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Up For Public Review

Public Review: CCAH Revisions (10/2024)

Soil Gas Control in New Construction of 1 & 2 Family Dwellings and Townhouses


These proposed revisions respond to comments from content publicly reviewed 5/17/24 to 7/1/24 for ANSI/AARST CCAH. The continuous maintenance project has sought to harmonize CCAH with more recent work on ANSI/AARST CC-1000.
Click to download

The provisions in this standard of practice provide prescriptive minimum requirements for newly
constructed one- and two-family dwellings and townhouses in order to reduce occupant exposure to radon and other hazardous soil gases. All current 2024 revisions can be downloaded here.


Deadline for Comments: November 3rd, 2024

Public Review: MS-PC

Performance Specification for Instrumentation Systems Designed to Measure Radon Gas in Air

Consistent with plans relative to our continuous maintenance program, the latest publication of ANSI/AARST MS-PC is being published for public review.

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 7th, 2024

Public Review: MS-QA

Radon Measurement Systems Assurance Systems

Consistent with plans relative to our continuous maintenance program, the latest publication of ANSI/AARST MS-QA is being published for public review.

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 7th, 2024

  • The latest publications of these standards are available for comparison on this website where all ANSI/AARST standards can be found for review at no charge, and for purchase. Click here to access or purchase standards.
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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