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Is Gamma Radiation Dangerous?

The National Council of Radiation Protection (NCRP) has set federal guidelines for residential exposure to radiation. This limit is 0.058 mR/hr, which can also be expressed as 0.000058 R/hr. This guideline covers any type of radiation, man-made or natural.

It has not been clearly established that exposures above this level lead to increased mortality (death rates), but many medical professionals believe that any exposure to radiation leads to an increased incidence (chance) of cancer.