PFAS Comply

HOPKINTON WATER DEPARTMENT

PWSID: MA2139000 · HOPKINTON, MA · Serving 12,586 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

PFOA7.2 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
7.2 ppt
Highest single detection
2025-08-18
Latest sample date
complete
Data completeness

All PFAS detection results

Source: EPA UCMR5 (UCMR5)

ContaminantResult (ppt)MCL (ppt)StatusSample date
8:2 FTSND—Below MRL2025-08-18
PFPeSND—Below MRL2025-02-11
NFDHAND—Below MRL2025-02-11
PFEESAND—Below MRL2025-02-11
PFMBAND—Below MRL2025-02-11
PFPeAND—Below MRL2025-02-11
PFMPAND—Below MRL2025-02-11
8:2 FTSND—Below MRL2025-02-11
PFUnAND—Below MRL2025-02-11
6:2 FTSND—Below MRL2025-02-11
9Cl-PF3ONSND—Below MRL2025-02-11
PFBSND—Below MRL2025-02-11
PFHpAND—Below MRL2025-02-11
PFHxSND10Below MRL2025-02-11
PFNAND10Below MRL2025-02-11
PFOSND4Below MRL2025-02-11
PFDAND—Below MRL2025-02-11
PFDoAND—Below MRL2025-02-11
PFHxAND—Below MRL2025-02-11
4:2 FTSND—Below MRL2025-02-11
PFTAND—Below MRL2025-02-11
PFBAND—Below MRL2025-02-11
HFPO-DAND10Below MRL2025-02-11
NMeFOSAAND—Below MRL2025-02-11
NEtFOSAAND—Below MRL2025-02-11
PFHpSND—Below MRL2025-02-11
PFTrDAND—Below MRL2025-02-11
11Cl-PF3OUdSND—Below MRL2025-02-11
lithiumND—Below MRL2025-02-11
ADONAND—Below MRL2025-02-11
PFMBAND—Below MRL2025-08-18
PFPeAND—Below MRL2025-08-18
PFMPAND—Below MRL2025-08-18
6:2 FTSND—Below MRL2025-08-18
4:2 FTSND—Below MRL2025-08-18
PFTAND—Below MRL2025-08-18
PFTrDAND—Below MRL2025-08-18
NEtFOSAAND—Below MRL2025-08-18
NMeFOSAAND—Below MRL2025-08-18
PFDAND—Below MRL2025-08-18
lithiumND—Below MRL2025-08-18
PFOAND4Below MRL2025-08-18
8:2 FTSND—Below MRL2025-08-18
PFEESAND—Below MRL2025-08-18
PFDoAND—Below MRL2025-08-18
PFHxAND—Below MRL2025-08-18
11Cl-PF3OUdSND—Below MRL2025-08-18
PFOSND4Below MRL2025-08-18
PFNAND10Below MRL2025-08-18
PFHxSND10Below MRL2025-08-18
9Cl-PF3ONSND—Below MRL2025-08-18
PFBSND—Below MRL2025-08-18
PFPeSND—Below MRL2025-08-18
PFUnAND—Below MRL2025-08-18
ADONAND—Below MRL2025-08-18
NFDHAND—Below MRL2025-08-18
PFHpSND—Below MRL2025-08-18
PFHpAND—Below MRL2025-08-18
6:2 FTSND—Below MRL2025-08-18
PFHpAND—Below MRL2025-08-18
PFHpSND—Below MRL2025-08-18
PFPeSND—Below MRL2025-08-18
NFDHAND—Below MRL2025-08-18
PFMBAND—Below MRL2025-08-18
PFEESAND—Below MRL2025-08-18
4:2 FTSND—Below MRL2025-08-18
PFTrDAND—Below MRL2025-08-18
lithiumND—Below MRL2025-08-18
PFHxSND10Below MRL2025-08-18
NMeFOSAAND—Below MRL2025-08-18
PFOAND4Below MRL2025-02-11
HFPO-DAND10Below MRL2025-08-18
PFUnAND—Below MRL2025-02-11
4:2 FTSND—Below MRL2025-02-11
PFHxSND10Below MRL2025-02-11
PFDoAND—Below MRL2025-02-11
PFOSND4Below MRL2025-02-11
PFOAND4Below MRL2025-02-11
PFDAND—Below MRL2025-02-11
PFHxAND—Below MRL2025-02-11
NMeFOSAAND—Below MRL2025-03-24
11Cl-PF3OUdSND—Below MRL2025-02-11
9Cl-PF3ONSND—Below MRL2025-02-11
ADONAND—Below MRL2025-02-11
HFPO-DAND10Below MRL2025-02-11
6:2 FTSND—Below MRL2025-02-11
PFHpAND—Below MRL2025-02-11
8:2 FTSND—Below MRL2025-02-11
PFMPAND—Below MRL2025-02-11
PFPeAND—Below MRL2025-02-11
PFMBAND—Below MRL2025-02-11
NFDHAND—Below MRL2025-02-11
PFPeSND—Below MRL2025-02-11
PFHpSND—Below MRL2025-02-11
PFTAND—Below MRL2025-03-24
PFTrDAND—Below MRL2025-03-24
