PFAS Comply

WESTON MUNICIPAL UTILITIES

PWSID: WI7370163 · WESTON, WI · Serving 16,000 people

Type: CWSOwner: LSource: GW
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

PFOA5.9 ppt(MCL: 4 ppt)
PFOS13 ppt(MCL: 4 ppt)

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

Detection summary

8
PFAS compounds detected
22 ppt
Highest single detection
2025-08-26
Latest sample date
complete
Data completeness

All PFAS detection results

Source: EPA UCMR5 (UCMR5)

ContaminantResult (ppt)MCL (ppt)StatusSample date
PFDoAND—Below MRL2025-02-13
PFPeAND—Below MRL2025-02-13
PFHpSND—Below MRL2025-02-13
PFMBAND—Below MRL2025-02-13
PFEESAND—Below MRL2025-02-13
NFDHAND—Below MRL2025-02-13
PFPeSND—Below MRL2025-02-13
HFPO-DAND10Below MRL2025-02-13
PFBAND—Below MRL2025-02-13
6:2 FTSND—Below MRL2025-02-13
4:2 FTSND—Below MRL2025-02-13
PFMPAND—Below MRL2025-02-13
9Cl-PF3ONSND—Below MRL2025-02-13
PFTrDAND—Below MRL2025-02-13
8:2 FTSND—Below MRL2025-02-13
PFNAND10Below MRL2025-02-13
PFTAND—Below MRL2025-02-13
NEtFOSAAND—Below MRL2025-02-13
lithiumND—Below MRL2025-02-13
PFBAND—Below MRL2025-02-13
PFUnAND—Below MRL2025-02-13
PFTAND—Below MRL2025-02-13
PFTrDAND—Below MRL2025-02-13
NEtFOSAAND—Below MRL2025-02-13
NMeFOSAAND—Below MRL2025-02-13
lithiumND—Below MRL2025-02-13
PFBSND—Below MRL2025-02-13
PFHpAND—Below MRL2025-02-13
PFHxSND10Below MRL2025-02-13
PFNAND10Below MRL2025-02-13
PFOSND4Below MRL2025-02-13
PFOAND4Below MRL2025-02-13
PFDAND—Below MRL2025-02-13
4:2 FTSND—Below MRL2025-02-13
PFHxAND—Below MRL2025-02-13
PFHpSND—Below MRL2025-02-13
11Cl-PF3OUdSND—Below MRL2025-02-13
9Cl-PF3ONSND—Below MRL2025-02-13
ADONAND—Below MRL2025-02-13
HFPO-DAND10Below MRL2025-02-13
8:2 FTSND—Below MRL2025-02-13
PFMPAND—Below MRL2025-02-13
PFPeAND—Below MRL2025-02-13
PFMBAND—Below MRL2025-02-13
PFEESAND—Below MRL2025-02-13
NFDHAND—Below MRL2025-02-13
PFPeSND—Below MRL2025-02-13
ADONAND—Below MRL2025-02-13
NMeFOSAAND—Below MRL2025-02-13
11Cl-PF3OUdSND—Below MRL2025-02-13
PFOSND4Below MRL2025-02-13
PFOAND4Below MRL2025-02-13
PFDAND—Below MRL2025-02-13
PFDoAND—Below MRL2025-02-13
PFHxAND—Below MRL2025-02-13
PFUnAND—Below MRL2025-02-13
PFHpAND—Below MRL2025-02-13
PFPeAND—Below MRL2025-08-26
4:2 FTSND—Below MRL2025-08-26
PFDoAND—Below MRL2025-08-26
8:2 FTSND—Below MRL2025-08-26
NMeFOSAAND—Below MRL2025-08-26
NEtFOSAAND—Below MRL2025-08-26
