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Forensic evidence record · ev-ma4020002-f-centerville-osterville-marstons-mills-wd-pfhxs

Perfluorohexanesulfonic acid (PFHxS)

A single published measurement record with its qualifier, sampling context, source identifier, method note, and stated limitations kept together.

Published evidence record

3.1 ng/LReported measurement
Back to water-system profile
3.1 ng/Lreported result
Not verified from sourcereporting limit
Sample date: 2025-02-12 to 2025-10-01sample date
2026-10-15publication date
Source observations (30)
  • PFHxS — Sample date: 2025-02-19

    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 M5A0748-01 · Method EPA 533

  • PFHxS — Sample date: 2025-08-11

    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 M5G0890-01 · Method EPA 533

  • PFHxS — Sample date: 2025-02-12

    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 M5A0748-03 · Method EPA 533

  • PFHxS — Sample date: 2025-08-11

    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 M5G0890-03 · Method EPA 533

  • PFHxS — Sample date: 2025-02-13

    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 M5A0748-05 · Method EPA 533

  • PFHxS — Sample date: 2025-08-18

    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 M5G0890-05 · Method EPA 533

  • PFHxS — Sample date: 2025-02-12

    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 M5A0748-07 · Method EPA 533

  • PFHxS — Sample date: 2025-08-25

    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 M5G0890-07 · Method EPA 533

  • PFHxS — Sample date: 2025-02-19

    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 M5A0748-09 · Method EPA 533

  • PFHxS — Sample date: 2025-08-11

    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 M5G0890-09 · Method EPA 533

  • PFHxS — Sample date: 2025-05-01

    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 M5E0224-01 · Method EPA 533

  • PFHxS — Sample date: 2025-10-01

    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 M5J0244-01 · Method EPA 533

  • PFHxS — Sample date: 2025-05-01

    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 M5E0224-03 · Method EPA 533

  • PFHxS — Sample date: 2025-10-01

    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 M5J0244-03 · Method EPA 533

  • PFHxS — Sample date: 2025-02-12

    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 M5A0748-15 · Method EPA 533

  • PFHxS — Sample date: 2025-08-20

    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 M5G0890-15 · Method EPA 533

  • PFHxS — Sample date: 2025-02-13

    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 M5A0748-17 · Method EPA 533

  • PFHxS — Sample date: 2025-08-18

    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 M5G0890-17 · Method EPA 533

  • PFHxS — Sample date: 2025-02-13

    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 M5A0748-19 · Method EPA 533

  • PFHxS — Sample date: 2025-08-20

    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 M5G0890-19 · Method EPA 533

  • PFHxS — Sample date: 2025-02-20

    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 M5A0748-21 · Method EPA 533

  • PFHxS — Sample date: 2025-08-18

    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 M5G0890-21 · Method EPA 533

  • PFHxS — Sample date: 2025-05-21

    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 M5E1509-01 · Method EPA 533

  • PFHxS — Sample date: 2025-10-01

    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 M5J0244-05 · Method EPA 533

  • PFHxS — Sample date: 2025-02-19

    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 M5A0748-25 · Method EPA 533

  • PFHxS — Sample date: 2025-08-11

    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 M5G0890-25 · Method EPA 533

  • PFHxS — Sample date: 2025-02-19

    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 M5A0748-27 · Method EPA 533

  • PFHxS — Sample date: 2025-08-11

    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 M5G0890-27 · Method EPA 533

  • PFHxS — Sample date: 2025-02-12

    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 M5A0748-29 · Method EPA 533

  • PFHxS — Sample date: 2025-08-11

    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 M5G0890-29 · Method EPA 533

Measurement evidence

Analyte
Perfluorohexanesulfonic acid (PFHxS)
Result qualifier
=
Reference basis
10.0 ng/L federal MCL (2024)
Sampling location
Entry Point to Distribution
Water system ID
MA4020002
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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