PFAS Comply

HOLLISTON WATER DEPARTMENT

PWSID: MA2136000 · HOLLISTON, MA · Serving 15,713 people

Type: CWSOwner: LSource: GW
Settlement eligible
May qualify for 3M/DuPont settlement funds
Check claims portal →
Exceeds MCL

One or more PFAS compounds exceed EPA Maximum Contaminant Levels. Corrective action required by 2031.

Key contaminants vs MCL

PFOA5.3 ppt(MCL: 4 ppt)
PFOS6.5 ppt(MCL: 4 ppt)

EPA MCL: 4 ppt (parts per trillion) for PFOA and PFOS individually. Compliance deadline: 2031-12-31

Detection summary

5
PFAS compounds detected
6.5 ppt
Highest single detection
2025-09-10
Latest sample date
complete
Data completeness

All PFAS detection results

Source: EPA UCMR5 (UCMR5)

ContaminantResult (ppt)MCL (ppt)StatusSample date
PFOAND4Below MRL2025-09-10
lithiumND—Below MRL2025-04-15
NEtFOSAAND—Below MRL2025-04-15
PFTAND—Below MRL2025-04-15
NMeFOSAAND—Below MRL2025-04-15
NEtFOSAAND—Below MRL2025-09-10
lithiumND—Below MRL2025-09-10
PFTrDAND—Below MRL2025-09-10
PFTAND—Below MRL2025-09-10
NMeFOSAAND—Below MRL2025-09-10
PFOSND4Below MRL2025-04-15
11Cl-PF3OUdSND—Below MRL2025-04-15
PFUnAND—Below MRL2025-04-15
PFDoAND—Below MRL2025-09-10
PFTAND—Below MRL2025-09-10
NEtFOSAAND—Below MRL2025-09-10
NMeFOSAAND—Below MRL2025-09-10
lithiumND—Below MRL2025-09-10
PFHxAND—Below MRL2025-09-10
PFHpAND—Below MRL2025-09-10
PFHxSND10Below MRL2025-09-10
PFNAND10Below MRL2025-09-10
PFOSND4Below MRL2025-09-10
PFDAND—Below MRL2025-09-10
PFBSND—Below MRL2025-09-10
PFTrDAND—Below MRL2025-04-15
PFDoAND—Below MRL2025-04-15
ADONAND—Below MRL2025-04-15
8:2 FTSND—Below MRL2025-04-15
PFNAND10Below MRL2025-04-15
PFHxSND10Below MRL2025-04-15
PFHpAND—Below MRL2025-04-15
PFDAND—Below MRL2025-04-15
PFBAND—Below MRL2025-04-15
4:2 FTSND—Below MRL2025-04-15
PFMPAND—Below MRL2025-04-15
PFPeAND—Below MRL2025-04-15
PFMBAND—Below MRL2025-04-15
PFEESAND—Below MRL2025-04-15
NFDHAND—Below MRL2025-04-15
PFPeSND—Below MRL2025-04-15
PFHpSND—Below MRL2025-04-15
9Cl-PF3ONSND—Below MRL2025-04-15
PFBSND—Below MRL2025-04-15
6:2 FTSND—Below MRL2025-04-15
lithiumND—Below MRL2025-04-15
PFTAND—Below MRL2025-04-15
PFTrDAND—Below MRL2025-04-15
NEtFOSAAND—Below MRL2025-04-15
NMeFOSAAND—Below MRL2025-04-15
HFPO-DAND10Below MRL2025-04-15
PFHpAND—Below MRL2025-09-10
PFDoAND—Below MRL2025-09-10
PFDAND—Below MRL2025-09-10
4:2 FTSND—Below MRL2025-09-10
PFUnAND—Below MRL2025-09-10
PFHxSND10Below MRL2025-09-10
PFOSND4Below MRL2025-09-10
lithiumND—Below MRL2025-09-10
PFMBAND—Below MRL2025-09-10
PFEESAND—Below MRL2025-09-10
8:2 FTSND—Below MRL2025-09-10
PFNAND10Below MRL2025-09-10
11Cl-PF3OUdSND—Below MRL2025-09-10
NFDHAND—Below MRL2025-09-10
PFPeSND—Below MRL2025-09-10
PFHpSND—Below MRL2025-09-10
PFTAND—Below MRL2025-09-10
PFTrDAND—Below MRL2025-09-10
NMeFOSAAND—Below MRL2025-09-10
6:2 FTSND—Below MRL2025-09-10
PFBAND—Below MRL2025-09-10
HFPO-DAND10Below MRL2025-09-10
ADONAND—Below MRL2025-09-10
9Cl-PF3ONSND—Below MRL2025-09-10
NEtFOSAAND—Below MRL2025-09-10
PFMPAND—Below MRL2025-09-10
PFPeSND—Below MRL2025-04-15
11Cl-PF3OUdSND—Below MRL2025-04-15
9Cl-PF3ONSND—Below MRL2025-04-15
HFPO-DAND10Below MRL2025-04-15
6:2 FTSND—Below MRL2025-04-15
4:2 FTSND—Below MRL2025-04-15
