HOLLISTON WATER DEPARTMENT
PWSID: MA2136000 · HOLLISTON, MA · Serving 15,713 people
Type: CWSOwner: LSource: GW
Settlement eligible
Settlement details
Upgrade to Pro to view eligibility details and access the claims portal.
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
Upgrade to Pro to see PFOA/PFOS ppt values and MCL comparison charts.
Upgrade to ProDetection summary
6.5 ppt
Highest single detection
2025-09-10
Latest sample date
complete
Data completeness
All PFAS detection results
Source: EPA UCMR5 (UCMR5) · 182 compounds tested
| Contaminant | Result (ppt) | MCL (ppt) | Status | Sample date |
|---|
| PFOA | ND | 4 | Below MRL | 2025-09-10 |
| NEtFOSAA | ND | — | Below MRL | 2025-04-15 |
| PFTA | ND | — | Below MRL | 2025-04-15 |
| NMeFOSAA | ND | — | Below MRL | 2025-04-15 |
| NEtFOSAA | ND | — | Below MRL | 2025-09-10 |
Violation history(7 violations, all resolved)
Monitoring & Reporting - PFOA(PFOA)
2022-10-01 · Resolved · Tier 3
Monitoring & Reporting - PFOS(PFOS)
2022-10-01 · Resolved · Tier 3
Monitoring & Reporting - HFPO-DA (GenX)(HFPO-DA (GenX))
2022-10-01 · Resolved · Tier 3
Monitoring & Reporting - PFHxS(PFHxS)
2022-10-01 · Resolved · Tier 3
Monitoring & Reporting - PFNA(PFNA)
2022-10-01 · Resolved · Tier 3
Monitoring & Reporting - PFBS(PFBS)
2022-10-01 · Resolved · Tier 3
Monitoring & Reporting - PFHxA
Violation details
Upgrade to Pro to view full violation history, enforcement actions, and resolution status.
Upgrade to Pro