PFTrDAND—Below MRL2025-08-26
PFTAND—Below MRL2025-08-26
PFMPAND—Below MRL2025-08-26
6:2 FTSND—Below MRL2025-08-26
HFPO-DAND10Below MRL2025-08-26
ADONAND—Below MRL2025-08-26
9Cl-PF3ONSND—Below MRL2025-08-26
PFHpSND—Below MRL2025-08-26
lithiumND—Below MRL2025-08-26
PFPeSND—Below MRL2025-08-26
PFHpAND—Below MRL2025-08-26
PFEESAND—Below MRL2025-08-26
PFNAND10Below MRL2025-08-26
PFDAND—Below MRL2025-08-26
PFHxAND—Below MRL2025-08-26
PFUnAND—Below MRL2025-08-26
11Cl-PF3OUdSND—Below MRL2025-08-26
PFMBAND—Below MRL2025-08-26
NFDHAND—Below MRL2025-08-26
ADONAND—Below MRL2025-02-13
11Cl-PF3OUdSND—Below MRL2025-02-13
PFUnAND—Below MRL2025-02-13
PFHxAND—Below MRL2025-02-13
PFDoAND—Below MRL2025-02-13
9Cl-PF3ONSND—Below MRL2025-02-13
lithiumND—Below MRL2025-02-13
PFDAND—Below MRL2025-02-13
PFOAND4Below MRL2025-02-13
PFOSND4Below MRL2025-02-13
PFNAND10Below MRL2025-02-13
PFHpAND—Below MRL2025-02-13
HFPO-DAND10Below MRL2025-02-13
NMeFOSAAND—Below MRL2025-02-13
PFBSND—Below MRL2025-02-13
PFEESAND—Below MRL2025-02-13
NEtFOSAAND—Below MRL2025-02-13
PFHxSND10Below MRL2025-02-13
PFTrDAND—Below MRL2025-02-13
PFTAND—Below MRL2025-02-13
PFHpSND—Below MRL2025-02-13
NFDHAND—Below MRL2025-02-13
PFBAND—Below MRL2025-02-13
PFMBAND—Below MRL2025-02-13
PFPeAND—Below MRL2025-02-13
PFMPAND—Below MRL2025-02-13
8:2 FTSND—Below MRL2025-02-13
4:2 FTSND—Below MRL2025-02-13
6:2 FTSND—Below MRL2025-02-13
PFPeSND—Below MRL2025-02-13
lithiumND—Below MRL2025-08-26
NFDHAND—Below MRL2025-08-26
ADONAND—Below MRL2025-08-26
PFBSND—Below MRL2025-08-26
PFDAND—Below MRL2025-08-26
PFDoAND—Below MRL2025-08-26
PFHpSND—Below MRL2025-08-26
6:2 FTSND—Below MRL2025-08-26
NMeFOSAAND—Below MRL2025-08-26
HFPO-DAND10Below MRL2025-08-26
PFHpAND—Below MRL2025-08-26
PFNAND10Below MRL2025-08-26
PFMPAND—Below MRL2025-08-26
PFPeSND—Below MRL2025-08-26
PFBAND—Below MRL2025-08-26
NEtFOSAAND—Below MRL2025-08-26
PFHxAND—Below MRL2025-08-26
PFTrDAND—Below MRL2025-08-26
PFTAND—Below MRL2025-08-26
PFEESAND—Below MRL2025-08-26
PFMBAND—Below MRL2025-08-26
PFPeAND—Below MRL2025-08-26
8:2 FTSND—Below MRL2025-08-26
4:2 FTSND—Below MRL2025-08-26
9Cl-PF3ONSND—Below MRL2025-08-26
11Cl-PF3OUdSND—Below MRL2025-08-26
PFUnAND—Below MRL2025-08-26
lithiumND—Below MRL2025-02-13
PFEESAND—Below MRL2025-02-13
PFMPAND—Below MRL2025-02-13
PFPeAND—Below MRL2025-02-13
