Forensic evidence record · ev-ca3610050-f-upland-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

5.5 ng/LReported measurement

Back to water-system profile

5.5 ng/Lreported result

Not verified from sourcereporting limit

Sample date: 2024-04-01 to 2025-01-14sample date

2026-01-15publication date

Source observations (33)

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 380-89447-1 · Method EPA 533
PFHxA — Sample date: 2024-07-11
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 380-103735-1 · Method EPA 533
PFHxA — Sample date: 2024-10-07
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 380-116455-1 · Method EPA 533
PFHxA — Sample date: 2024-04-17
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 380-91886-1 · Method EPA 533
PFHxA — Sample date: 2024-07-11
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 380-103735-2 · Method EPA 533
PFHxA — Sample date: 2024-10-07
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 380-116455-2 · Method EPA 533
PFHxA — Sample date: 2025-01-14
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 380-130208-1 · 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 380-89447-3 · Method EPA 533
PFHxA — Sample date: 2024-07-11
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 380-103735-3 · Method EPA 533
PFHxA — Sample date: 2024-10-07
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 380-116455-3 · Method EPA 533
PFHxA — Sample date: 2025-01-14
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 380-130208-2 · 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 380-89447-4 · Method EPA 533
PFHxA — Sample date: 2024-07-11
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 380-103735-4 · Method EPA 533
PFHxA — Sample date: 2024-10-07
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 380-116455-4 · Method EPA 533
PFHxA — Sample date: 2025-01-14
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 380-130208-3 · 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 380-89455-1 · Method EPA 533
PFHxA — Sample date: 2024-10-07
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 380-116455-8 · 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 380-89447-5 · Method EPA 533
PFHxA — Sample date: 2024-07-11
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 380-103735-5 · Method EPA 533
PFHxA — Sample date: 2024-10-07
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 380-116455-5 · Method EPA 533
PFHxA — Sample date: 2025-01-14
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 380-130208-4 · 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 380-89447-6 · Method EPA 533
PFHxA — Sample date: 2024-07-11
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 380-103735-6 · Method EPA 533
PFHxA — Sample date: 2024-10-07
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 380-116455-6 · Method EPA 533
PFHxA — Sample date: 2025-01-14
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 380-130208-5 · 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 380-89447-7 · Method EPA 533
PFHxA — Sample date: 2024-07-11
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 380-103735-7 · Method EPA 533
PFHxA — Sample date: 2024-10-07
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 380-116455-7 · Method EPA 533
PFHxA — Sample date: 2025-01-14
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 380-130208-6 · 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 380-89455-2 · Method EPA 533
PFHxA — Sample date: 2024-10-07
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 380-116455-9 · Method EPA 533
PFHxA — Sample date: 2024-04-17
Detected above reporting limit. = 0.0055 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 380-91886-2 · Method EPA 533
PFHxA — Sample date: 2024-10-07
Detected above reporting limit. = 0.0052 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 380-116455-10 · 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: CA3610050
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.

Open source profile →Original record

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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