TYPICAL BACKGROUND RADIATION LEVELS
U.S. National Average 300 millirem/year
Connecticut 284 millirem/year
Colorado (Denver) 364 millirem/year
France (near Radon Springs) 1,600 millirem/year
India (parts of) 1, 140 millirem/year
Brazil (parts of) 17,500 millirem/year
Note: An individual's exposure to radiation dose is measured in "rem."
Most radiation dose is so small that it is measured in millirem (1/1,000 or .001 rem).