Finding F-0655

“67% of the evaluated buildings have radon concentrations below the maximum value of 300 Bq.m-3 suggested by Portuguese regulation.”

On the relation of geology, natural ventilation and indoor radon concentration: the northern Portugal case study (2020). Page 10. CKB 0420

Structure

Factor: Radon
Population: building occupants
Setting: public building, PT
Study design: monitoring of indoor radon with thermo-hygrometric measurements in public buildings of northern Portugal (granitic geology), relating natural ventilation and occupancy to radon levels (class 4)
Effect: share-below 67

A Finding records what one published document states, verbatim and with its page. It is not a conclusion of Coridum; see the Claims that build on it.