PFAS Comply

PRAIRIE DU CHIEN WATERWORKS

PWSID: WI6120250 · PRAIRIE DU CHIEN, WI · Serving 6,005 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

PFOS11 ppt(MCL: 4 ppt)

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

Detection summary

2
PFAS compounds detected
11 ppt
Highest single detection
2025-06-16
Latest sample date
partial
Data completeness

All PFAS detection results

Source: EPA UCMR5 (UCMR5)

ContaminantResult (ppt)MCL (ppt)StatusSample date
8:2 FTSND—Below MRL2025-06-16
PFTAND—Below MRL2025-06-16
PFOSND4Below MRL2025-06-16
PFDoAND—Below MRL2025-06-16
PFDAND—Below MRL2025-06-16
PFOAND4Below MRL2025-06-16
PFNAND10Below MRL2025-06-16
PFHxSND10Below MRL2025-06-16
PFHpAND—Below MRL2025-06-16
PFBSND—Below MRL2025-06-16
lithiumND—Below MRL2025-06-16
NEtFOSAAND—Below MRL2025-06-16
PFPeSND—Below MRL2025-06-16
NMeFOSAAND—Below MRL2025-06-16
4:2 FTSND—Below MRL2025-06-16
PFHpSND—Below MRL2025-06-16
NFDHAND—Below MRL2025-06-16
PFTrDAND—Below MRL2025-06-16
PFMBAND—Below MRL2025-06-16
PFPeAND—Below MRL2025-06-16
PFEESAND—Below MRL2025-06-16
8:2 FTSND—Below MRL2025-06-16
PFUnAND—Below MRL2025-06-16
6:2 FTSND—Below MRL2025-06-16
PFBAND—Below MRL2025-06-16
HFPO-DAND10Below MRL2025-06-16
ADONAND—Below MRL2025-06-16
9Cl-PF3ONSND—Below MRL2025-06-16
11Cl-PF3OUdSND—Below MRL2025-06-16
PFMPAND—Below MRL2025-06-16
PFBSND—Below MRL2025-06-16
9Cl-PF3ONSND—Below MRL2025-06-16
PFHpSND—Below MRL2025-06-16
lithiumND—Below MRL2025-06-16
PFPeSND—Below MRL2025-06-16
NFDHAND—Below MRL2025-06-16
PFEESAND—Below MRL2025-06-16
PFMBAND—Below MRL2025-06-16
PFPeAND—Below MRL2025-06-16
PFMPAND—Below MRL2025-06-16
8:2 FTSND—Below MRL2025-06-16
4:2 FTSND—Below MRL2025-06-16
6:2 FTSND—Below MRL2025-06-16
PFBAND—Below MRL2025-06-16
PFUnAND—Below MRL2025-06-16
ADONAND—Below MRL2025-06-16
PFTAND—Below MRL2025-06-16
PFHpAND—Below MRL2025-06-16
11Cl-PF3OUdSND—Below MRL2025-06-16
PFHxAND—Below MRL2025-06-16
PFDoAND—Below MRL2025-06-16
PFDAND—Below MRL2025-06-16
PFOAND4Below MRL2025-06-16
PFOSND4Below MRL2025-06-16
PFNAND10Below MRL2025-06-16
PFUnAND—Below MRL2025-06-16
PFHpSND—Below MRL2025-06-16
PFHxAND—Below MRL2025-06-16
NMeFOSAAND—Below MRL2025-06-16
NEtFOSAAND—Below MRL2025-06-16
PFTrDAND—Below MRL2025-06-16
HFPO-DAND10Below MRL2025-06-16
PFEESAND—Below MRL2025-06-16
NEtFOSAAND—Below MRL2025-06-16
PFTrDAND—Below MRL2025-06-16
NMeFOSAAND—Below MRL2025-06-16
PFTAND—Below MRL2025-06-16
PFHxAND—Below MRL2025-06-16
lithiumND—Below MRL2025-06-16
PFHpAND—Below MRL2025-06-16
PFNAND10Below MRL2025-06-16
PFOAND4Below MRL2025-06-16
PFDAND—Below MRL2025-06-16
PFDoAND—Below MRL2025-06-16
NFDHAND—Below MRL2025-06-16
6:2 FTSND—Below MRL2025-06-16
PFMBAND—Below MRL2025-06-16
PFBSND—Below MRL2025-06-16
PFPeSND—Below MRL2025-06-16
PFMPAND—Below MRL2025-06-16
4:2 FTSND—Below MRL2025-06-16
PFPeAND—Below MRL2025-06-16
PFBAND—Below MRL2025-06-16
HFPO-DAND10Below MRL2025-06-16
ADONAND—Below MRL2025-06-16
9Cl-PF3ONSND—Below MRL2025-06-16
11Cl-PF3OUdSND—Below MRL2025-06-16
PFOS114Exceeds2025-06-16
PFHxS4.710Detected2025-06-16
PFHxS3.510Detected2025-06-16

Next steps