Frequent Questions

How does the drinking water PAG work with EPA’s existing Safe Drinking Water Act regulations?

The drinking water PAG is non-regulatory guidance for emergency situations only. Immediately following a radiological incident, community water systems must return to compliance with the EPA’s Radionuclides Rule. Public water suppliers will be required to take corrective measures to meet radionuclide standards as soon as practicable.

For more information, visit the Protective Action Guides (PAGs) page on

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