PFAS Comply

WELLESLEY WATER DIVISION

PWSID: MA3317000 · WELLESLEY, MA · Serving 29,550 people

Type: CWSOwner: LSource: SW
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

PFOA6.3 ppt(MCL: 4 ppt)
PFOS6.6 ppt(MCL: 4 ppt)

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

Detection summary

6
PFAS compounds detected
6.6 ppt
Highest single detection
2025-07-23
Latest sample date
complete
Data completeness

All PFAS detection results

Source: EPA UCMR5 (UCMR5)

ContaminantResult (ppt)MCL (ppt)StatusSample date
PFBSND—Below MRL2025-10-01
NEtFOSAAND—Below MRL2025-01-21
NMeFOSAAND—Below MRL2025-01-21
lithiumND—Below MRL2025-01-21
PFTrDAND—Below MRL2025-01-21
NFDHAND—Below MRL2025-10-01
PFOSND4Below MRL2025-10-01
PFHpSND—Below MRL2025-10-01
PFEESAND—Below MRL2025-10-01
PFHxSND10Below MRL2025-10-01
lithiumND—Below MRL2025-10-01
PFTrDAND—Below MRL2025-10-01
PFTAND—Below MRL2025-10-01
PFHpAND—Below MRL2025-10-01
PFDAND—Below MRL2025-10-01
NMeFOSAAND—Below MRL2025-10-01
NEtFOSAAND—Below MRL2025-10-01
PFNAND10Below MRL2025-10-01
PFOAND4Below MRL2025-10-01
PFDoAND—Below MRL2025-10-01
PFHxAND—Below MRL2025-10-01
PFUnAND—Below MRL2025-10-01
11Cl-PF3OUdSND—Below MRL2025-10-01
PFHpAND—Below MRL2025-01-21
PFHxSND10Below MRL2025-01-21
PFDAND—Below MRL2025-01-21
PFDoAND—Below MRL2025-01-21
PFHxAND—Below MRL2025-01-21
PFUnAND—Below MRL2025-01-21
11Cl-PF3OUdSND—Below MRL2025-01-21
NFDHAND—Below MRL2025-01-21
PFTAND—Below MRL2025-01-21
PFNAND10Below MRL2025-01-21
PFPeSND—Below MRL2025-01-21
9Cl-PF3ONSND—Below MRL2025-01-21
PFEESAND—Below MRL2025-01-21
PFMBAND—Below MRL2025-01-21
PFPeAND—Below MRL2025-01-21
PFMPAND—Below MRL2025-01-21
8:2 FTSND—Below MRL2025-01-21
4:2 FTSND—Below MRL2025-01-21
6:2 FTSND—Below MRL2025-01-21
PFBAND—Below MRL2025-01-21
HFPO-DAND10Below MRL2025-01-21
ADONAND—Below MRL2025-01-21
PFHpSND—Below MRL2025-01-21
PFTrDAND—Below MRL2025-07-23
PFHxAND—Below MRL2025-07-23
PFDoAND—Below MRL2025-07-23
PFNAND10Below MRL2025-07-23
PFHxSND10Below MRL2025-07-23
PFHpAND—Below MRL2025-07-23
NEtFOSAAND—Below MRL2025-07-23
PFUnAND—Below MRL2025-07-23
PFTAND—Below MRL2025-07-23
PFDAND—Below MRL2025-07-23
NMeFOSAAND—Below MRL2025-07-23
4:2 FTSND—Below MRL2025-07-23
11Cl-PF3OUdSND—Below MRL2025-07-23
PFMPAND—Below MRL2025-07-23
lithiumND—Below MRL2025-07-23
8:2 FTSND—Below MRL2025-07-23
6:2 FTSND—Below MRL2025-07-23
PFBAND—Below MRL2025-07-23
PFHpSND—Below MRL2025-07-23
PFPeSND—Below MRL2025-07-23
HFPO-DAND10Below MRL2025-07-23
PFEESAND—Below MRL2025-07-23
PFMBAND—Below MRL2025-07-23
PFPeAND—Below MRL2025-07-23
9Cl-PF3ONSND—Below MRL2025-07-23
ADONAND—Below MRL2025-07-23
NFDHAND—Below MRL2025-07-23
PFHpSND—Below MRL2025-01-21
6:2 FTSND—Below MRL2025-01-21
4:2 FTSND—Below MRL2025-01-21
8:2 FTSND—Below MRL2025-01-21
PFMPAND—Below MRL2025-01-21
PFMBAND—Below MRL2025-01-21
PFBAND—Below MRL2025-01-21
NFDHAND—Below MRL2025-01-21
PFNAND10Below MRL2025-01-21
PFOSND4Below MRL2025-01-21
PFUnAND—Below MRL2025-01-21
PFPeSND—Below MRL2025-01-21
lithiumND—Below MRL2025-01-21
PFEESAND—Below MRL2025-01-21
