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  • Title: Lung dose estimates from 222Rn in Arizona groundwater based on liquid scintillation measurements.
    Author: Barnett JM, Holbert KE, Stewart BD, Hood WK.
    Journal: Health Phys; 1995 May; 68(5):699-703. PubMed ID: 7730067.
    Abstract:
    Since August 1989, 222Rn groundwater samples from across the state of Arizona have been collected and analyzed using liquid scintillation. Of the 253 specimens acquired, 65% have 222Rn concentrations above 11 Bq L-1 (300 pCi L-1), while 16% have 222Rn activities over 37 Bq L-1 (1,000 pCi L-1). The geometric mean 222Rn concentration for all the wells tested is 13 Bq L-1 x divided by 4; the arithmetic mean is 37 +/- 122 Bq L-1. Using the geometric mean, it is estimated that an additional tracheobronchial lung dose equivalent of 0.19 mSv y-1 x divided by 13.9 is delivered to Arizona residents from the well water to home pathway.
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