400 854 f28 17e 439 1e8 f09 d3c 30f a8a e39 079 2f9 556 120 a77 219 9ad bd0 438 38a 9f2 db7 556 fcb b0f c6e e1e 9e1 a95 134 fc5 de5 4f7 795 db2 1ff bd3 88a e5b e5b fc7 5ce a50 649 600 13f 1b8 bda 114 a02 57e cd6 83d 30d 9c0 fa4 9c2 69a f30 d7b 750 024 238 e51 a28 cc0 81e ead 457 7a1 b01 896 6b2 da9 881 95a 724 800 a09 d73 1de 927 b14 1ef 1ef 7be 965 395 dd6 472 fce 19a c41 392 508 dc7 3fd 3fd eb7

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.