PFTrDAND—Below MRL2025-01-21
HFPO-DAND10Below MRL2025-01-21
NMeFOSAAND—Below MRL2025-01-21
PFTAND—Below MRL2025-01-21
PFHpAND—Below MRL2025-01-21
PFHxSND10Below MRL2025-01-21
PFDAND—Below MRL2025-01-21
PFDoAND—Below MRL2025-01-21
11Cl-PF3OUdSND—Below MRL2025-01-21
9Cl-PF3ONSND—Below MRL2025-01-21
ADONAND—Below MRL2025-01-21
NEtFOSAAND—Below MRL2025-01-21
11Cl-PF3OUdSND—Below MRL2025-07-23
9Cl-PF3ONSND—Below MRL2025-07-23
ADONAND—Below MRL2025-07-23
HFPO-DAND10Below MRL2025-07-23
PFUnAND—Below MRL2025-07-23
6:2 FTSND—Below MRL2025-07-23
4:2 FTSND—Below MRL2025-07-23
8:2 FTSND—Below MRL2025-07-23
PFMPAND—Below MRL2025-07-23
PFPeSND—Below MRL2025-07-23
PFEESAND—Below MRL2025-07-23
PFMBAND—Below MRL2025-07-23
PFDoAND—Below MRL2025-07-23
PFOSND4Below MRL2025-07-23
PFNAND10Below MRL2025-07-23
PFDAND—Below MRL2025-07-23
lithiumND—Below MRL2025-07-23
PFHpAND—Below MRL2025-07-23
PFHpSND—Below MRL2025-07-23
NMeFOSAAND—Below MRL2025-07-23
NEtFOSAAND—Below MRL2025-07-23
PFTrDAND—Below MRL2025-07-23
PFTAND—Below MRL2025-07-23
NFDHAND—Below MRL2025-07-23
PFBAND—Below MRL2025-07-23
PFHxSND10Below MRL2025-07-23
PFTAND—Below MRL2025-01-21
PFHxAND—Below MRL2025-01-21
lithiumND—Below MRL2025-01-21
PFHpSND—Below MRL2025-01-21
PFTrDAND—Below MRL2025-01-21
ADONAND—Below MRL2025-01-21
PFOAND4Below MRL2025-01-21
PFPeSND—Below MRL2025-01-21
PFEESAND—Below MRL2025-01-21
PFMPAND—Below MRL2025-01-21
8:2 FTSND—Below MRL2025-01-21
4:2 FTSND—Below MRL2025-01-21
6:2 FTSND—Below MRL2025-01-21
PFDAND—Below MRL2025-01-21
HFPO-DAND10Below MRL2025-01-21
NEtFOSAAND—Below MRL2025-01-21
9Cl-PF3ONSND—Below MRL2025-01-21
11Cl-PF3OUdSND—Below MRL2025-01-21
PFUnAND—Below MRL2025-01-21
PFDoAND—Below MRL2025-01-21
PFOSND4Below MRL2025-01-21
PFHxSND10Below MRL2025-01-21
PFHpAND—Below MRL2025-01-21
PFBSND—Below MRL2025-01-21
NMeFOSAAND—Below MRL2025-01-21
PFBAND—Below MRL2025-01-21
PFNAND10Below MRL2025-01-21
PFMBAND—Below MRL2025-01-21
NFDHAND—Below MRL2025-01-21
11Cl-PF3OUdSND—Below MRL2025-07-23
NMeFOSAAND—Below MRL2025-07-23
NEtFOSAAND—Below MRL2025-07-23
PFTrDAND—Below MRL2025-07-23
PFTAND—Below MRL2025-07-23
lithiumND—Below MRL2025-07-23
8:2 FTSND—Below MRL2025-07-23
4:2 FTSND—Below MRL2025-07-23
6:2 FTSND—Below MRL2025-07-23
ADONAND—Below MRL2025-07-23
PFMPAND—Below MRL2025-07-23
9Cl-PF3ONSND—Below MRL2025-07-23
HFPO-DAND10Below MRL2025-07-23
PFHxSND10Below MRL2025-07-23
PFMBAND—Below MRL2025-07-23
PFEESAND—Below MRL2025-07-23
NFDHAND—Below MRL2025-07-23
PFPeSND—Below MRL2025-07-23
PFHpSND—Below MRL2025-07-23
PFHpAND—Below MRL2025-07-23
PFUnAND—Below MRL2025-07-23
PFNAND10Below MRL2025-07-23
PFOSND4Below MRL2025-07-23
PFOAND4Below MRL2025-07-23
PFDAND—Below MRL2025-07-23
PFDoAND—Below MRL2025-07-23
PFBSND—Below MRL2025-07-23
PFMPAND—Below MRL2025-01-21
PFPeAND—Below MRL2025-01-21
PFDoAND—Below MRL2025-01-21
PFUnAND—Below MRL2025-01-21
PFHxAND—Below MRL2025-01-21
PFDAND—Below MRL2025-01-21
PFOAND4Below MRL2025-01-21
PFOSND4Below MRL2025-01-21
PFNAND10Below MRL2025-01-21
PFEESAND—Below MRL2025-01-21
PFPeSND—Below MRL2025-01-21
