The phrase "average radon concentration" is correct and usable in written English.
It can be used in contexts related to environmental science, health studies, or discussions about air quality and radon levels.
Example: "The average radon concentration in homes across the region has raised concerns among health officials."
Alternatives: "mean radon level" or "typical radon concentration".
One important outcome of the survey is the prediction of the fraction of houses in each municipality with an annual average radon concentration above 200 Bq m−3.
Conclusion: The present follow-up demonstrated that increased incidence of lung cancer depends linearly on exposure in terms of average radon concentration in the course of the previous 5 34 years.
The worldwide average radon concentration of 40 Bq/muchmuchigherer than in the Netherlands, and the large decrease potentially achieved by the high ventilation rates common in hospitals, suggest that even considerably higher reductions are possible in other countries.
Dwelling KH-30 generated a high average radon concentration of 130 ± 13, 131 ± 13, and 172 ± 13 Bq m−3 in its three principle rooms, respectively, and a total average value of 143 ± 13 Bq m−3.
The worldwide average radon concentration is about 40 Bq/m3 [1], and because regulations require most hospital rooms to have high ventilation rates, the absolute reduction in radon concentration can be high.
Thus, the geometric mean is generally used for estimating the "average" radon concentration in an area.
Among them is the need to have estimates (preferably direct) of the annual average radon concentrations, which can be directly compared to the recommended reference levels.
The highest average radon concentrations in the United States are found in Iowa and in the Appalachian Mountain areas in southeastern Pennsylvania.
Iowa has the highest average radon concentrations in the United States due to significant glaciation that ground the granitic rocks from the Canadian Shield and deposited it as soils making up the rich Iowa farmland.
These include flat dwelling (which gives lower average radon concentrations) and double glazing (which gives higher concentrations).
We measured radon (222Rn) concentrations in Iowa and Minnesota and found that unusually high annual average radon concentrations occur outdoors in portions of central North America.
