 |
Relative
Risks for Radon and Lung Cancer*
| Exposure
Level |
in pCi/L |
Lung Cancer
Excess Deaths/1000 |
Comparable Lung
Cancer Risk |
| |
> 100 |
200 + |
Uranium miner of the 1960s |
Maximum permissible
in mines now |
65 |
140-400 |
3-4 packs/day, 50 years |
| |
20 |
45-180 |
1.5 packs/day, 50 years |
| |
10 |
22-90 |
Light Smoker |
| EPA Action Level |
4 |
10-45 |
150 chest X-rays/year |
| Average indoor level |
1.5 |
3-16 |
Passive smoking |
| Average outdoor |
0.2 |
0.8-2 |
15 Chest X-rays/year |
*Adapted
from A Citizens Guide to Radon. Numerical risk values were reduced by 25%.
The maximum permissible value for miners appears high because they are exposed only 40
hours per week. |
|
|
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