Frequent Questions

What has changed since the 2013 interim PAG Manual?

EPA received comments from members of the public, state and local emergency response and health organizations, industry associations, and from national and international radiation protection organizations. Significant changes were made based on these comments including:

  • Clarifying planning considerations related to the lower FDA Potassium Iodide (KI) guidance
  • Deleting the thyroid-based evacuation threshold
  • Providing additional language on the using Federal Radiological Monitoring and Assessment Center (FRMAC) derived value tables
  • Adding information from the appendices of the 1992 PAG Manual on how the PAG levels were set
  • Providing explanation about the removal of the Relocation PAG of 5 rem over 50 years to avoid confusion with long-term cleanup goals
  • Adding a two-tiered drinking water guidance addressing the people at the most sensitive life stages and the general population
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