http://www.committeetobridgethegap.org/pdf/PAGreport102208.pdf

Their measurements are in picoCuries per Liter (pCi/L)

Long-term cleanup is now proposed to use a much opposed process called “optimization”
that would allow the choice of radiation “benchmarks” as immensely high as 10 rem per year,
the equivalent of about 50,000 chest X-rays over a 30 year period and an associated cancer risk
of 1 in 3, according to current risk estimates prepared for EPA and other agencies.6 EPA
historically has insisted on an “acceptable” risk range of one in a million to one in ten thousand,
so contemplating “benchmarks” with a risk as high as every third person so exposed getting a
cancer from the exposure would be a radical departure from its entire history and ethically very
difficult to defend.7

The report has detailed footnotes and while I am not a scientist, I see no reason to doubt their findings. They have been asked to testify to congress.

A update on the initial article

Obama Administration Withdraws Action Before it is
Published in Federal Register

Feb. 13 — Victory! Obama Administration pulls back last-minute radiation regulation relaxation by Bush Administration, days before publication in the Federal Register. The regulation would have relaxed drinking water standards for radiation by factors of hundreds to millions. Fight not over. EPA reviewing the standards; could still issue them. Write EPA Administrator Lisa Jackson [put in address], congratulate her on pulling back these horrid standards and urge her to permanently block their issuance..

Editor’s Note: Our article was initially scheduled for publication on 5 Feburary 2009 and went live on Feburary 16th.