Forensic evidence record · ev-ia9778054-f-sioux-city-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
4.8 ng/LReported measurementSource observations (8)
- PFHpA — Sample date: 2023-10-16
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 2351455 · Method EPA 533
- PFHpA — Sample date: 2024-02-13
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 2396995 · Method EPA 533
- PFHpA — Sample date: 2024-04-16
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 2423752 · Method EPA 533
- PFHpA — Sample date: 2024-07-15
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 2465016 · Method EPA 533
- PFHpA — Sample date: 2023-10-16
Detected above reporting limit. = 0.0032 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 2351528 · Method EPA 533
- PFHpA — Sample date: 2024-01-16
Detected above reporting limit. = 0.0048 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 2385772 · Method EPA 533
- PFHpA — Sample date: 2024-04-16
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 2423885 · Method EPA 533
- PFHpA — Sample date: 2024-07-15
Detected above reporting limit. = 0.0043 µg/L
Reporting limit: 0.003 µg/L. Detection limit: Not available. Benchmark unavailable
Source: src-ucmr5-2024 · UCMR5_All.txt · Sample 2464982 · 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
- IA9778054
- 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.
Review finding states →