[logi_cal869]

The EPA believes that 7,410 Bq/m3 is the safe limit in drinking water, and presumably they've done the math far more than twice.

Care to explain/revise that statement? (talk about scary numbers)

[mvpel]

Care to explain/revise that statement? (talk about scary numbers)

What's unclear? The statement itself is entirely factual and needs no revision, as it is a straight conversion from 200 picocuries per liter which is the EPA's drinking water limit for Cs-137.