Fort Defiance-Window Rock-St Michaels NTUA
PWSID: NN0403000 · Ft Defiance, AZ · Serving 12,869 people
Type: CWSOwner: NSource: GW
Settlement eligible
Settlement details
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All PFAS compounds below EPA Maximum Contaminant Levels.
Key contaminants vs MCL
EPA MCL: 4 ppt (parts per trillion) for PFOA and PFOS individually. Compliance deadline: 2031-12-31
Exact contamination levels
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Upgrade to ProDetection summary
138 ppt
Highest single detection
2025-08-18
Latest sample date
All PFAS detection results
Source: EPA UCMR5 (UCMR5) · 406 compounds tested
| Contaminant | Result (ppt) | MCL (ppt) | Status | Sample date |
|---|
| PFMBA | ND | — | Below MRL | 2024-07-22 |
| ADONA | ND | — | Below MRL | 2024-07-22 |
| HFPO-DA | ND | 10 | Below MRL | 2024-07-22 |
| PFBA | ND | — | Below MRL | 2024-07-22 |
| 6:2 FTS | ND | — | Below MRL | 2024-07-22 |