Summary
Household tap-water samples in Southeast Los Angeles. Detected concentration ranges are reported separately from sampling counts and regulatory comparisons.
Key numbers
Source-reported values checked against the cited page of the filed PDF. Values are reported as printed, without conversion. These are selected records, not an exhaustive transcription.
| analyte | value | unit | basis | source location | limits and qualifiers |
|---|---|---|---|---|---|
| PFOA | 6.8-13.6 | ng/L | range among detections in household tap-water samples | PDF p17, Table 2; p10 Results | Method detection limit range 0.1 to 50.4 ng/L, PDF p8; this is a panel range, not an analyte-specific threshold. Estimated values below LOQ have an E qualifier in unstaged Supplemental Table 3. |
| PFOS | 9.4-17.8 | ng/L | range among detections in household tap-water samples | PDF p17, Table 2; p10 Results | Method detection limit range 0.1 to 50.4 ng/L, PDF p8; this is a panel range, not an analyte-specific threshold. Estimated values below LOQ have an E qualifier in unstaged Supplemental Table 3. |
Evidence Fitness
Source classification: primary_measurement. MANIFEST tier: PRIMARY. This is a selected, bounded transcription, not an exhaustive extraction of every result in the paper. Each selected number has its own PDF page or table locator. Values for different matrices, isomers, statistics and aggregate assays are not interchangeable.
Methods (brief)
Direct aqueous injection LC/MS/MS with isotope-dilution quantification, PDF p8 Methods. Target list in unstaged Supplemental Table 1.
Detection limits and censoring: Method detection limit range 0.1 to 50.4 ng/L, PDF p8; this is a panel range, not an analyte-specific threshold. Estimated values below LOQ have an E qualifier in unstaged Supplemental Table 3.
Limitations
Provenance notes
Citation metadata verified against PDF p1, deposited repository citation, year and DOI; PDF p2, article title and full author byline.. Article DOI appears in the supplied PDF and matches the MANIFEST case-insensitively. Original file: 2024_VonBehren_per-and-polyfluoroalkyl-substances-pfas-in.pdf. SHA-256: 002454c61a31182e3ac7d390f15772f93bbff2076711949c06bafadb26211001. Original MANIFEST remains in the copied packet; discrepancies are listed without modifying it. Commercial analyte synonyms, instrument brands and manufacturer names are generalized in authored index prose.