D.C. WATER AND SEWER AUTHORITY
PWSID: DC0000002 · WASHINGTON, DC · Serving 632,323 people
Type: CWSOwner: LSource: SW
Settlement eligible
Settlement details
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Upgrade to ProCompliant
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
4.7 ppt
Highest single detection
2024-07-22
Latest sample date
All PFAS detection results
Source: EPA UCMR5 (UCMR5) · 232 compounds tested
| Contaminant | Result (ppt) | MCL (ppt) | Status | Sample date |
|---|
| 11Cl-PF3OUdS | ND | — | Below MRL | 2024-10-16 |
| PFHpA | ND | — | Below MRL | 2024-02-20 |
| PFUnA | ND | — | Below MRL | 2024-02-20 |
| PFHxS | ND | 10 | Below MRL | 2024-02-20 |
| PFNA | ND | 10 | Below MRL | 2024-02-20 |