Factors Common Sources of Radiation Your Annual Dose
Where
You
Live

Cosmic Radiation (from outer space)
Exposure depends on your elevation (how much air is above you to block radiation).  Amounts listed are per year.


26 mrem
Terrestrial (from the ground)
I live in a state that borders the Gulf or Atlantic coasts (16 mrem)
I live in the Colorado Plateau area (around Denver) (63 mrem)
I live elsewhere in the continental U.S. (30 mrem)
30 mrem
House Construction
I live in a stone, adobe, brick, or concrete building (7 mrem)
0 mrem
Power Plants
I live within 50 miles of a nuclear power plant (0.01 mrem)
I live within 50 miles of a coal-fired power plant (0.03 mrem)
0 mrem
Food
Water
Air

Internal Radiation
From food (Carbon-14 and Potassium-40) and from water (radon dissolved in water)
40 mrem
From air (radon)
200 mrem
How
You
Live

Weapons test fallout (less than 1 mrem)
1 mrem
Jet plane travel hours: (0.5 mrem per hour in the air)
0 mrem

I have porcelain crowns or false teeth (0.07 mrem)
0 mrem

I've gone through luggage inspection at the airport (0.002 mrem)
0 mrem

I watch TV (1 mrem)
0 mrem

I use a video display terminal (computer screen) (1 mrem)
0 mrem

I have a smoke detector (0.008 mrem)
0 mrem

I use a gas camping lantern (0.2 mrem)
0 mrem

I wear a plutonium-powered pacemaker (100 mrem)
0 mrem
Medical
Tests

Medical Diagnostic Tests

Number of millirems are per procedure and are average values.  Actual numbers may vary.  Enter the number of procedures per year.
X-Ray - Extremity (arm, hand, foot, leg):
(1 mrem)
0 mrem
X-Ray - Dental:
(1 mrem)
0 mrem
X-Ray - Chest:
(6 mrem)
0 mrem
X-Ray - Pelvis/Hip:
(65 mrem)
0 mrem
X-Ray - Skull/Neck:
(20 mrem)
0 mrem
X-Ray - Barium Enema:
(405 mrem)
0 mrem
X-Ray - Upper GI:
(245 mrem)
0 mrem
Nuclear Medicine (e.g. thyroid scan):
(14 mrem)
0 mrem

Your Estimated Annual Radiation Dose:  296 mrem




Primary sources for this information are National Council on Radiation Protection and Measurements Reports: #92 Public Radiation Exposure from Nuclear Power Generation in the Untired States (1987); #93 Ionizing Radiation Exposure of the Population of the United States (1987); #94 Exposure of the Population in the United States and Canada from Natural Background Radiation (1987); #95 Radiation Exposure of the U.S. population from Consumer Products and Miscellaneous Sources, (1987); and #100 Exposure of the U.S. Population from Diagnostic Medical Radiation (1989).