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100 kBq m−3 Radon Activity Concentration in the Atmosphere of a Bathroom Supplied with Groundwater From A Gneissic Rock Area with Consanguineous Intrusions

Søstrand, Per; Sverre, Langård; Danielsen, Tor Erik

doi: 10.1097/HP.0000000000000568

Inhalation of escaping radon from groundwater comprises the largest part of radiological hazard from groundwater radionuclides in the uranium and thorium series. Groundwater containing 1.5 mg dm−3 uranium and 3 kBq dm−3 radon activity concentration supplied an ordinary bathroom of 15 m3 in a home. Using the showerhead, atmospheric levels of radon activity in the bathroom exceeded 100 kBq m−3 within a period of about 1 h.

*Occupational and Environmental Medicine, Oslo University Hospital, Norway.

The authors declare no conflicts of interest.

For correspondence contact: Per Søstrand, Occupational and Environmental Medicine, Oslo University Hospital, Norway, or email at

(Manuscript accepted 12 July 2016)

© 2016 by the Health Physics Society