Hello:
There seems to be a delay in posting data on the sudden sharp increase in Gross beta counts in early July at Charlotte NC and at several other sites. June 15th remains the last posting date for this site, and Jun 11 for Greensboro. I and others are concerned about the source of this. Does analysis work stop for the Summer?

Please note that Radnet data is updated quarterly in Envirofacts, and the last quarter data has not been released from QA yet. At this time we do not have a projected time frame for release.

Thank you for your interest in EPA's RadNet system.

Regarding your questions about the beta detector readings in Charlotte, NC, in July 2015, the real-time data are measurements of particulate collected on the air filter. These measurements generally indicate relative abundances of short-lived, naturally occurring background radiation such as radon products, which have short half-lives. Increases in background radiation occur frequently during light precipitation or if there is an overcast sky with an inversion. Because of their short half-lives, the abundance of these naturally occurring radionuclides are greatly reduced when analyzed a few days later at the laboratory.

I hope you find this information helpful.

Radiation Protection Division