This 2009 guideline produced by the EPA puts action levels for radiation at 300 CPM but notes the following
"Standard EPA Emergency Response Protocol is to screen for radiation with a Micro-R at all emergency responses. If readings are three times background, responders consult with a Health Physicist."
The beta levels registering in much of the US recently have been grossly exceeding 3 times background and have, in fact, grossly exceeded 300 CPM in many areas.
The EPA should be explaining these levels.
Why are reported levels so high?