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RadNet

Monitoring Results from Virginia Beach, VA

RadNet stationary air monitors measure gamma radiation emitted from airborne radioactive particles as they collect on the monitor’s filter.

On this page:

Gamma Gross Count Rate

EPA uses RadNet monitors to track fluctuations in gamma radiation emitted from airborne radioactive particles at each of our sites. Tracking these changes over time gives a picture of the background (normal) levels and allows EPA scientists to detect any unusual changes. 

You can see a more detailed view of gamma detection across nine different energy ranges in our Gamma Gross Count Rate (by Energy Range) Graph.

Virginia Beach, NY - Gamma Gross Count Rate

Notes on the Graph

  • The Gamma Gross Count Rate shows how many gamma rays the monitor detects each minute.
  • There may be gaps in the data due to instrument maintenance/repairs, telecommunication disruption, server unavailability or other technical issues.
  • Gross gamma count rates may differ from monitor to monitor due to:
    • Cosmic radiation (increases with altitude)
    • Terrestrial radiation (types of radionuclides in the soil and building materials near the monitor)
    • Precipitation (increases in the deposition of radon and thoron decay products deposited around the monitor)
  • To view the individual data points shown on this graph, please use the query tool to search the RadNet database in EPA's Central Data Exchange.
  • More information about air monitoring data.

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