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2. Radium and radon in the environment - Wikipedia

   en.wikipedia.org/wiki/Radium_and_radon_in_the...

   In a working mine, the radon level can be controlled by ventilation, sealing off old workings and controlling the water in the mine. The level in a mine can go up when a mine is abandoned; it can reach a level which can cause the skin to become red (a mild radiation burn). The radon levels in some of the mines can reach 400 to 700 kBq m −3. [17]

3. Health effects of radon - Wikipedia

   en.wikipedia.org/wiki/Health_effects_of_radon

   Under this modeling, the best policy is obviously to reduce the radon levels of all homes where the radon level is above average, because this leads to a significant decrease of radon exposure on a significant fraction of the population; but this effect is predicted in the 0–200 Bq/m 3 range, where the linear model has its maximum uncertainty ...

4. Radon - Wikipedia

   en.wikipedia.org/wiki/Radon

   If levels are 20 picocuries radon per liter of air (800 Bq/m 3) or higher, the home owner should consider some type of procedure to decrease indoor radon levels. Allowable concentrations in uranium mines are approximately 1,220 Bq/m 3 (33 pCi/L) [ 102 ]

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6. Indoor air quality - Wikipedia

   en.wikipedia.org/wiki/Indoor_air_quality

   The World Health Organization (WHO) sets the ideal indoor radon levels at 100 Bq/m-3. [97] In the United States, it is recommend to fix homes with radon levels at or above 4 pCi/L. At the same time it is also recommends that people think about fixing their homes for radon levels between 2 pCi/L and 4 pCi/L. [ 98 ] In the United Kingdom the ...

7. Orders of magnitude (radiation) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude...

   Human internal radiation due to radon, varies with radon levels [8] 2 2 × 10 ^ 0: Acute-Head CT [7] 3 3 × 10 ^ 0: Annual: 0.34: USA average dose from all natural sources [6] 3.66 3.66 × 10 ^ 0: Annual: 0.42: USA average from all sources, including medical diagnostic radiation doses [citation needed] 4 4 × 10 ^ 0: Duration of the pregnancy: 0.6