Table 2.
PFAS concentrations in paired tap water and plasma samples in a subset of the Barcelona Life Study Cohort (BiSC) (n total = 105).
| Unfiltered tap water (n = 81) | Filtered tap water with AC (n = 14) | Filtered tap water with RO (n = 10) | Plasma (n = 98) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| LOQ (ng/L) | >LOQ n (%) | Median [min, max] (ng/L)a | >LOQ n (%) | Median [min, max] (ng/L)a | >LOQ n (%) | LOD (ng/mL) | >LOD n (%) | Median [min, max] (ng/mL)a | |
| Perfluoroalkyl carboxylates | |||||||||
| PFPeA (C5) | 1.0 | 62 (76.5) | 5.8 [1.4, 23.0] | 10 (71.4) | 4.7 [2.2, 8.2] | 0 | 0.02 | 0 | <LOD |
| PFHxA (C6) | 10 | 6 (7.4) | 12.0 [10.0, 16.0] | 0 | <LOQ | 0 | 0.02 | 0 | <LOD |
| PFHpA (C7) | 1.0 | 53 (65.4) | 3.4 [1.0, 9.10] | 8 (57.1) | 3.0 [1.0, 6.1] | 0 | 0.02 | 51 (52) | 0.03 [0.02, 0.1] |
| PFOA (C8) | 10 | 0 | <LOQ | 0 | <LOQ | 0 | 0.02 | 98 (100) | 0.6 [0.2, 1.8] |
| PFNA (C9) | 5.0 | 0 | <LOQ | 0 | <LOQ | 0 | 0.02 | 97 (99) | 0.2 [0.05, 0.6] |
| PFDA (C10) | 5.0 | 0 | <LOQ | 0 | <LOQ | 0 | 0.02 | 97 (99) | 0.1 [0.02, 0.4] |
| PFUnDA (C11) | 5.0 | 0 | <LOQ | 0 | <LOQ | 0 | 0.02 | 94 (95.9) | 0.2 [0.02, 0.5] |
| PFDoDA (C12) | 10 | 0 | <LOQ | 0 | <LOQ | 0 | 0.02 | 80 (81.6) | 0.03 [0.02, 0.1] |
| PFTrDA (C13) | 50 | 0 | <LOQ | 0 | <LOQ | 0 | 0.02 | 51 (52) | 0.03 [0.02, 0.2] |
| PFTeDA (C14) | NA | 0 | NA | NA | NA | NA | 0.07 | 1 (1.0) | 0.07 |
| Perfluoroalkyl sulfonates | |||||||||
| PFBS (C4) | 5.0 | 47 (58) | 8.3 [4.5, 15.0] | 4 (28.6) | 10.5 [5.9, 15.0] | 0 | 0.02 | 79 (80.6) | 0.1 [0.03, 1.9] |
| PFHxS (C6) | 10 | 0 | <LOQ | 0 | <LOQ | 0 | 0.02 | 98 (100) | 0.2 [0.06, 1.3] |
| PFHpS (C7) | 5.0 | 0 | <LOQ | 0 | <LOQ | 0 | 0.02 | 55 (56.1) | 0.04 [0.02, 0.09] |
| PFOS (C8) | 10 | 21 (25.9) | 13.0 [10.0, 28.0] | 3 (21.4) | 12.0 [11.0, 21.0] | 0 | 0.02 | 98 (100) | 1.7 [0.3, 5.9] |
| Perfluorosulfonamides | |||||||||
| PFOSA | 50 | 0 | <LOQ | 0 | <LOQ | 0 | 0.02 | 46 (46.9) | 0.02 [0.02, 0.04] |
| Ether-PFAS | |||||||||
| 6:2 Cl-PFESA | NA | NA | NA | NA | NA | NA | 0.003 | 85 (86.7) | 0.02 [0.004, 0.2] |
LOD limit of detection, LOQ limit of quantification.
aMedian values were calculated from samples >LOD/LOQ only.
NA denotes that the compound was not analyzed for the samples.