Ultrashort PFAS dominate Dutch drinking water
Across 18 Dutch plants, TFA and other C2–C3 PFAS dominate raw and finished water (often 49–99% of 56-PFAS mass); conventional carbon treatments often fail them, unlike longer-chain PFAS.
Source
Occurrence, Fate, and Related Health Risks of PFAS in Raw and Produced Drinking Water
What they did
Authors grabbed triplicate raw and finished samples at 18 full-scale plants (surface and groundwater), quantified 56 PFAS including ultrashort acids and branched isomers, and compared sums to EFSA/DWD/RPF risk metrics and treatment type.
What they found
Sum of 56 PFAS was 50–1150 ng/L in raw surface water and 90–530 ng/L in groundwater. Ultrashort PFAS (mainly TFA 30–1100 ng/L) were 49–99% of mass and barely differed after treatment. PAC/GAC sometimes showed negative ultrashort ‘removal’ (breakthrough/desorption).
The limits
What it doesn't show
Anonymous plants and one March–April 2021 campaign cannot rank every Dutch source year-round; TFA toxicology for drinking water is still unsettled relative to PFOA/PFOS guidelines.
Key terms
- PFAS
- Per- and polyfluoroalkyl substances: highly persistent fluorinated organics.
- TFA
- Trifluoroacetic acid, an ultrashort C2 PFAS that dominated samples here.
- EFSA TWI
- 4.4 ng/kg-week for the sum of PFOA, PFNA, PFHxS, and PFOS.
- Negative removal
- Finished water higher than raw for some ultrashort PFAS, suggesting breakthrough or precursor breakdown.
- Reverse osmosis
- Size-exclusion treatment more likely than carbon sorption to control polar ultrashort PFAS.
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Quiz yourself
Mass-dominant PFAS in these Dutch waters:
Common questions
What dominated the 56-PFAS sum?
Ultrashort C2–C3 acids, mainly TFA.
Did treatment remove TFA well?
Generally no—raw vs finished ultrashort levels were similar; some carbon plants went negative.
How many plants?
18 full-scale Dutch production locations.
Surface vs groundwater sums?
Surface raw 50–1150 ng/L; groundwater 90–530 ng/L for 56 PFAS.
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