4c2 346 f80 896 7d3 78a 3c1 461 439 ea7 9bc 1f0 cf1 ed3 8e1 53c 3b4 446 dcf c6a 0f3 4ad 258 fc3 67e 451 b8b 841 237 00a 893 e0a b5b 860 165 65f 9fe 114 8d0 428 1b3 9d6 82b 504 df8 373 75e cf3 a93 4a4 e43 f6e de7 820 b4a e0d 483 a6d 2fa d81 b6a 10b 1ad 611 3c6 87e e58 7e1 a01 fbd 08a 874 fac 0d9 4c6 552 2dd 5ad 133 def 7ac 0c0 38d 15c d0f e12 91a e7d 958 dfe 328 723 5b6 316 19b 81d c2a b42 3af 60d

On average, Americans receive a radiation dose of about 0.62 rem (620 millirem) each year. Half of this dose comes from natural background radiation. Most of this background exposure comes from radon in the air, with smaller amounts from cosmic rays and the Earth itself.

What is the average background radiation per year in the United States?

According to the National Council on Radiation Protection and Measurements (NCRP), the average annual radiation dose per person in the U.S. is 6.2 millisieverts (620 millirem) . The pie chart below shows the sources of this average dose. Most of our average annual dose comes from natural background radiation.

What is the normal level of background radiation?

Naturally-occurring background radiation is the main source of exposure for most people. Levels typically range from about 1.5 to 3.5 millisievert per year but can be more than 50 mSv/yr.

What is normal background radiation per hour?

That is a level experts describe as minimal, and just below the global average of naturally occurring background radiation of 0.17-0.39 per hour, a range given by the World Nuclear Association.

What percentage of human exposure is background radiation?

As can be seen, natural background radiation, also called “ubiquitous” since it is around us at all times, is the largest source of radiation exposure to humans (50% or about 3.1 mSv).

How much radiation does a phone give off?

The Federal Communications Commission (FCC) — which regulates cell phones, among other things, in the United States — has set radiation standards for cell phones at 1.6 watts per kilogram averaged over 1 gram of tissue.

What is the maximum radiation exposure per year?

Adult: 5,000 Millirems The current federal occupational limit of exposure per year for an adult (the limit for a worker using radiation) is "as low as reasonably achievable; however, not to exceed 5,000 millirems" above the 300+ millirems of natural sources of radiation and any medical radiation.

What level of radiation is safe on a Geiger counter?

So the background radiation level in my office is varying roughly between 0.05-0.10 uSv/hr, which is a normal, safe level of background radiation (see Radiation Units below).

How much radiation can a human take?

Adult: 5,000 Millirems. The current federal occupational limit of exposure per year for an adult (the limit for a worker using radiation) is "as low as reasonably achievable; however, not to exceed 5,000 millirems" above the 300+ millirems of natural sources of radiation and any medical radiation.

How much radiation is too much on a Geiger counter?

* Exposure to 100 mSv a year is the lowest level at which any increase in cancer risk is clearly evident. A cumulative 1,000 mSv (1 sievert) would probably cause a fatal cancer many years later in five out of every 100 persons exposed to it.