PFAS Comply

WOBURN WATER DEPT.

PWSID: MA3347000 · WOBURN, MA · Serving 40,876 people

Type: CWSOwner: LSource: SW
Settlement eligible
May qualify for 3M/DuPont settlement funds
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Exceeds MCL

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

Key contaminants vs MCL

PFOA8.4 ppt(MCL: 4 ppt)
PFOS6.9 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
8.4 ppt
Highest single detection
2025-07-22
Latest sample date
complete
Data completeness

All PFAS detection results

Source: EPA UCMR5 (UCMR5)

ContaminantResult (ppt)MCL (ppt)StatusSample date
PFDAND—Below MRL2025-07-22
PFHpAND—Below MRL2025-01-14
PFHxSND10Below MRL2025-01-14
PFNAND10Below MRL2025-01-14
PFOSND4Below MRL2025-01-14
PFOAND4Below MRL2025-01-14
PFDAND—Below MRL2025-01-14
PFDoAND—Below MRL2025-01-14
PFMBAND—Below MRL2025-01-14
PFUnAND—Below MRL2025-01-14
PFBSND—Below MRL2025-01-14
PFMPAND—Below MRL2025-01-14
PFPeAND—Below MRL2025-01-14
PFTrDAND—Below MRL2025-01-14
PFEESAND—Below MRL2025-01-14
PFPeSND—Below MRL2025-01-14
NFDHAND—Below MRL2025-01-14
PFHxAND—Below MRL2025-01-14
NEtFOSAAND—Below MRL2025-01-14
NMeFOSAAND—Below MRL2025-01-14
PFHpSND—Below MRL2025-01-14
8:2 FTSND—Below MRL2025-01-14
PFTAND—Below MRL2025-01-14
11Cl-PF3OUdSND—Below MRL2025-01-14
9Cl-PF3ONSND—Below MRL2025-01-14
ADONAND—Below MRL2025-01-14
HFPO-DAND10Below MRL2025-01-14
6:2 FTSND—Below MRL2025-01-14
4:2 FTSND—Below MRL2025-01-14
lithiumND—Below MRL2025-01-14
PFHxSND10Below MRL2025-04-08
PFTrDAND—Below MRL2025-04-08
NEtFOSAAND—Below MRL2025-04-08
NMeFOSAAND—Below MRL2025-04-08
PFBSND—Below MRL2025-04-08
lithiumND—Below MRL2025-04-08
PFTAND—Below MRL2025-04-08
PFHpAND—Below MRL2025-04-08
4:2 FTSND—Below MRL2025-04-08
PFHpSND—Below MRL2025-04-08
PFPeSND—Below MRL2025-04-08
NFDHAND—Below MRL2025-04-08
PFEESAND—Below MRL2025-04-08
PFMBAND—Below MRL2025-04-08
PFPeAND—Below MRL2025-04-08
8:2 FTSND—Below MRL2025-04-08
6:2 FTSND—Below MRL2025-04-08
PFBAND—Below MRL2025-04-08
HFPO-DAND10Below MRL2025-04-08
PFDAND—Below MRL2025-04-08
PFNAND10Below MRL2025-04-08
PFMPAND—Below MRL2025-04-08
PFOAND4Below MRL2025-04-08
ADONAND—Below MRL2025-04-08
PFDoAND—Below MRL2025-04-08
PFHxAND—Below MRL2025-04-08
PFUnAND—Below MRL2025-04-08
11Cl-PF3OUdSND—Below MRL2025-04-08
9Cl-PF3ONSND—Below MRL2025-04-08
PFOSND4Below MRL2025-04-08
PFMBAND—Below MRL2025-07-22
PFBAND—Below MRL2025-07-22
6:2 FTSND—Below MRL2025-07-22
4:2 FTSND—Below MRL2025-07-22
8:2 FTSND—Below MRL2025-07-22
PFMPAND—Below MRL2025-07-22
PFDAND—Below MRL2025-07-22
PFTAND—Below MRL2025-07-22
PFPeAND—Below MRL2025-07-22
PFEESAND—Below MRL2025-07-22
NFDHAND—Below MRL2025-07-22
PFPeSND—Below MRL2025-07-22
PFHpSND—Below MRL2025-07-22
HFPO-DAND10Below MRL2025-07-22
PFDoAND—Below MRL2025-07-22
ADONAND—Below MRL2025-07-22
9Cl-PF3ONSND—Below MRL2025-07-22
11Cl-PF3OUdSND—Below MRL2025-07-22
PFOAND4Below MRL2025-07-22
