Country

Water source

Activity concentration (Bq∙L^-1)

Reference

²²⁶Ra

²³²Th

⁴⁰K

Saudi Arabia

Drinking water

1.94 - 0.434

(0.28)

0.023 - 0.186

(0.085)

1.43 - 12.19

(5.24)

Present work

Saudi Arabia

Bottled drinking water

0.21 - 2.25

(0.77)

0.37 - 0.232

(1.3)

0.24 - 33.74

(11.1)

(Al-Ghamdi, 2014)

Saudi Arabia

Drinking water

0.105 - 0.568

(0.32)

0.016 - 0.382

(0.12)

2.16 - 18.84

(10.96)

(Al-Zahrani, 2016)

Turkey

Bottled drinking water

0.517 - 1.22

(0.78)

0.232 - 1.87

(1.05)

1.54 - 2.57

(2.19)

(Kabadayi & Gümüş, 2011)

Malaysia

Bottled mineral water

0.41 - 0.56

(0.46)

0.34 - 0.99

(0.54)

2.88 - 7.65

(4.05)

(Priharti et al., 2015)

Pakistan

Drinking water

1.09

0.55

16.17

(Mashiatullah et al., 2016)

Malaysia

Bottled mineral water

1.45 - 3.30

0.65 - 3.39

21.12 - 25.31

(Khandaker et al., 2017)

Egypt (Assiut city)

Drinking water

0.019 - 0.492

(0.203)

0.015 - 0. 351

(0.081)

0.050 - 2.255

(0.688)

(El-Gamal et al., 2019)

Iran

Drinking water

(0.57)

(0.98)

(6.42)

(Parhoudeh et al., 2019)