Government doesn't regulate for your safety. Look at how the EPA raised allowable radiation levels after Fukushima---

The EPA maintains a set of so-called "Protective Action Guides" (PAGs). These PAGs are being quickly revised to radically increase the allowable levels of iodine-131 (a radioactive isotope) to anywhere from 3,000 to 100,000 times the currently allowable levels.

The group Public Employees for Environmental Responsibility (PEER) is all over this issue, having obtained internal emails from a FOIA requests that reveal some truly shocking revelations of the level of back-stabbing betrayal happening inside the EPA. For example, under the newly-revised PAGs, drinking just one glass of water considered "safe" by the EPA could subject you to the lifetime limit of radiation.

http://www.naturalnews.com/031963_radiation_exposure.html