From the page · 22 passages with claims
by New Jersey Institute of Technology (Unverified, claim 2)
edited by Sadie Harley, reviewed by Andrew Zinin (Not auto-checked, claim 3)
"Most people have heard of perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) because they have been the focus of regulations and water testing for years. (Unverified, claim 11) TFA is different," said Siwei Gu, a postdoctoral researcher in NJIT's Emerging Contaminants Research Laboratory and lead author of the study.
To investigate these often-overlooked compounds, researchers analyzed 113 samples, including 70 tap-water samples from across New Jersey and 43 commercially available bottled beverages. (Unverified, claim 16) Using a specialized laboratory method, they screened for five ultra-short-chain PFAS that can be difficult to measure through conventional testing procedures. (Unverified, claim 17)
TFA was by far the most frequently detected compound, appearing in 64 of 70 tap-water samples and 34 of 43 bottled beverages. (Unverified, claim 18) Although concentrations varied geographically, at least one tap-water sample from every New Jersey county contained detectable TFA. (Unverified, claim 19)
Among the 43 bottled beverages tested, the 12 formulated beverages had an average TFA concentration approximately 52 times higher than the 31 bottled waters. (Unverified, claim 24) Concentrations in some electrolyte waters and sports drinks were particularly elevated, with the highest measurement reaching 94,100 nanograms per liter. (Unverified, claim 25) By comparison, the highest TFA concentration detected in New Jersey tap water was 1,360 nanograms per liter. (Unverified, claim 26)
Researchers have not determined why some formulated beverages contained substantially higher concentrations. (Unverified, claim 27) Unlike plain bottled water, these products may include sweeteners, flavorings, electrolytes and other additives that could introduce additional sources of TFA. (Unverified, claim 28)
"One possible explanation is that ingredients used in these beverages or certain manufacturing processes may be contributing to the elevated TFA concentrations," Gu said. "However, we did not analyze individual ingredients or investigate the manufacturing processes, so we cannot definitively identify the sources of TFA in these products." (Unverified, claim 30)
TFA can enter the environment through multiple pathways, including the breakdown of certain fluorinated refrigerants, pesticides and other chemicals. (Unverified, claim 31) It can subsequently be transported through precipitation into surface water and drinking-water sources. (Unverified, claim 32) Its persistence and high mobility also make it challenging to remove through conventional water treatment. (Corroborated, claim 33)
The researchers emphasize that the study represents an initial snapshot of contamination rather than a comprehensive assessment of New Jersey's drinking-water systems. (Unverified, claim 34) Additional sampling will be needed to determine how concentrations vary over time and to identify the sources responsible for geographic differences.
The study also points to challenges facing water utilities and regulators. Conventional PFAS treatment technologies, including granular activated carbon and ion-exchange resins, are generally less effective at capturing TFA than many longer-chain PFAS compounds. (Corroborated, claim 35) Specialized testing methods are also needed to reliably measure these smaller contaminants. (Unverified, claim 36)
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- Corroborated backed by sources
- Contradicted contradicted by sources
- Unverified not confirmed or contradicted
- Not auto-checked evidence only, no automated status