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B. Radon Professionals :

HUD Multifamily Accelerated Processing (MAP) Guide, HUD Handbook 4430.G (2020 ed., rev. Mar. 19, 2021) · 2026 edition · updated 2026-10-05 · United States

  1. All testing of existing properties, post-construction testing, and any mitigation required as a result of this testing must be performed by, or under the direct supervision of a Radon Professional, in accordance with the protocols referenced in this section.

  2. Radon Certification/License of the Radon Professional is required as follows:

    • Certification from either the American Association of Radon Scientists and Technologists (AARST) National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB); and
  • Certification/License from the state in which the testing or mitigation work is being conducted if the state has this requirement.

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▸Contents — HUD Multifamily Accelerated Processing (MAP) Guide, HUD Handbook 4430.G (2020 ed., rev. Mar. 19, 2021)
HUD Multifamily Accelerated Processing (MAP) Guide, HUD Handbook 4430.G (2020 ed., rev. Mar. 19, 2021)

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