Mashantucket Pequot Water System
PWSID: 010106001 · MASHANTUCKET, CT · Serving 26,445 people
Type: CWSOwner: NSource: SW
Settlement eligible
Settlement details
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Upgrade to ProExceeds MCL
One or more PFAS compounds exceed EPA Maximum Contaminant Levels. Corrective action required by 2031.
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
19.1 ppt
Highest single detection
2023-09-27
Latest sample date
complete
Data completeness
All PFAS detection results
Source: EPA UCMR5 (UCMR5) · 116 compounds tested
| Contaminant | Result (ppt) | MCL (ppt) | Status | Sample date |
|---|
| NFDHA | ND | — | Below MRL | 2024-05-13 |
| PFTrDA | ND | — | Below MRL | 2024-04-03 |
| NEtFOSAA | ND | — | Below MRL | 2024-04-03 |
| NMeFOSAA | ND | — | Below MRL | 2024-04-03 |
| PFPeS | ND | — | Below MRL | 2024-05-13 |
Violation history(7 violations, all resolved)
Monitoring & Reporting - PFOA(PFOA)
2016-01-01 · Resolved · Tier 3
Monitoring & Reporting - PFOS(PFOS)
2016-01-01 · Resolved · Tier 3
Monitoring & Reporting - PFHxS(PFHxS)
2016-01-01 · Resolved · Tier 3
Monitoring & Reporting - HFPO-DA (GenX)(HFPO-DA (GenX))
2016-01-01 · Resolved · Tier 3
Monitoring & Reporting - PFNA(PFNA)
2016-01-01 · Resolved · Tier 3
Monitoring & Reporting - PFHxA(PFHxA)
2016-01-01 · Resolved · Tier 3
Monitoring & Reporting - PFBS
Violation details
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