PFHxSND10Below MRL2025-01-21
6:2 FTSND—Below MRL2025-01-21
NMeFOSAAND—Below MRL2025-01-21
PFMBAND—Below MRL2025-01-21
lithiumND—Below MRL2025-01-21
PFBSND—Below MRL2025-01-21
PFHpAND—Below MRL2025-01-21
NEtFOSAAND—Below MRL2025-01-21
NFDHAND—Below MRL2025-01-21
4:2 FTSND—Below MRL2025-01-21
PFBAND—Below MRL2025-01-21
HFPO-DAND10Below MRL2025-01-21
ADONAND—Below MRL2025-01-21
9Cl-PF3ONSND—Below MRL2025-01-21
PFTAND—Below MRL2025-01-21
11Cl-PF3OUdSND—Below MRL2025-01-21
PFTrDAND—Below MRL2025-01-21
PFHpSND—Below MRL2025-01-21
8:2 FTSND—Below MRL2025-01-21
PFPeSND—Below MRL2025-04-16
8:2 FTSND—Below MRL2025-04-16
6:2 FTSND—Below MRL2025-04-16
4:2 FTSND—Below MRL2025-04-16
PFBSND—Below MRL2025-04-16
PFMPAND—Below MRL2025-04-16
PFPeAND—Below MRL2025-04-16
PFMBAND—Below MRL2025-04-16
PFEESAND—Below MRL2025-04-16
PFHpSND—Below MRL2025-04-16
NFDHAND—Below MRL2025-04-16
lithiumND—Below MRL2025-04-16
PFDoAND—Below MRL2025-04-16
PFTAND—Below MRL2025-04-16
PFHxSND10Below MRL2025-04-16
PFHpAND—Below MRL2025-04-16
PFNAND10Below MRL2025-04-16
PFOSND4Below MRL2025-04-16
11Cl-PF3OUdSND—Below MRL2025-04-16
PFDAND—Below MRL2025-04-16
PFBAND—Below MRL2025-04-16
PFHxAND—Below MRL2025-04-16
PFTrDAND—Below MRL2025-04-16
PFUnAND—Below MRL2025-04-16
9Cl-PF3ONSND—Below MRL2025-04-16
ADONAND—Below MRL2025-04-16
HFPO-DAND10Below MRL2025-04-16
PFOAND4Below MRL2025-04-16
NEtFOSAAND—Below MRL2025-04-16
NMeFOSAAND—Below MRL2025-04-16
PFEESAND—Below MRL2025-07-23
9Cl-PF3ONSND—Below MRL2025-07-23
ADONAND—Below MRL2025-07-23
HFPO-DAND10Below MRL2025-07-23
PFBAND—Below MRL2025-07-23
6:2 FTSND—Below MRL2025-07-23
4:2 FTSND—Below MRL2025-07-23
8:2 FTSND—Below MRL2025-07-23
11Cl-PF3OUdSND—Below MRL2025-07-23
PFPeAND—Below MRL2025-07-23
PFMBAND—Below MRL2025-07-23
NFDHAND—Below MRL2025-07-23
PFPeSND—Below MRL2025-07-23
PFTAND—Below MRL2025-07-23
PFTrDAND—Below MRL2025-07-23
NEtFOSAAND—Below MRL2025-07-23
NMeFOSAAND—Below MRL2025-07-23
PFMPAND—Below MRL2025-07-23
PFHxSND10Below MRL2025-07-23
PFUnAND—Below MRL2025-07-23
PFHpSND—Below MRL2025-07-23
PFBSND—Below MRL2025-07-23
PFHpAND—Below MRL2025-07-23
lithiumND—Below MRL2025-07-23
PFNAND10Below MRL2025-07-23
PFOSND4Below MRL2025-07-23
PFOAND4Below MRL2025-07-23
PFDAND—Below MRL2025-07-23
PFDoAND—Below MRL2025-07-23
PFHxAND—Below MRL2025-07-23
PFPeSND—Below MRL2025-10-01
4:2 FTSND—Below MRL2025-10-01
HFPO-DAND10Below MRL2025-10-01
PFBAND—Below MRL2025-10-01
6:2 FTSND—Below MRL2025-10-01
ADONAND—Below MRL2025-10-01
8:2 FTSND—Below MRL2025-10-01
PFMPAND—Below MRL2025-10-01
PFPeAND—Below MRL2025-10-01
PFMBAND—Below MRL2025-10-01
9Cl-PF3ONSND—Below MRL2025-10-01
PFOS6.64Exceeds2025-07-23
PFOS6.44Exceeds2025-01-21
PFOA6.34Exceeds2025-01-21
PFOA6.24Exceeds2025-07-23
PFBS5.3—2025-07-23
PFBA5.2—2025-07-23
PFOA5.24Exceeds2025-01-21
PFOA4.74Exceeds2025-07-23
PFBS4.6—2025-01-21
PFPeA4.3—2025-07-23
PFHxA3.9—2025-01-21
PFBS3.7—2025-01-21
PFHxA3.6—2025-07-23
PFPeA3.5—2025-01-21
PFPeA3.5—2025-01-21
PFHxA3.3—2025-07-23
PFBS3.1—2025-07-23
PFPeA3.1—2025-07-23

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