Forensic evidence record · ev-ca1910194-f-rowland-district-pfba
Perfluorobutanoic acid (PFBA)
A single published measurement record with its qualifier, sampling context, source identifier, method note, and stated limitations kept together.
Published evidence record
10 ng/LReported measurementSource observations (14)
- PFBA — Sample date: 2023-02-15
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample C3B2173-01 · Method EPA 533
- PFBA — Sample date: 2023-05-18
Detected above reporting limit. = 0.01 µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample C3E2608-01 · Method EPA 533
- PFBA — Sample date: 2023-08-17
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample C3H2710-01 · Method EPA 533
- PFBA — Sample date: 2023-11-15
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample C3K2012-01 · Method EPA 533
- PFBA — Sample date: 2023-02-15
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample C3B2173-03 · Method EPA 533
- PFBA — Sample date: 2023-05-18
Detected above reporting limit. = 0.0056 µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample C3E2608-03 · Method EPA 533
- PFBA — Sample date: 2023-08-17
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample C3H2710-03 · Method EPA 533
- PFBA — Sample date: 2023-11-15
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample C3K2012-03 · Method EPA 533
- PFBA — Sample date: 2023-02-15
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample C3B2173-05 · Method EPA 533
- PFBA — Sample date: 2023-05-18
Detected above reporting limit. = 0.0071 µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample C3E2608-05 · Method EPA 533
- PFBA — Sample date: 2023-08-17
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample C3H2710-05 · Method EPA 533
- PFBA — Sample date: 2023-11-15
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample C3K2012-05 · Method EPA 533
- PFBA — Sample date: 2023-02-15
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample C3B2173-07 · Method EPA 533
- PFBA — Sample date: 2023-08-17
Below reporting limit. < Result value not available µg/L
Reporting limit: 0.005 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample C3H2710-07 · Method EPA 533
Measurement evidence
- Analyte
- Perfluorobutanoic acid (PFBA)
- Result qualifier
- =
- Reference basis
- No federal or state limit; shown for transparency
- Sampling location
- Entry Point to Distribution
- Water system ID
- CA1910194
- 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.
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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