Forensic evidence record · ev-pa1090089-f-northampton-bucks-mun-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

17.5 ng/LReported measurement

Back to water-system profile

17.5 ng/Lreported result

Not verified from sourcereporting limit

Sample date: 2024-12-11 to 2025-09-03sample date

2026-10-15publication date

Source observations (34)

PFHxA — Sample date: 2024-12-11
Detected above reporting limit. = 0.0067 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-131536-1 · Method EPA 533
PFHxA — Sample date: 2025-06-11
Detected above reporting limit. = 0.0049 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-151967-1 · Method EPA 533
PFHxA — Sample date: 2024-12-11
Detected above reporting limit. = 0.0118 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-131563-1 · Method EPA 533
PFHxA — Sample date: 2025-06-11
Detected above reporting limit. = 0.0175 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-151957-1 · Method EPA 533
PFHxA — Sample date: 2024-12-11
Detected above reporting limit. = 0.01 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-131550-1 · Method EPA 533
PFHxA — Sample date: 2025-06-11
Detected above reporting limit. = 0.0064 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-151952-1 · Method EPA 533
PFHxA — Sample date: 2024-12-11
Detected above reporting limit. = 0.0074 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-131553-1 · Method EPA 533
PFHxA — Sample date: 2025-06-11
Detected above reporting limit. = 0.0081 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-152097-1 · Method EPA 533
PFHxA — Sample date: 2024-12-11
Detected above reporting limit. = 0.004 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-131548-1 · Method EPA 533
PFHxA — Sample date: 2025-06-11
Detected above reporting limit. = 0.0041 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-151959-1 · Method EPA 533
PFHxA — Sample date: 2024-12-11
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 810-131535-1 · Method EPA 533
PFHxA — Sample date: 2025-06-11
Detected above reporting limit. = 0.0072 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-152094-1 · Method EPA 533
PFHxA — Sample date: 2024-12-11
Detected above reporting limit. = 0.0044 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-131546-1 · Method EPA 533
PFHxA — Sample date: 2025-06-11
Detected above reporting limit. = 0.0044 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-151950-1 · Method EPA 533
PFHxA — Sample date: 2024-12-19
Detected above reporting limit. = 0.0059 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-132610-1 · Method EPA 533
PFHxA — Sample date: 2025-06-11
Detected above reporting limit. = 0.0071 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-151964-1 · Method EPA 533
PFHxA — Sample date: 2024-12-11
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 810-131580-1 · Method EPA 533
PFHxA — Sample date: 2025-06-11
Detected above reporting limit. = 0.0161 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-152099-1 · Method EPA 533
PFHxA — Sample date: 2024-12-11
Detected above reporting limit. = 0.0069 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-131567-1 · Method EPA 533
PFHxA — Sample date: 2025-06-11
Detected above reporting limit. = 0.0068 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-151965-1 · Method EPA 533
PFHxA — Sample date: 2024-12-11
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 810-131572-1 · Method EPA 533
PFHxA — Sample date: 2025-06-11
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 810-151955-1 · Method EPA 533
PFHxA — Sample date: 2024-12-11
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 810-131537-1 · Method EPA 533
PFHxA — Sample date: 2025-06-11
Detected above reporting limit. = 0.0054 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-152092-1 · Method EPA 533
PFHxA — Sample date: 2024-12-11
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 810-131576-1 · Method EPA 533
PFHxA — Sample date: 2025-06-11
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 810-151961-1 · Method EPA 533
PFHxA — Sample date: 2024-12-11
Detected above reporting limit. = 0.0057 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-131554-1 · Method EPA 533
PFHxA — Sample date: 2025-06-11
Detected above reporting limit. = 0.0059 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-151963-1 · Method EPA 533
PFHxA — Sample date: 2024-12-11
Detected above reporting limit. = 0.0121 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-131539-1 · Method EPA 533
PFHxA — Sample date: 2025-06-11
Detected above reporting limit. = 0.0132 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-151956-1 · Method EPA 533
PFHxA — Sample date: 2024-12-11
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 810-131538-1 · 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 810-142107-1 · Method EPA 533
PFHxA — Sample date: 2025-06-23
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 810-153266-1 · Method EPA 533
PFHxA — Sample date: 2025-09-03
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 810-162510-1 · 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: PA1090089
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.

Review finding states →

Related intelligence

Water-system profile Data sources Methodology Evidence verification