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This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »
RadNet air monitors analyze radiation emitted from particulates collected on air filters. These results are presented as a gamma gross count rate measurement. Measuring data in counts per minute allows EPA scientists to detect anomalies by tracking changes over time.
For more information, visit RadNet.