PFMBAND—Below MRL2025-02-13
4:2 FTSND—Below MRL2025-02-13
NFDHAND—Below MRL2025-02-13
PFPeSND—Below MRL2025-02-13
PFHpSND—Below MRL2025-02-13
PFTAND—Below MRL2025-02-13
PFTrDAND—Below MRL2025-02-13
NMeFOSAAND—Below MRL2025-02-13
6:2 FTSND—Below MRL2025-02-13
NEtFOSAAND—Below MRL2025-02-13
PFHpAND—Below MRL2025-02-13
PFNAND10Below MRL2025-02-13
PFBAND—Below MRL2025-02-13
8:2 FTSND—Below MRL2025-02-13
ADONAND—Below MRL2025-02-13
HFPO-DAND10Below MRL2025-02-13
PFDAND—Below MRL2025-02-13
9Cl-PF3ONSND—Below MRL2025-02-13
11Cl-PF3OUdSND—Below MRL2025-02-13
PFUnAND—Below MRL2025-02-13
PFHxAND—Below MRL2025-02-13
PFDoAND—Below MRL2025-02-13
NFDHAND—Below MRL2025-08-26
PFDAND—Below MRL2025-08-26
PFDoAND—Below MRL2025-08-26
11Cl-PF3OUdSND—Below MRL2025-08-26
9Cl-PF3ONSND—Below MRL2025-08-26
ADONAND—Below MRL2025-08-26
PFEESAND—Below MRL2025-08-26
PFMBAND—Below MRL2025-08-26
PFPeSND—Below MRL2025-08-26
PFHpSND—Below MRL2025-08-26
HFPO-DAND10Below MRL2025-08-26
PFMPAND—Below MRL2025-08-26
PFTrDAND—Below MRL2025-08-26
PFTAND—Below MRL2025-08-26
PFNAND10Below MRL2025-08-26
NEtFOSAAND—Below MRL2025-08-26
NMeFOSAAND—Below MRL2025-08-26
lithiumND—Below MRL2025-08-26
PFHpAND—Below MRL2025-08-26
4:2 FTSND—Below MRL2025-08-26
8:2 FTSND—Below MRL2025-08-26
PFBAND—Below MRL2025-08-26
PFUnAND—Below MRL2025-08-26
6:2 FTSND—Below MRL2025-08-26
lithiumND—Below MRL2025-02-13
NEtFOSAAND—Below MRL2025-02-13
NMeFOSAAND—Below MRL2025-02-13
PFBSND—Below MRL2025-02-13
PFHpAND—Below MRL2025-02-13
PFHxSND10Below MRL2025-02-13
PFNAND10Below MRL2025-02-13
PFOSND4Below MRL2025-02-13
PFOAND4Below MRL2025-02-13
PFDAND—Below MRL2025-02-13
PFDoAND—Below MRL2025-02-13
PFHxAND—Below MRL2025-02-13
PFUnAND—Below MRL2025-02-13
PFTrDAND—Below MRL2025-02-13
8:2 FTSND—Below MRL2025-02-13
PFHpSND—Below MRL2025-02-13
PFPeSND—Below MRL2025-02-13
NFDHAND—Below MRL2025-02-13
PFEESAND—Below MRL2025-02-13
PFMBAND—Below MRL2025-02-13
11Cl-PF3OUdSND—Below MRL2025-02-13
PFMPAND—Below MRL2025-02-13
9Cl-PF3ONSND—Below MRL2025-02-13
4:2 FTSND—Below MRL2025-02-13
6:2 FTSND—Below MRL2025-02-13
PFBAND—Below MRL2025-02-13
HFPO-DAND10Below MRL2025-02-13
ADONAND—Below MRL2025-02-13
PFTAND—Below MRL2025-02-13
PFPeAND—Below MRL2025-02-13
8:2 FTSND—Below MRL2025-08-26
PFHxSND10Below MRL2025-08-26
PFOSND4Below MRL2025-08-26
PFOAND4Below MRL2025-08-26
PFDAND—Below MRL2025-08-26