PFOSND4Below MRL2025-07-22
PFNAND10Below MRL2025-07-22
PFHxSND10Below MRL2025-07-22
PFHpAND—Below MRL2025-07-22
PFBSND—Below MRL2025-07-22
lithiumND—Below MRL2025-07-22
PFUnAND—Below MRL2025-07-22
PFHxAND—Below MRL2025-07-22
NMeFOSAAND—Below MRL2025-07-22
PFTrDAND—Below MRL2025-07-22
NEtFOSAAND—Below MRL2025-07-22
NEtFOSAAND—Below MRL2025-10-14
PFTrDAND—Below MRL2025-10-14
PFTAND—Below MRL2025-10-14
lithiumND—Below MRL2025-10-14
NMeFOSAAND—Below MRL2025-10-14
PFHxAND—Below MRL2025-10-14
PFOSND4Below MRL2025-10-14
PFBSND—Below MRL2025-10-14
PFHpAND—Below MRL2025-10-14
PFNAND10Below MRL2025-10-14
PFOAND4Below MRL2025-10-14
PFDAND—Below MRL2025-10-14
PFDoAND—Below MRL2025-10-14
PFMPAND—Below MRL2025-10-14
PFHxSND10Below MRL2025-10-14
PFHpSND—Below MRL2025-10-14
PFPeSND—Below MRL2025-10-14
NFDHAND—Below MRL2025-10-14
PFEESAND—Below MRL2025-10-14
HFPO-DAND10Below MRL2025-10-14
PFPeAND—Below MRL2025-10-14
9Cl-PF3ONSND—Below MRL2025-10-14
11Cl-PF3OUdSND—Below MRL2025-10-14
8:2 FTSND—Below MRL2025-10-14
PFUnAND—Below MRL2025-10-14
4:2 FTSND—Below MRL2025-10-14
6:2 FTSND—Below MRL2025-10-14
PFBAND—Below MRL2025-10-14
ADONAND—Below MRL2025-10-14
PFMBAND—Below MRL2025-10-14
9Cl-PF3ONSND—Below MRL2025-01-14
PFTAND—Below MRL2025-01-14
NEtFOSAAND—Below MRL2025-01-14
8:2 FTSND—Below MRL2025-01-14
PFHpSND—Below MRL2025-01-14
PFMBAND—Below MRL2025-01-14
PFMPAND—Below MRL2025-01-14
PFHxAND—Below MRL2025-01-14
PFHxSND10Below MRL2025-01-14
PFDoAND—Below MRL2025-01-14
PFEESAND—Below MRL2025-01-14
11Cl-PF3OUdSND—Below MRL2025-01-14
4:2 FTSND—Below MRL2025-01-14
6:2 FTSND—Below MRL2025-01-14
PFBAND—Below MRL2025-01-14
HFPO-DAND10Below MRL2025-01-14
ADONAND—Below MRL2025-01-14
PFTrDAND—Below MRL2025-01-14
NFDHAND—Below MRL2025-01-14
PFTAND—Below MRL2025-07-22
11Cl-PF3OUdSND—Below MRL2025-07-22
NEtFOSAAND—Below MRL2025-07-22
lithiumND—Below MRL2025-07-22
PFHpAND—Below MRL2025-07-22
PFHxSND10Below MRL2025-07-22
PFNAND10Below MRL2025-07-22
PFTrDAND—Below MRL2025-07-22
PFBAND—Below MRL2025-01-14
NMeFOSAAND—Below MRL2025-01-14
lithiumND—Below MRL2025-01-14
PFUnAND—Below MRL2025-01-14
PFPeAND—Below MRL2025-01-14
PFPeSND—Below MRL2025-01-14
PFHpAND—Below MRL2025-01-14
PFDAND—Below MRL2025-01-14
PFNAND10Below MRL2025-01-14
PFDoAND—Below MRL2025-07-22
PFMPAND—Below MRL2025-07-22
NFDHAND—Below MRL2025-07-22
PFEESAND—Below MRL2025-07-22
PFMBAND—Below MRL2025-07-22
PFPeSND—Below MRL2025-07-22
PFUnAND—Below MRL2025-07-22
4:2 FTSND—Below MRL2025-07-22
HFPO-DAND10Below MRL2025-07-22
9Cl-PF3ONSND—Below MRL2025-07-22
8:2 FTSND—Below MRL2025-07-22
ADONAND—Below MRL2025-07-22
NMeFOSAAND—Below MRL2025-07-22
6:2 FTSND—Below MRL2025-07-22
PFHpSND—Below MRL2025-07-22
PFOA8.44Exceeds2025-07-22
PFBA7—2025-07-22
PFOS6.94Exceeds2025-07-22
PFOS64Exceeds2025-01-14
PFOA5.94Exceeds2025-01-14
PFPeA3.8—2025-07-22
PFBS3.8—2025-01-14
PFBS3.8—2025-07-22
PFHxA3.7—2025-07-22

Next steps