Background atmospheric 222Rn concentrations outdoors and indoors: a review.
Health Physics
|August 1, 1983
Summary
This study examines outdoor and indoor atmospheric radon levels, finding significant variations based on location and time. Average outdoor radon in the contiguous US is estimated at 250 pCi/m3, much lower in Alaska and Hawaii.
Area of Science:
- Environmental Science
- Atmospheric Chemistry
- Radiological Health
Background:
- Radon (Rn) is a naturally occurring radioactive gas.
- Understanding radon sources and variations is crucial for public health.
- Atmospheric radon concentrations differ between outdoor and indoor environments.
Purpose of the Study:
- To examine the sources of outdoor and indoor atmospheric radon.
- To quantitatively assess the variation of outdoor radon with environmental factors.
- To estimate average outdoor radon concentrations in the contiguous United States.
Main Methods:
- Quantitative assessment of outdoor radon variation.
- Analysis of radon concentration data based on time of day, season, altitude, and geography.
- Comparison of radon levels across different regions, including Alaska and Hawaii.
Main Results:
- Outdoor atmospheric radon varies significantly with time of day, year, altitude, and geographic location.
- Estimated mean outdoor radon concentration in the contiguous US is approximately 250 pCi/m3 (range 100-400 pCi/m3).
- Radon levels in Alaska and Hawaii are substantially lower than in the contiguous US.
- Indoor radon concentrations exhibit variability based on time of day, location, and elevation above ground.
Conclusions:
- Geographic location and environmental factors are key determinants of atmospheric radon levels.
- Significant regional differences in radon concentrations exist within the United States.
- Further research into indoor radon dynamics is warranted to inform mitigation strategies.
