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Why does the EPA test air filters for radionuclides?

The RadNet system provides continuous, near-real-time measurements of radiation levels across the country during normal and emergency conditions, and it is the only national radiation monitoring system in the United States. RadNet's laboratory analyses provide greater analytical sensitivity and have the capability to measure the samples using a wide range of analytical techniques that can be selected as indicated by a specific radiological event. Through routine air monitoring and air filter analysis, the EPA is able to establish normal background levels of radioactivity and detect additional activity from man-made radioactive sources.

For more information, visit RadNet.

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