What do the Radiation Network CPM numbers mean with regards to health risk?With the examples of radiation dose listed above, we can correlate how long it would take to experience those effects based on a hypothetical Geiger counter CPM number.
So, let’s use the number 100, since this is the threshold that the Radiation Network website has chosen. The Cs137 calibration factor listed above (120 CPM) was converted to obtain the proper factored results listed below (0.83x). Higher CPM numbers are also listed for relevancy.
Days compared with the avg. annual human exposure (U.S.)
207 (at 100 CPM)
42 (at 500 CPM)
14 (at 1,500 CPM)
2 (at 10,000 CPM)
In the fields of grain .... This measurement was made on June 4, 2011 at approx. 200pm CST. It indicates "elevated mid level" radiation levels. Alert level is considered anything over 100CPM by the radiation network ...
First background measurement, taken over the course of 10 minutes was 48.5 CPM.