²³²Th (Bq/kg)

²²⁶Ra (Bq/kg)

²¹⁰Pb (Bq/kg)

⁴⁰K (Bq/kg)

Dose Rate

(µSv·h⁻¹)

Median

56

24

27

96

0.10

Minimum

16

0.7

13

62.5

0.05

Maximum

256

83

81

294

0.13

25^th percentile

32

14

23

82

0.09

75^th percentile

89

40

43

108

0.11

Mean

69.4

28.8

34.2

108.8

0.1