PFDoAND—Below MRL2025-08-26
PFHxAND—Below MRL2025-08-26
PFUnAND—Below MRL2025-08-26
9Cl-PF3ONSND—Below MRL2025-08-26
PFHpAND—Below MRL2025-08-26
ADONAND—Below MRL2025-08-26
HFPO-DAND10Below MRL2025-08-26
PFBAND—Below MRL2025-08-26
PFNAND10Below MRL2025-08-26
4:2 FTSND—Below MRL2025-08-26
11Cl-PF3OUdSND—Below MRL2025-08-26
PFMPAND—Below MRL2025-08-26
PFPeAND—Below MRL2025-08-26
PFMBAND—Below MRL2025-08-26
PFEESAND—Below MRL2025-08-26
NMeFOSAAND—Below MRL2025-08-26
NFDHAND—Below MRL2025-08-26
PFPeSND—Below MRL2025-08-26
PFHpSND—Below MRL2025-08-26
lithiumND—Below MRL2025-08-26
PFTAND—Below MRL2025-08-26
PFTrDAND—Below MRL2025-08-26
NEtFOSAAND—Below MRL2025-08-26
6:2 FTSND—Below MRL2025-08-26
PFMPAND—Below MRL2025-02-13
PFNAND10Below MRL2025-02-13
PFBAND—Below MRL2025-02-13
6:2 FTSND—Below MRL2025-02-13
4:2 FTSND—Below MRL2025-02-13
PFPeAND—Below MRL2025-02-13
PFHpAND—Below MRL2025-02-13
PFEESAND—Below MRL2025-02-13
8:2 FTSND—Below MRL2025-02-13
PFPeSND—Below MRL2025-02-13
PFHpSND—Below MRL2025-02-13
PFTAND—Below MRL2025-02-13
PFTrDAND—Below MRL2025-02-13
NEtFOSAAND—Below MRL2025-02-13
lithiumND—Below MRL2025-02-13
PFMBAND—Below MRL2025-02-13
PFDAND—Below MRL2025-02-13
NFDHAND—Below MRL2025-02-13
PFOSND4Below MRL2025-02-13
PFOAND4Below MRL2025-02-13
PFDoAND—Below MRL2025-02-13
PFHxAND—Below MRL2025-02-13
PFUnAND—Below MRL2025-02-13
9Cl-PF3ONSND—Below MRL2025-02-13
NMeFOSAAND—Below MRL2025-02-13
ADONAND—Below MRL2025-02-13
11Cl-PF3OUdSND—Below MRL2025-02-13
HFPO-DAND10Below MRL2025-02-13
NFDHAND—Below MRL2025-08-26
4:2 FTSND—Below MRL2025-08-26
8:2 FTSND—Below MRL2025-08-26
PFMPAND—Below MRL2025-08-26
NEtFOSAAND—Below MRL2025-08-26
PFPeAND—Below MRL2025-08-26
PFMBAND—Below MRL2025-08-26
PFHpSND—Below MRL2025-08-26
PFEESAND—Below MRL2025-08-26
PFPeSND—Below MRL2025-08-26
lithiumND—Below MRL2025-08-26
PFHxAND—Below MRL2025-08-26
PFBSND—Below MRL2025-08-26
PFTAND—Below MRL2025-08-26
PFTrDAND—Below MRL2025-08-26
PFHpAND—Below MRL2025-08-26
PFOAND4Below MRL2025-08-26
PFDAND—Below MRL2025-08-26
PFOSND4Below MRL2025-08-26
NMeFOSAAND—Below MRL2025-08-26
11Cl-PF3OUdSND—Below MRL2025-08-26
6:2 FTSND—Below MRL2025-08-26
PFDoAND—Below MRL2025-08-26
PFUnAND—Below MRL2025-08-26
9Cl-PF3ONSND—Below MRL2025-08-26
ADONAND—Below MRL2025-08-26
HFPO-DAND10Below MRL2025-08-26
PFBAND—Below MRL2025-08-26
PFNAND10Below MRL2025-08-26
