Forensic evidence record · ev-sc3210001-f-lexington-genx
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
A single published measurement record with its qualifier, sampling context, source identifier, method note, and stated limitations kept together.
Published evidence record
9.1 ng/LReported measurementSource observations (4)
- HFPO-DA — Sample date: 2023-07-18
Detected above reporting limit. = 0.0064 µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-70300-1 · Method EPA 533
- HFPO-DA — Sample date: 2023-10-23
Detected above reporting limit. = 0.0066 µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-82542-1 · Method EPA 533
- HFPO-DA — Sample date: 2024-01-22
Detected above reporting limit. = 0.0065 µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-91249-1 · Method EPA 533
- HFPO-DA — Sample date: 2024-04-15
Detected above reporting limit. = 0.0091 µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-100835-1 · Method EPA 533
Measurement evidence
- Analyte
- Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
- Result qualifier
- =
- Reference basis
- 10.0 ng/L federal MCL (2024)
- Sampling location
- Entry Point to Distribution
- Water system ID
- SC3210001
- Source ID
- src-ucmr5-2024
Laboratory context
No laboratory method note was published with this record.
Sampling context
This result represents a entry point to distribution sample. It does not establish the condition at every distribution point or household tap.
Record limitation
System-level entry-point monitoring; not a measurement of the water at an individual household tap.
Source provenance
UCMR5 Analytical Results
Fifth Unregulated Contaminant Monitoring Rule (UCMR5) — PFAS occurrence data
U.S. Environmental Protection Agency · Published 2024
Nationwide entry-point monitoring for 29 PFAS and lithium under the fifth UCMR cycle. Results are entry-point-to-distribution samples, not household-tap measurements.
How to interpret this record
This page preserves one measurement. Interpretation requires its qualifier, reporting limit, reference basis, date, sampling location, and limitations; the number alone is not a safety verdict.
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