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Up For Public Review

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.

Public Review of proposed administrative updates to ANSI/AARST MAH – 2023

(Protocol for Conducting Measurements of Radon and Radon Decay Products in Homes)

This standard of practice specifies procedures and minimum requirements when measuring radon concentrations in single-family residences for determining if radon mitigation is necessary to protect current and future occupants.


(Click here to download)

Deadline for Comments: September 28th, 2025

Public Review: MS-PC

In response to public comments, only two minor details are being proposed for revision to ANSI/AARST MS-PC 2022.
This standard specifies minimum performance criteria and testing procedures for instruments and/or systems designed to quantify the concentration of 222 Rn gas in air. These are consistent with general performance criteria applicable to the wide variety of radon measurement devices used for indoor measurements, primarily in residential environments or buildings not associated with the possession or handling of radioactive materials.

(Click here to download)

Deadline for Comments: October 12th, 2025

Public Review: MS-QA

In response to public comments, only two minor details are being proposed for revision to ANSI/AARST MS-QA 2023.
This standard of practice specifies minimum requirements for quality systems designed to quantify the concentration of 222 Rn gas in air by qualified professionals and laboratories, whose data are intended to be used to determine the need for, or success of, radon mitigation.

(Click here to download)

Deadline for Comments: October 12th, 2025

Public Notice of Seated Participants on Repopulated Committees 2025:
Executive Stakeholder Committee
Radon Measurement
Radon In Water
Radon Mitigation
Quality Assurance

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This calendar shows tentative schedules for committee meeting activity.  Schedules are subject to change.

For most electronic meetings, guests are allowed when desired or approved by the chair. For meetings scheduled that are open to the public, the meeting will be announced as such. 

  • User Tools ……………….. Example templates for field or office
  • Approved Addenda ………. Incremental updates not yet included in published versions
  • Interpretations ……………. Responses to inquiries
  • Position Statements ……… Positions approved by consensus