Forensic evidence record · ev-ca4010007-f-paso-robles-pfhpa
Perfluoroheptanoic acid (PFHpA)
A single published measurement record with its qualifier, sampling context, source identifier, method note, and stated limitations kept together.
Published evidence record
6.3 ng/LReported measurementSource observations (26)
- PFHpA — Sample date: 2024-12-04
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 AHL0862-05 · Method EPA 533
- PFHpA — Sample date: 2025-06-05
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 AIF0739-07 · Method EPA 533
- PFHpA — Sample date: 2024-12-12
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 AHL2112-05 · Method EPA 533
- PFHpA — Sample date: 2025-06-18
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 AIF2456-09 · Method EPA 533
- PFHpA — Sample date: 2024-12-12
Detected above reporting limit. = 0.0063 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample AHL2112-01 · Method EPA 533
- PFHpA — Sample date: 2025-06-18
Detected above reporting limit. = 0.0047 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample AIF2456-03 · Method EPA 533
- PFHpA — Sample date: 2024-12-04
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 AHL0862-07 · Method EPA 533
- PFHpA — Sample date: 2025-06-18
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 AIF2456-05 · Method EPA 533
- PFHpA — Sample date: 2024-12-18
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 AHL3041-01 · Method EPA 533
- PFHpA — Sample date: 2025-06-05
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 AIF0739-01 · Method EPA 533
- PFHpA — Sample date: 2024-12-18
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 AHL3041-03 · Method EPA 533
- PFHpA — Sample date: 2025-06-18
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 AIF2456-01 · Method EPA 533
- PFHpA — Sample date: 2024-12-12
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 AHL2112-03 · Method EPA 533
- PFHpA — Sample date: 2025-06-18
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 AIF2456-07 · Method EPA 533
- PFHpA — Sample date: 2024-12-04
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 AHL0862-03 · Method EPA 533
- PFHpA — Sample date: 2025-06-05
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 AIF0739-03 · Method EPA 533
- PFHpA — Sample date: 2024-12-04
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 AHL0862-01 · Method EPA 533
- PFHpA — Sample date: 2025-06-05
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 AIF0739-05 · Method EPA 533
- PFHpA — Sample date: 2025-04-23
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 AID3251-03 · Method EPA 533
- PFHpA — Sample date: 2025-10-02
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 AIJ0366-01 · Method EPA 533
- PFHpA — Sample date: 2024-12-18
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 AHL3041-05 · Method EPA 533
- PFHpA — Sample date: 2025-03-13
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 AIC2242-01 · Method EPA 533
- PFHpA — Sample date: 2025-06-18
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 AIF2456-11 · Method EPA 533
- PFHpA — Sample date: 2025-09-11
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 AII1538-01 · Method EPA 533
- PFHpA — Sample date: 2025-04-23
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 AID3251-01 · Method EPA 533
- PFHpA — Sample date: 2025-10-02
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 AIJ0366-03 · Method EPA 533
Measurement evidence
- Analyte
- Perfluoroheptanoic acid (PFHpA)
- Result qualifier
- =
- Reference basis
- No federal or state limit; shown for transparency
- Sampling location
- Entry Point to Distribution
- Water system ID
- CA4010007
- 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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