Table 2 Top ten suspects present in the collected samples

1

C₈HF₁₇O₃S

Perfluorooctanesulfonic acid

Medical imaging and implants, flame retardants, electronic devices, electrolyte additives in lithium-ion batteries, surfactants, lubricants, semiconductors, heat transfer applications, etc.

2

C₈HF₁₅O₂

Perfluorooctanoic acid

3

C₄HF₉O₃S

Perfluorobutanesulfonic acid

4

C₇H₄F₁₁IO

1,1,1,2-tetrafluoro-2-(1,1,2,2,3,3,3-heptafluoropropoxy)-4-iodobutane

5

C₁₈H₁₈F₂₄N₃O₆P₃

Hexakis(2,2,3,3-tetrafluoropropoxy)-phosphazene

6

C₈H₃F₁₅O₃

2,2-difluoro-2-[1,1,2,2-tetrafluoro-2-(1,1,2,2,3,3,4,4,4-nonafluorobutoxy) ethoxy] ethanol

7

C₅HF₁₁

1,1,1,2,2,3,3,4,4,5,5-undecafluoropentane

8

C₁₀H₂F₁₆O₄

Perfluorosebacic acid

9

C₇HF₁₅

1,1,1,2,2,3,3,4,4,5,5,6,6,7,7-pentadecafluoroheptane

10

C₁₀H₁₂F₈

1,1,1,2,2,3,3,4-octa fluoro-7,7-dimethyl oct-4-ene