Most ANSI/AARST standards are updated under a continuous maintenance program. Consensus body review of comments received are generally scheduled to begin the second year after publishing. Topic by topic, the plan entails prioritizing concerns one by one until a complete review of public and committee concerns is complete.

Note—Most responses to comments and resulting incremental revisions take place during the second year after publication of a fully reviewed and thereby newly dated standard.

Protocol for the Collection, Transfer and Measurement of Radon in Water
The proposed revisions for publication include various changes in redline/cross-out style that
are mostly for clarity as reviewed by the current consensus body. A new Section 3 and
revisions to 5.3 and 5.4 were previously publicly reviewed.
This standard of practice contains minimum requirements and guidance for measuring radon in
water that enters a building through groundwater supplies for determining if mitigation is
necessary to protect current and future occupants of dwellings and other buildings. This
standard includes procedures for the collection and transport of water samples, as well as
protocols for the quantitative transfer of the sample to a measurement device to determine
radon concentrations in water.

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Deadline for Comments: May 25th, 2026