| Country | Concentration (Bq/m3) | Dose (mSv) | |
| indoor | outdoor | ||
| World | 0.3 | 0.1 | 0.09 |
| China | 0.84 | 0.4 | 0.25 |
| Japan | 0.72 |
| 0.6 - 2.2 |
| Korea | 0.99 |
|
|
| America | 0.3 |
|
|
| Sweden | 0.5 |
| 0.1 |
| Greece | 0.9 |
| 0.29 |
| Romania | 1.0 | 0.2 | 0.26 |