PFAS Comply

RAPID VALLEY SANITARY DISTRICT

PWSID: SD4600274 · RAPID CITY, SD · Serving 11,408 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

PFOS5.7 ppt(MCL: 4 ppt)

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

Detection summary

3
PFAS compounds detected
23400 ppt
Highest single detection
2024-09-03
Latest sample date
partial
Data completeness

All PFAS detection results

Source: EPA UCMR5 (UCMR5)

ContaminantResult (ppt)MCL (ppt)StatusSample date
PFPeAND—Below MRL2024-09-03
PFPeAND—Below MRL2024-03-18
PFMPAND—Below MRL2024-03-18
NFDHAND—Below MRL2024-03-18
PFEESAND—Below MRL2024-03-18
PFPeSND—Below MRL2024-03-18
PFHpSND—Below MRL2024-03-18
8:2 FTSND—Below MRL2024-03-18
NEtFOSAAND—Below MRL2024-03-18
4:2 FTSND—Below MRL2024-03-18
PFTrDAND—Below MRL2024-03-18
PFTAND—Below MRL2024-03-18
NMeFOSAAND—Below MRL2024-03-18
PFDAND—Below MRL2024-03-18
4:2 FTSND—Below MRL2024-12-02
8:2 FTSND—Below MRL2024-12-02
PFBAND—Below MRL2024-12-02
HFPO-DAND10Below MRL2024-12-02
ADONAND—Below MRL2024-12-02
9Cl-PF3ONSND—Below MRL2024-12-02
11Cl-PF3OUdSND—Below MRL2024-12-02
PFBSND—Below MRL2024-03-18
PFHpAND—Below MRL2024-03-18
PFNAND10Below MRL2024-03-18
PFOAND4Below MRL2024-03-18
PFDoAND—Below MRL2024-03-18
PFHxAND—Below MRL2024-03-18
PFUnAND—Below MRL2024-03-18
11Cl-PF3OUdSND—Below MRL2024-03-18
9Cl-PF3ONSND—Below MRL2024-03-18
ADONAND—Below MRL2024-03-18
PFBAND—Below MRL2024-03-18
6:2 FTSND—Below MRL2024-03-18
HFPO-DAND10Below MRL2024-03-18
PFOSND4Below MRL2024-03-18
6:2 FTSND—Below MRL2024-06-17
PFDAND—Below MRL2024-06-17
PFDoAND—Below MRL2024-06-17
PFHxAND—Below MRL2024-06-17
PFUnAND—Below MRL2024-06-17
11Cl-PF3OUdSND—Below MRL2024-06-17
9Cl-PF3ONSND—Below MRL2024-06-17
ADONAND—Below MRL2024-06-17
HFPO-DAND10Below MRL2024-06-17
PFOSND4Below MRL2024-06-17
PFBSND—Below MRL2024-06-17
4:2 FTSND—Below MRL2024-06-17
PFBAND—Below MRL2024-06-17
8:2 FTSND—Below MRL2024-06-17
PFMPAND—Below MRL2024-06-17
PFOAND4Below MRL2024-06-17
PFPeAND—Below MRL2024-06-17
PFMBAND—Below MRL2024-06-17
PFEESAND—Below MRL2024-06-17
NFDHAND—Below MRL2024-06-17
PFPeSND—Below MRL2024-06-17
PFNAND10Below MRL2024-06-17
NEtFOSAAND—Below MRL2024-06-17
PFHpSND—Below MRL2024-06-17
PFHpAND—Below MRL2024-06-17
NMeFOSAAND—Below MRL2024-06-17
PFTrDAND—Below MRL2024-06-17
PFTAND—Below MRL2024-06-17
PFOAND4Below MRL2024-09-03
PFOSND4Below MRL2024-09-03
PFNAND10Below MRL2024-09-03
PFDAND—Below MRL2024-09-03
PFTrDAND—Below MRL2024-09-03
NEtFOSAAND—Below MRL2024-09-03
NMeFOSAAND—Below MRL2024-09-03
lithiumND—Below MRL2024-09-03
PFBSND—Below MRL2024-09-03
PFTAND—Below MRL2024-09-03
PFHpSND—Below MRL2024-09-03
PFPeSND—Below MRL2024-09-03
NFDHAND—Below MRL2024-09-03
PFEESAND—Below MRL2024-09-03
HFPO-DAND10Below MRL2024-09-03
PFHxAND—Below MRL2024-09-03
PFUnAND—Below MRL2024-09-03
11Cl-PF3OUdSND—Below MRL2024-09-03
PFHpAND—Below MRL2024-09-03
PFMBAND—Below MRL2024-09-03
PFDoAND—Below MRL2024-09-03
ADONAND—Below MRL2024-09-03
9Cl-PF3ONSND—Below MRL2024-09-03
PFBAND—Below MRL2024-09-03
6:2 FTSND—Below MRL2024-09-03
4:2 FTSND—Below MRL2024-09-03
8:2 FTSND—Below MRL2024-09-03
PFMPAND—Below MRL2024-09-03
PFMBAND—Below MRL2024-03-18
PFMBAND—Below MRL2024-12-02
NFDHAND—Below MRL2024-12-02
PFPeSND—Below MRL2024-12-02
PFEESAND—Below MRL2024-12-02
PFHpSND—Below MRL2024-12-02
PFTrDAND—Below MRL2024-12-02
PFTAND—Below MRL2024-12-02
lithiumND—Below MRL2024-12-02
PFPeAND—Below MRL2024-12-02
NEtFOSAAND—Below MRL2024-12-02
PFNAND10Below MRL2024-12-02
NMeFOSAAND—Below MRL2024-12-02
PFMPAND—Below MRL2024-12-02
PFOAND4Below MRL2024-12-02
PFDAND—Below MRL2024-12-02
PFDoAND—Below MRL2024-12-02
PFHxAND—Below MRL2024-12-02
PFHpAND—Below MRL2024-12-02
PFBSND—Below MRL2024-12-02
6:2 FTSND—Below MRL2024-12-02
PFUnAND—Below MRL2024-12-02
lithium23400—2024-03-18
lithium14000—2024-06-17
PFHxS5.810Detected2024-06-17
PFOS5.74Exceeds2024-12-02
PFHxS3.810Detected2024-03-18
PFHxS3.610Detected2024-09-03
PFHxS3.310Detected2024-12-02

Next steps