

AWWA COMMENT PERIOD ON AWWA A100, Water Wells
March 6, 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 April 20, 2026.

Send comments to:
Amanda Dail, ADail@awwa.org
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 Therefore, this copy is not suitable for continued utilization and is intended only for comment purposes.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 the minimum requirements for vertical water supply wells and is intended primarily for municipal and industrial applications.

MAJOR REVISIONS
Major revisions made to the standard in this edition include the following:

1. Included considerations for compliance or certification of well drilling and development chemicals to NSF/ANSI/CAN 60 (Sec. III.A. and Sec. 4.3.1.1).
2. Added definitions for filter pack, filter-pack material, and potable water and revised the definition for filter-packed well (Sec. 3).
3. Revised the recommended range for the ratio of grain size of filter-pack material to formation material (Sec. 4.3.6.8).
4. Included manufactured material (e.g. glass beads) in the filter-packed wells section (Sec. 4.5.5.2).
5. Changed filter pack thickness (Sec. 4.6.2).
6. The disinfection section was rewritten to include new subsections on filter pack disinfection, sampling and testing, and dechlorination. The well disinfection subsection now includes more detail, including recommended pH range for the chlorine solution. The overdosing subsection was replaced with reference to ANSI/AWWA C654 and ANSI/AWWA C655.
7. Appendix I was expanded and clarified.