PFPeAND—Below MRL2025-02-13
PFBAND—Below MRL2025-02-13
lithiumND—Below MRL2025-02-13
NMeFOSAAND—Below MRL2025-02-13
NEtFOSAAND—Below MRL2025-02-13
PFTrDAND—Below MRL2025-02-13
PFTAND—Below MRL2025-02-13
PFHpSND—Below MRL2025-02-13
PFPeSND—Below MRL2025-02-13
NFDHAND—Below MRL2025-02-13
PFEESAND—Below MRL2025-02-13
PFMBAND—Below MRL2025-02-13
PFMPAND—Below MRL2025-02-13
8:2 FTSND—Below MRL2025-02-13
6:2 FTSND—Below MRL2025-02-13
PFHxAND—Below MRL2025-02-13
PFHpAND—Below MRL2025-02-13
PFNAND10Below MRL2025-02-13
PFOSND4Below MRL2025-02-13
PFOAND4Below MRL2025-02-13
4:2 FTSND—Below MRL2025-02-13
PFDoAND—Below MRL2025-02-13
PFUnAND—Below MRL2025-02-13
11Cl-PF3OUdSND—Below MRL2025-02-13
9Cl-PF3ONSND—Below MRL2025-02-13
ADONAND—Below MRL2025-02-13
HFPO-DAND10Below MRL2025-02-13
PFDAND—Below MRL2025-02-13
11Cl-PF3OUdSND—Below MRL2025-08-26
HFPO-DAND10Below MRL2025-08-26
PFHxAND—Below MRL2025-08-26
PFOSND4Below MRL2025-08-26
PFOAND4Below MRL2025-08-26
PFDAND—Below MRL2025-08-26
NFDHAND—Below MRL2025-08-26
PFPeSND—Below MRL2025-08-26
PFHpSND—Below MRL2025-08-26
ADONAND—Below MRL2025-08-26
4:2 FTSND—Below MRL2025-08-26
8:2 FTSND—Below MRL2025-08-26
PFMBAND—Below MRL2025-08-26
PFDoAND—Below MRL2025-08-26
PFNAND10Below MRL2025-08-26
9Cl-PF3ONSND—Below MRL2025-08-26
PFBAND—Below MRL2025-08-26
6:2 FTSND—Below MRL2025-08-26
PFMPAND—Below MRL2025-08-26
PFPeAND—Below MRL2025-08-26
PFEESAND—Below MRL2025-08-26
PFHpAND—Below MRL2025-08-26
lithiumND—Below MRL2025-08-26
PFTAND—Below MRL2025-08-26
PFTrDAND—Below MRL2025-08-26
NEtFOSAAND—Below MRL2025-08-26
NMeFOSAAND—Below MRL2025-08-26
PFUnAND—Below MRL2025-08-26
PFBS22—2025-08-26
PFOS134Exceeds2025-02-13
PFBS10—2025-08-26
PFBS10—2025-02-13
PFOS8.54Exceeds2025-08-26
PFBS7.1—2025-02-13
PFOA5.94Exceeds2025-08-26
PFHxS5.810Detected2025-08-26
PFHxS5.610Detected2025-02-13
PFOS5.64Exceeds2025-08-26
PFOA5.64Exceeds2025-08-26
PFBA5.4—2025-08-26
6:2 FTS5.2—2025-02-13
PFOA5.14Exceeds2025-02-13
PFBS4.6—2025-02-13
PFHxS4.610Detected2025-08-26
PFBS4.5—2025-08-26
PFPeA4.5—2025-08-26
PFOS4.24Exceeds2025-08-26
PFBS4.2—2025-08-26
PFOA4.14Exceeds2025-08-26
PFHxS3.610Detected2025-08-26
PFHxA3.6—2025-08-26
PFHxS3.610Detected2025-08-26
PFHxS3.310Detected2025-08-26
PFHxS3.110Detected2025-02-13
PFHxS3.110Detected2025-02-13
PFHxS3.110Detected2025-02-13
PFBS3.1—2025-02-13

Next steps