Forensic evidence record · ev-al0000314-f-colbert-county-rural-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

29.5 ng/LReported measurement

Back to water-system profile

29.5 ng/Lreported result

Not verified from sourcereporting limit

Sample date: 2023-07-25 to 2024-05-14sample date

2026-01-15publication date

Source observations (26)

PFOS — Sample date: 2023-07-25
Detected above reporting limit. = 0.0149 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-71482-1 · Method EPA 533
PFOS — Sample date: 2023-10-11
Detected above reporting limit. = 0.0137 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-81239-1 · Method EPA 533
PFOS — Sample date: 2024-01-23
Detected above reporting limit. = 0.0128 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-91623-1 · Method EPA 533
PFOS — Sample date: 2024-05-14
Detected above reporting limit. = 0.0279 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-104950-1 · Method EPA 533
PFOS — Sample date: 2023-07-25
Detected above reporting limit. = 0.0059 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-71483-1 · Method EPA 533
PFOS — Sample date: 2023-10-11
Detected above reporting limit. = 0.0068 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-81292-1 · Method EPA 533
PFOS — Sample date: 2024-01-23
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 810-91610-1 · Method EPA 533
PFOS — Sample date: 2024-05-14
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 810-104953-1 · Method EPA 533
PFOS — Sample date: 2023-07-25
Detected above reporting limit. = 0.017 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-71484-1 · Method EPA 533
PFOS — Sample date: 2023-10-11
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 810-81287-1 · Method EPA 533
PFOS — Sample date: 2024-01-23
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 810-91647-1 · Method EPA 533
PFOS — Sample date: 2024-04-09
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 810-100220-1 · Method EPA 533
PFOS — Sample date: 2023-07-25
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 810-71478-1 · Method EPA 533
PFOS — Sample date: 2024-01-23
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 810-91600-1 · Method EPA 533
PFOS — Sample date: 2023-07-25
Detected above reporting limit. = 0.0143 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-71481-1 · Method EPA 533
PFOS — Sample date: 2023-10-11
Detected above reporting limit. = 0.0135 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-81235-1 · Method EPA 533
PFOS — Sample date: 2024-01-23
Detected above reporting limit. = 0.0157 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-91605-1 · Method EPA 533
PFOS — Sample date: 2024-05-14
Detected above reporting limit. = 0.0295 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-104957-1 · Method EPA 533
PFOS — Sample date: 2023-07-25
Detected above reporting limit. = 0.0195 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-71479-1 · Method EPA 533
PFOS — Sample date: 2023-10-11
Detected above reporting limit. = 0.0133 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-81288-1 · Method EPA 533
PFOS — Sample date: 2024-01-23
Detected above reporting limit. = 0.013 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-91641-1 · Method EPA 533
PFOS — Sample date: 2024-05-14
Detected above reporting limit. = 0.0265 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-104955-1 · Method EPA 533
PFOS — Sample date: 2023-07-25
Detected above reporting limit. = 0.0073 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-71480-1 · Method EPA 533
PFOS — Sample date: 2023-10-11
Detected above reporting limit. = 0.0102 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-81291-1 · Method EPA 533
PFOS — Sample date: 2024-01-23
Detected above reporting limit. = 0.0093 µg/L
Reporting limit: 0.004 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 810-91614-1 · Method EPA 533
PFOS — Sample date: 2024-05-14
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 810-104958-1 · 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: AL0000314
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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