Forensic evidence record · ev-ct0770021-f-manchester-pfos

Perfluorooctanesulfonic acid (PFOS)

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

Published evidence record

16 ng/LReported measurement

Back to water-system profile

16 ng/Lreported result

Not verified from sourcereporting limit

Sample date: 2023-10-17 to 2024-07-23sample date

2026-01-15publication date

Source observations (24)

PFOS — Sample date: 2023-10-17
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35835875001SE1 · Method EPA 533
PFOS — Sample date: 2024-01-24
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35856427001SE2 · Method EPA 533
PFOS — Sample date: 2024-04-24
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35875612001SE3 · Method EPA 533
PFOS — Sample date: 2024-07-22
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35894139001SE4 · Method EPA 533
PFOS — Sample date: 2023-10-17
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35835875003SE1 · Method EPA 533
PFOS — Sample date: 2024-01-24
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35856427003SE2 · Method EPA 533
PFOS — Sample date: 2024-04-23
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35875612003SE3 · Method EPA 533
PFOS — Sample date: 2024-07-22
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35894139003SE4 · Method EPA 533
PFOS — Sample date: 2023-10-17
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35835875005SE1 · Method EPA 533
PFOS — Sample date: 2024-01-24
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35856427005SE2 · Method EPA 533
PFOS — Sample date: 2024-04-23
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35875612005SE3 · Method EPA 533
PFOS — Sample date: 2024-07-22
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35894139005SE4 · Method EPA 533
PFOS — Sample date: 2023-10-17
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35835875007SE1 · Method EPA 533
PFOS — Sample date: 2024-04-24
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35875626001SE2 · Method EPA 533
PFOS — Sample date: 2023-10-17
Detected above reporting limit. = 0.016 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35835875009SE1 · Method EPA 533
PFOS — Sample date: 2024-04-23
Detected above reporting limit. = 0.016 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35875626003SE2 · Method EPA 533
PFOS — Sample date: 2023-10-17
Detected above reporting limit. = 0.0061 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35835875011SE1 · Method EPA 533
PFOS — Sample date: 2024-01-24
Detected above reporting limit. = 0.006 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35856427007SE2 · Method EPA 533
PFOS — Sample date: 2024-04-23
Detected above reporting limit. = 0.0075 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35875612007SE3 · Method EPA 533
PFOS — Sample date: 2024-07-22
Detected above reporting limit. = 0.0061 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35894139007SE4 · Method EPA 533
PFOS — Sample date: 2024-02-21
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35862488001SE1 · Method EPA 533
PFOS — Sample date: 2024-01-24
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35856427009SE2 · Method EPA 533
PFOS — Sample date: 2024-04-24
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35875612009SE3 · Method EPA 533
PFOS — Sample date: 2024-07-23
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 35894139009SE4 · Method EPA 533

Measurement evidence

Analyte: Perfluorooctanesulfonic acid (PFOS)
Result qualifier: =
Reference basis: 4.0 ng/L federal MCL (2024)
Sampling location: Entry Point to Distribution
Water system ID: CT0770021
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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