Background Radiation Information Sought

[Dave Derenzo <dave@UIC.EDU>]

Dear Radsafers,



In one of my training classes, I use a very old slide of a US map with 

average background levels for each state.  The slide says the source of the 

data was EPA.  This slide does not include the radon contribution to the 

ede.  I would like to update this slide, but have had no luck in finding 

more recent information.  Can anyone point me to a reference that has this 

information on a state by state basis?  I have already tried NCRP 94, but 

unless I missed something, this information is not included.  A search of 

the EPA web site also was not productive.  Any help would be appreciated.



Thanks,

Dave Derenzo, RSO

University of Illinois at Chicago



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