eff 7ce 0b2 528 8ed bd4 1da 238 cfa 3ad 601 01a df8 893 73c 362 bb6 92e b22 ba1 9ae 220 be9 cfd 901 f27 507 72a f70 5a4 01d 8e8 7f7 a0f 131 fbb 716 42f 6ba 86b 2c7 5bc 8a9 da6 032 322 4a8 f57 3f6 b54 9fe 7f0 d94 119 654 828 d9d 348 c86 23e 6ed 1a3 cf2 265 c1e c50 ec7 0ad fed 283 bda aa8 eb2 234 443 de0 12e fe0 e06 081 c70 db7 86b b59 40a b94 b63 eb7 0e9 d9b e38 65f 7b0 53c b72 89b 9bf 9c3 77c 309

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.