Forensic evidence record · ev-co0118040-f-parker-wsd-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
11.9 ng/LReported measurementSource observations (26)
- PFHxA — Sample date: 2024-09-26
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 810-122048-1 · 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 810-141316-1 · Method EPA 533
- PFHxA — Sample date: 2024-09-30
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 810-122250-1 · Method EPA 533
- PFHxA — Sample date: 2025-03-25
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 810-142553-1 · Method EPA 533
- PFHxA — Sample date: 2024-10-02
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 810-122925-1 · Method EPA 533
- PFHxA — Sample date: 2025-04-15
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 810-145104-1 · Method EPA 533
- PFHxA — Sample date: 2024-09-04
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 810-118962-1 · Method EPA 533
- PFHxA — Sample date: 2025-03-19
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 810-142037-1 · Method EPA 533
- PFHxA — Sample date: 2024-10-02
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 810-122926-1 · Method EPA 533
- PFHxA — Sample date: 2025-04-23
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 810-146119-1 · Method EPA 533
- PFHxA — Sample date: 2024-10-02
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 810-122928-1 · Method EPA 533
- PFHxA — Sample date: 2025-04-02
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 810-143386-1 · Method EPA 533
- PFHxA — Sample date: 2024-10-02
Detected above reporting limit. = 0.0109 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-122930-1 · Method EPA 533
- PFHxA — Sample date: 2025-01-22
Detected above reporting limit. = 0.0103 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-135336-1 · Method EPA 533
- PFHxA — Sample date: 2025-04-02
Detected above reporting limit. = 0.0119 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-143383-1 · Method EPA 533
- PFHxA — Sample date: 2025-07-01
Detected above reporting limit. = 0.0089 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-154175-1 · Method EPA 533
- PFHxA — Sample date: 2024-04-01
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 810-98955-1 · Method EPA 533
- PFHxA — Sample date: 2024-10-02
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 810-122962-1 · Method EPA 533
- PFHxA — Sample date: 2024-10-02
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 810-122965-1 · Method EPA 533
- PFHxA — Sample date: 2025-01-22
Detected above reporting limit. = 0.0058 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-135329-1 · Method EPA 533
- PFHxA — Sample date: 2025-04-02
Detected above reporting limit. = 0.011 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-143384-1 · Method EPA 533
- PFHxA — Sample date: 2025-07-01
Detected above reporting limit. = 0.0051 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-154186-1 · Method EPA 533
- PFHxA — Sample date: 2024-09-26
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 810-122043-1 · Method EPA 533
- PFHxA — Sample date: 2025-04-15
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 810-145106-1 · Method EPA 533
- PFHxA — Sample date: 2024-09-18
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 810-120793-1 · Method EPA 533
- PFHxA — Sample date: 2025-03-10
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 810-140934-1 · 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
- CO0118040
- 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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