8:2 FTSND—Below MRL2025-04-15
PFMPAND—Below MRL2025-04-15
PFPeAND—Below MRL2025-04-15
PFMBAND—Below MRL2025-04-15
NFDHAND—Below MRL2025-04-15
PFHpSND—Below MRL2025-04-15
ADONAND—Below MRL2025-04-15
PFUnAND—Below MRL2025-04-15
PFEESAND—Below MRL2025-04-15
PFTrDAND—Below MRL2025-04-15
PFBAND—Below MRL2025-04-15
PFHxAND—Below MRL2025-04-15
PFTAND—Below MRL2025-04-15
NEtFOSAAND—Below MRL2025-04-15
NMeFOSAAND—Below MRL2025-04-15
PFHpAND—Below MRL2025-04-15
PFNAND10Below MRL2025-04-15
PFDoAND—Below MRL2025-04-15
PFDAND—Below MRL2025-04-15
PFHxSND10Below MRL2025-04-15
lithiumND—Below MRL2025-04-15
PFMBAND—Below MRL2025-09-10
9Cl-PF3ONSND—Below MRL2025-09-10
ADONAND—Below MRL2025-09-10
HFPO-DAND10Below MRL2025-09-10
PFBAND—Below MRL2025-09-10
6:2 FTSND—Below MRL2025-09-10
4:2 FTSND—Below MRL2025-09-10
8:2 FTSND—Below MRL2025-09-10
PFPeAND—Below MRL2025-09-10
PFEESAND—Below MRL2025-09-10
PFHxAND—Below MRL2025-09-10
PFHpSND—Below MRL2025-09-10
NFDHAND—Below MRL2025-09-10
PFPeSND—Below MRL2025-09-10
PFMPAND—Below MRL2025-09-10
NEtFOSAAND—Below MRL2025-09-10
11Cl-PF3OUdSND—Below MRL2025-09-10
PFUnAND—Below MRL2025-09-10
lithiumND—Below MRL2025-09-10
PFTrDAND—Below MRL2025-09-10
NMeFOSAAND—Below MRL2025-09-10
PFDAND—Below MRL2025-09-10
PFTAND—Below MRL2025-09-10
PFDoAND—Below MRL2025-09-10
PFHpAND—Below MRL2025-09-10
PFNAND10Below MRL2025-09-10
PFHxSND10Below MRL2025-09-10
ADONAND—Below MRL2025-04-15
PFNAND10Below MRL2025-04-15
PFOAND4Below MRL2025-04-15
NMeFOSAAND—Below MRL2025-04-15
PFDAND—Below MRL2025-04-15
NEtFOSAAND—Below MRL2025-04-15
PFDoAND—Below MRL2025-04-15
PFOSND4Below MRL2025-04-15
HFPO-DAND10Below MRL2025-04-15
NFDHAND—Below MRL2025-04-15
PFPeSND—Below MRL2025-04-15
PFHpSND—Below MRL2025-04-15
lithiumND—Below MRL2025-04-15
PFTAND—Below MRL2025-04-15
PFPeAND—Below MRL2025-04-15
PFTrDAND—Below MRL2025-04-15
PFEESAND—Below MRL2025-04-15
PFHxSND10Below MRL2025-04-15
PFHxAND—Below MRL2025-04-15
PFUnAND—Below MRL2025-04-15
11Cl-PF3OUdSND—Below MRL2025-04-15
9Cl-PF3ONSND—Below MRL2025-04-15
PFBAND—Below MRL2025-04-15
4:2 FTSND—Below MRL2025-04-15
8:2 FTSND—Below MRL2025-04-15
PFMPAND—Below MRL2025-04-15
PFMBAND—Below MRL2025-04-15
PFHpAND—Below MRL2025-04-15
6:2 FTSND—Below MRL2025-04-15
NFDHAND—Below MRL2025-09-10
6:2 FTSND—Below MRL2025-09-10
PFUnAND—Below MRL2025-09-10
11Cl-PF3OUdSND—Below MRL2025-09-10
9Cl-PF3ONSND—Below MRL2025-09-10
ADONAND—Below MRL2025-09-10
HFPO-DAND10Below MRL2025-09-10
8:2 FTSND—Below MRL2025-09-10
PFPeAND—Below MRL2025-09-10
PFHpSND—Below MRL2025-09-10
PFEESAND—Below MRL2025-09-10
PFPeSND—Below MRL2025-09-10
PFBAND—Below MRL2025-09-10
4:2 FTSND—Below MRL2025-09-10
PFMBAND—Below MRL2025-09-10
PFTrDAND—Below MRL2025-09-10
PFMPAND—Below MRL2025-09-10
PFOS6.54Exceeds2025-09-10
PFOA5.34Exceeds2025-09-10
PFOS5.34Exceeds2025-04-15
PFOA4.94Exceeds2025-04-15
PFOA4.44Exceeds2025-09-10
PFOA4.44Exceeds2025-04-15
PFBS3.9—2025-09-10
PFBS3.7—2025-09-10
PFBS3.5—2025-04-15
PFHxA3.5—2025-09-10
PFHxA3.4—2025-04-15
PFPeA3.3—2025-09-10
PFBS3.1—2025-04-15

Violation history

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(PFHxA)
2022-10-01 · Resolved · Tier 3

Next steps