DARDANELLE WATERWORKS
PWSID: AR0000601 · DARDANELLE, AR · Serving 4,514 people
Type: CWSOwner: LSource: GW
Exceeds MCL
One or more PFAS compounds exceed EPA Maximum Contaminant Levels. Corrective action required by 2031.
Key contaminants vs MCL
PFOS4.4 ppt(MCL: 4 ppt)
EPA MCL: 4 ppt (parts per trillion) for PFOA and PFOS individually. Compliance deadline: 2031-12-31
Detection summary
3
PFAS compounds detected
5.9 ppt
Highest single detection
2025-08-13
Latest sample date
partial
Data completeness
All PFAS detection results
Source: EPA UCMR5 (UCMR5)
| Contaminant | Result (ppt) | MCL (ppt) | Status | Sample date |
|---|---|---|---|---|
| 11Cl-PF3OUdS | ND | — | Below MRL | 2025-08-13 |
| PFHpA | ND | — | Below MRL | 2025-02-26 |
| PFNA | ND | 10 | Below MRL | 2025-02-26 |
| PFOS | ND | 4 | Below MRL | 2025-02-26 |
| PFOA | ND | 4 | Below MRL | 2025-02-26 |
| PFDA | ND | — | Below MRL | 2025-02-26 |
| PFDoA | ND | — | Below MRL | 2025-02-26 |
| PFHxA | ND | — | Below MRL | 2025-02-26 |
| PFUnA | ND | — | Below MRL | 2025-02-26 |
| 11Cl-PF3OUdS | ND | — | Below MRL | 2025-02-26 |
| 9Cl-PF3ONS | ND | — | Below MRL | 2025-02-26 |
| ADONA | ND | — | Below MRL | 2025-02-26 |
| HFPO-DA | ND | 10 | Below MRL | 2025-02-26 |
| PFBS | ND | — | Below MRL | 2025-02-26 |
| 6:2 FTS | ND | — | Below MRL | 2025-02-26 |
| PFHpS | ND | — | Below MRL | 2025-08-13 |
| HFPO-DA | ND | 10 | Below MRL | 2025-08-13 |
| lithium | ND | — | Below MRL | 2025-08-13 |
| 4:2 FTS | ND | — | Below MRL | 2025-02-26 |
| 8:2 FTS | ND | — | Below MRL | 2025-02-26 |
| PFMPA | ND | — | Below MRL | 2025-02-26 |
| PFPeA | ND | — | Below MRL | 2025-02-26 |
| PFMBA | ND | — | Below MRL | 2025-02-26 |
| PFEESA | ND | — | Below MRL | 2025-02-26 |
| NFDHA | ND | — | Below MRL | 2025-02-26 |
| PFPeS | ND | — | Below MRL | 2025-02-26 |
| PFHpS | ND | — | Below MRL | 2025-02-26 |
| lithium | ND | — | Below MRL | 2025-02-26 |
| PFTrDA | ND | — | Below MRL | 2025-02-26 |
| NEtFOSAA | ND | — | Below MRL | 2025-02-26 |
| NMeFOSAA | ND | — | Below MRL | 2025-02-26 |
| PFBA | ND | — | Below MRL | 2025-02-26 |
| PFTA | ND | — | Below MRL | 2025-02-26 |
| 4:2 FTS | ND | — | Below MRL | 2025-08-13 |
| PFBS | ND | — | Below MRL | 2025-08-13 |
| PFHpA | ND | — | Below MRL | 2025-08-13 |
| PFNA | ND | 10 | Below MRL | 2025-08-13 |
| PFOA | ND | 4 | Below MRL | 2025-08-13 |
| PFDA | ND | — | Below MRL | 2025-08-13 |
| PFDoA | ND | — | Below MRL | 2025-08-13 |
| PFUnA | ND | — | Below MRL | 2025-08-13 |
| 9Cl-PF3ONS | ND | — | Below MRL | 2025-08-13 |
| ADONA | ND | — | Below MRL | 2025-08-13 |
| 6:2 FTS | ND | — | Below MRL | 2025-08-13 |
| PFHxA | ND | — | Below MRL | 2025-08-13 |
| 8:2 FTS | ND | — | Below MRL | 2025-08-13 |
| PFMPA | ND | — | Below MRL | 2025-08-13 |
| PFPeA | ND | — | Below MRL | 2025-08-13 |
| PFMBA | ND | — | Below MRL | 2025-08-13 |
| PFEESA | ND | — | Below MRL | 2025-08-13 |
| NFDHA | ND | — | Below MRL | 2025-08-13 |
| PFPeS | ND | — | Below MRL | 2025-08-13 |
| PFTA | ND | — | Below MRL | 2025-08-13 |
| PFTrDA | ND | — | Below MRL | 2025-08-13 |
| NEtFOSAA | ND | — | Below MRL | 2025-08-13 |
| NMeFOSAA | ND | — | Below MRL | 2025-08-13 |
| PFBA | 5.9 | — | 2025-08-13 | |
| PFHxS | 5.3 | 10 | Detected | 2025-08-13 |
| PFOS | 4.4 | 4 | Exceeds | 2025-08-13 |
| PFHxS | 3.7 | 10 | Detected | 2025-04-16 |