Forensic evidence record · ev-tx1010018-f-la-porte-pfhxa
Perfluorohexanoic acid (PFHxA)
A single published measurement record with its qualifier, sampling context, source identifier, method note, and stated limitations kept together.
Published evidence record
4.8 ng/LReported measurementSource observations (16)
- PFHxA — Sample date: 2024-05-21
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 1010018B · Method EPA 533
- PFHxA — Sample date: 2025-03-12
Detected at or below reporting limit. = 0.003 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 1010018BSE2RES · Method EPA 533
- PFHxA — Sample date: 2024-05-21
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 1010018F · Method EPA 533
- PFHxA — Sample date: 2024-11-19
Detected above reporting limit. = 0.0033 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 1010018FSE2 · Method EPA 533
- PFHxA — Sample date: 2024-05-21
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 1010018A · Method EPA 533
- PFHxA — Sample date: 2025-03-12
Detected above reporting limit. = 0.0031 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 1010018ASE2RES · Method EPA 533
- PFHxA — Sample date: 2024-06-27
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 1010018CRS · Method EPA 533
- PFHxA — Sample date: 2025-03-12
Detected at or below reporting limit. = 0.003 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 1010018CSE2RES · Method EPA 533
- PFHxA — Sample date: 2024-05-21
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 1010018D · Method EPA 533
- PFHxA — Sample date: 2024-11-19
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 1010018DSE2 · Method EPA 533
- PFHxA — Sample date: 2024-05-21
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 1010018E · Method EPA 533
- PFHxA — Sample date: 2025-03-12
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 1010018ESE2RES · Method EPA 533
- PFHxA — Sample date: 2024-05-21
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 1010018G · Method EPA 533
- PFHxA — Sample date: 2024-08-12
Detected above reporting limit. = 0.0033 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 1010018GSE2 · Method EPA 533
- PFHxA — Sample date: 2025-02-21
Detected above reporting limit. = 0.0046 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 1010018GSE3RES · Method EPA 533
- PFHxA — Sample date: 2025-02-13
Detected above reporting limit. = 0.0048 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 1010018GSE4 · Method EPA 533
Measurement evidence
- Analyte
- Perfluorohexanoic acid (PFHxA)
- Result qualifier
- =
- Reference basis
- 400000.0 ng/L Michigan EGLE state MCL (strictest US state)
- Sampling location
- Entry Point to Distribution
- Water system ID
- TX1010018
- 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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