NEtFOSAAND—Below MRL2025-03-24
lithiumND—Below MRL2025-02-11
PFBAND—Below MRL2025-02-11
PFNAND10Below MRL2025-02-11
PFEESAND—Below MRL2025-02-11
PFTrDAND—Below MRL2025-08-18
PFMPAND—Below MRL2025-08-18
8:2 FTSND—Below MRL2025-08-18
4:2 FTSND—Below MRL2025-08-18
6:2 FTSND—Below MRL2025-08-18
PFBAND—Below MRL2025-08-18
PFTAND—Below MRL2025-08-18
PFEESAND—Below MRL2025-08-18
NEtFOSAAND—Below MRL2025-08-18
NMeFOSAAND—Below MRL2025-08-18
ADONAND—Below MRL2025-08-18
9Cl-PF3ONSND—Below MRL2025-08-18
11Cl-PF3OUdSND—Below MRL2025-08-18
lithiumND—Below MRL2025-08-18
HFPO-DAND10Below MRL2025-08-18
PFNAND10Below MRL2025-08-18
PFUnAND—Below MRL2025-08-18
PFHxAND—Below MRL2025-08-18
PFDoAND—Below MRL2025-08-18
PFDAND—Below MRL2025-08-18
PFOAND4Below MRL2025-08-18
PFPeAND—Below MRL2025-08-18
PFOSND4Below MRL2025-08-18
PFMBAND—Below MRL2025-08-18
PFHxSND10Below MRL2025-08-18
PFHpAND—Below MRL2025-08-18
PFHpSND—Below MRL2025-08-18
PFPeSND—Below MRL2025-08-18
NFDHAND—Below MRL2025-08-18
11Cl-PF3OUdSND—Below MRL2025-02-11
PFHxSND10Below MRL2025-02-11
9Cl-PF3ONSND—Below MRL2025-02-11
ADONAND—Below MRL2025-02-11
PFDoAND—Below MRL2025-02-11
PFUnAND—Below MRL2025-02-11
PFNAND10Below MRL2025-02-11
HFPO-DAND10Below MRL2025-02-11
PFBSND—Below MRL2025-02-11
PFTrDAND—Below MRL2025-02-11
PFHpAND—Below MRL2025-02-11
PFOSND4Below MRL2025-02-11
PFBAND—Below MRL2025-02-11
6:2 FTSND—Below MRL2025-02-11
8:2 FTSND—Below MRL2025-02-11
PFPeAND—Below MRL2025-02-11
PFMBAND—Below MRL2025-02-11
PFEESAND—Below MRL2025-02-11
NFDHAND—Below MRL2025-02-11
PFPeSND—Below MRL2025-02-11
PFTAND—Below MRL2025-02-11
NEtFOSAAND—Below MRL2025-02-11
NMeFOSAAND—Below MRL2025-02-11
lithiumND—Below MRL2025-02-11
4:2 FTSND—Below MRL2025-02-11
PFDAND—Below MRL2025-02-11
PFHpSND—Below MRL2025-02-11
PFMPAND—Below MRL2025-02-11
PFHpSND—Below MRL2025-02-11
PFNAND10Below MRL2025-02-11
PFOSND4Below MRL2025-02-11
PFDAND—Below MRL2025-02-11
PFDoAND—Below MRL2025-02-11
PFUnAND—Below MRL2025-02-11
PFHxSND10Below MRL2025-02-11
ADONAND—Below MRL2025-02-11
9Cl-PF3ONSND—Below MRL2025-02-11
PFPeSND—Below MRL2025-02-11
HFPO-DAND10Below MRL2025-02-11
PFBAND—Below MRL2025-02-11
6:2 FTSND—Below MRL2025-02-11
4:2 FTSND—Below MRL2025-02-11
lithiumND—Below MRL2025-02-11
11Cl-PF3OUdSND—Below MRL2025-02-11
PFEESAND—Below MRL2025-02-11
PFHpAND—Below MRL2025-02-11
NFDHAND—Below MRL2025-02-11
PFMBAND—Below MRL2025-02-11
PFTAND—Below MRL2025-02-11
8:2 FTSND—Below MRL2025-02-11
PFTrDAND—Below MRL2025-02-11
NEtFOSAAND—Below MRL2025-02-11
NMeFOSAAND—Below MRL2025-02-11
PFMPAND—Below MRL2025-02-11
9Cl-PF3ONSND—Below MRL2025-08-18
PFUnAND—Below MRL2025-08-18
11Cl-PF3OUdSND—Below MRL2025-08-18
PFDoAND—Below MRL2025-08-18
ADONAND—Below MRL2025-08-18
HFPO-DAND10Below MRL2025-08-18
PFBAND—Below MRL2025-08-18
PFDAND—Below MRL2025-08-18
PFMPAND—Below MRL2025-08-18
PFTAND—Below MRL2025-08-18
NEtFOSAAND—Below MRL2025-08-18
PFOSND4Below MRL2025-08-18
PFNAND10Below MRL2025-08-18
PFOA7.24Exceeds2025-08-18
PFBA6.2—2025-08-18
PFOA6.14Exceeds2025-02-11
PFPeA5.8—2025-08-18
PFBS5.5—2025-02-11
PFHxA4.6—2025-08-18
PFOA44Detected2025-02-11
PFPeA3.8—2025-02-11
PFBS3.8—2025-08-18
PFBS3.5—2025-08-18
PFHxA3.4—2025-02-11
PFHxA3.4—2025-02-11
PFBS3.3—2025-02-11

Next steps