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Updated: Feb 21, 2026

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RADON REFERENCE LEVELS AND PRIORITY AREAS CONSIDERING OPTIMISATION AND AVERTABLE LUNG CANCERS.

F Bochicchio1, G Venoso1, S Antignani1

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New radon safety guidelines emphasize optimizing exposure below the reference level, not just above the action level. This shift is expected to significantly reduce preventable lung cancer deaths.

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Area of Science:

  • Environmental Health
  • Radiation Protection
  • Public Health

Background:

  • Current radon protection strategies rely on 'action levels,' triggering interventions only above a certain concentration.
  • International regulations are shifting towards a 'reference level' concept for radon exposure management.
  • Radon-induced lung cancer remains a significant public health concern, necessitating updated protective measures.

Purpose of the Study:

  • To analyze the implications of the new 'reference level' concept for radon protection.
  • To compare the effectiveness of 'reference level' versus 'action level' approaches.
  • To propose policy actions for implementing updated radon regulations, including for 'Rn-prone' areas.

Main Methods:

  • Review of international radon regulations and recommendations.
  • Analysis of Italian data on radon exposure and lung cancer incidence.
  • Development of policy examples for implementing the 'reference level' concept.

Main Results:

  • The 'reference level' mandates optimization of radon exposure even below the threshold, unlike the 'action level'.
  • Implementation of the 'reference level' is projected to substantially increase avertable lung cancer deaths.
  • Designation of 'Rn-prone' areas as 'priority' areas is proposed for enhanced regulation.

Conclusions:

  • The shift from 'action level' to 'reference level' represents a paradigm change in radon protection.
  • Updated regulations based on the 'reference level' concept can lead to significant public health benefits by reducing lung cancer.
  • Proactive policy implementation is crucial for effectively managing radon exposure and its health risks.