Re: Background Radiation Information Sought

[BERNARD L COHEN <blc+@PITT.EDU>]

	My paper "Indoor radon maps of the United States" might be useful,

since radon is the dominant contributor to doses from natural radiation,

and it varies much more than does the gamma ray background radiation.



On Fri, 11 Jan 2002, Dave Derenzo wrote:



> 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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