PFAS Comply

NPS-MOUNT RUSHMORE NATIONAL MEMORIAL

PWSID: SD4680046 · KEYSTONE, SD · Serving 4,100 people

Type: NTNCWSOwner: FSource: 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

PFOS10.6 ppt(MCL: 4 ppt)

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

Detection summary

4
PFAS compounds detected
33700 ppt
Highest single detection
2023-06-14
Latest sample date
partial
Data completeness

All PFAS detection results

Source: EPA UCMR5 (UCMR5)

ContaminantResult (ppt)MCL (ppt)StatusSample date
PFBAND—Below MRL2023-11-07
8:2 FTSND—Below MRL2023-06-14
PFEESAND—Below MRL2023-11-07
NFDHAND—Below MRL2023-11-07
PFPeSND—Below MRL2023-11-07
PFHpSND—Below MRL2023-11-07
PFTAND—Below MRL2023-11-07
PFBSND—Below MRL2023-11-07
NMeFOSAAND—Below MRL2023-06-14
PFHpAND—Below MRL2023-06-14
NEtFOSAAND—Below MRL2023-06-14
PFTAND—Below MRL2023-06-14
PFNAND10Below MRL2023-06-14
PFOAND4Below MRL2023-06-14
PFDAND—Below MRL2023-06-14
9Cl-PF3ONSND—Below MRL2023-06-14
ADONAND—Below MRL2023-06-14
HFPO-DAND10Below MRL2023-06-14
PFBAND—Below MRL2023-06-14
PFTrDAND—Below MRL2023-06-14
PFPeSND—Below MRL2023-06-14
11Cl-PF3OUdSND—Below MRL2023-06-14
PFUnAND—Below MRL2023-06-14
PFHxAND—Below MRL2023-06-14
6:2 FTSND—Below MRL2023-06-14
PFHpSND—Below MRL2023-06-14
4:2 FTSND—Below MRL2023-06-14
NFDHAND—Below MRL2023-06-14
PFEESAND—Below MRL2023-06-14
PFMBAND—Below MRL2023-06-14
PFPeAND—Below MRL2023-06-14
PFMPAND—Below MRL2023-06-14
PFDoAND—Below MRL2023-06-14
PFTrDAND—Below MRL2023-11-07
4:2 FTSND—Below MRL2023-11-07
PFHpAND—Below MRL2023-11-07
PFNAND10Below MRL2023-11-07
PFOAND4Below MRL2023-11-07
PFDAND—Below MRL2023-11-07
PFDoAND—Below MRL2023-11-07
PFHxAND—Below MRL2023-11-07
PFUnAND—Below MRL2023-11-07
11Cl-PF3OUdSND—Below MRL2023-11-07
9Cl-PF3ONSND—Below MRL2023-11-07
ADONAND—Below MRL2023-11-07
HFPO-DAND10Below MRL2023-11-07
NMeFOSAAND—Below MRL2023-11-07
6:2 FTSND—Below MRL2023-11-07
NEtFOSAAND—Below MRL2023-11-07
8:2 FTSND—Below MRL2023-11-07
PFMPAND—Below MRL2023-11-07
PFPeAND—Below MRL2023-11-07
PFMBAND—Below MRL2023-11-07
lithium33700—2023-05-03
lithium29500—2023-11-07
PFHxS20.810Exceeds2023-06-14
PFOS10.64Exceeds2024-03-18
PFHxS10.510Exceeds2024-03-18
PFOS9.84Exceeds2023-06-14
PFBS3.2—2023-06-14

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