Country

Average activity concentration (Bq/kg)

References

226R

232Th

40K

Saudi Arabia

35

31.57

843.63

Present work

Saudi(South of Al-Madina)

106.4

110.35

2683

[12]

Egypt

28.4

37.4

1167

[11]

Yemen (Aden)

57.086

80.26

846.21

[7]

Yemen(Sana’a,)

26.6

23.2

515.6

[9]

Italy

15 - 164

16 - 174

201 - 1350

[21]

India

41.08

86.26

869.29

[4]

Brazil

24

37

1173

[22]

Turkey

12.01 - 48.95

8.2 - 53.27

143.97 - 452.34

45444445452.34

[23]