Table 1 Levels of PFOA and PFOS in water in Japan and several other countries

River

 Hokkaido

0.4

1.9

[17]

 Tohoku

1.1 (2.7)

0.1–4.2

1.2 (2.5)

0.3–4.6

[17]

 Kanto

2.8 (3.6)

0.3–15.1

3.7 (3.9)

0.3–31.4

[17]

 Kanto (Tsurumi River)

11.2–19.8

17.1–612

[22]

 Chubu

2.5 (2.2)

0.3–16.3

1.1 (2.4)

0.3–6.0

[17]

 Kansai

21.2 (6.2)

2.1–456.4

5.7 (3.6)

0.8–37.3

[17]

 Kansai (Kanzaki River)

4.5–67,000

1.5–526

[17]

 Kansai (Yodo River)

60.5 (4.0)

6–2568

7.1 (4.2)

0.8–123

[21]

 Chugoku

1.5 (2.3)

0.5–8.1

1.0 (3.4)

0.4–25.1

[17]

 Shikoku

3.0 (2.1)

1.4–13.8

1.1 (4.7)

0.2–14.9

[17]

 Kyushu

1.3 (2.4)

0.2–3.3

0.7 (1.9)

0.3–1.7

[17]

Coastal water

 Hokkaido

1.9

2.1

[17]

 Hokkaido

<2.5

[20]

 Tohoku

2.0 (1.1)

2.1–2.1

1.0 (1.9)

0.6–0.9

[17]

 Kanto (Funabashi)

32.2

2.6

[17]

 Kanto

26

8–59

[20]

 Kanto

166 (1.1)

154–192

20.1 (1.5)

12.7–25.4

[23]

 Chubu (Toyohashi)

11.5

0.7

[17]

 Kansai (Koshien Hama)

448

27.69

[17]

 Kansai

8.7

<4–21

[20]

 Chugoku

<4

[17]

 Kyushu

4.8

<9–11

[20]

 Okinawa

<2.5

[20]

Tap water

 Tohoku

0.3 (2.3)

0.01–1.0

0.2 (1.7)

0.1–0.5

[17]

 Kanto (Tokyo)

<5

<5–25

6.4

<5–37

[29]

 Kansai

15.3 (2.3)

4.9–42.2

3.8 (3.6)

0.3–12.7

[17]

 Kansai (Osaka)

31

7.9–110

3.8

0.3–20

[28]

River

 Tennessee, USA

366 (1.5)

140–498

55.1 (2.0)

16.8–144

[24]

 Etobicoke Creek, Canada

11–1.1 × 10⁴

ND-2.2 × 10⁶

[25]

 Cape Fear Drainage Basin, USA

16.2

<0.05–287

20.0

<0.05–132

[26]

 Rhine River, Germany

4.9 (2.9)

2–48

6.5 (1.9)

2–26

[27]

 Ruhr River, Germany

102 (5.0)

9–3640

11.7 (2.7)

4–193

[27]