PFAS Comply

PURISSIMA HILLS WATER DISTRICT

PWSID: CA4310021 · LOS ALTOS HILLS, CA · Serving 6,245 people

Type: CWSOwner: LSource: SW
Compliant

All PFAS compounds below EPA Maximum Contaminant Levels.

Key contaminants vs MCL

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

Detection summary

0
PFAS compounds detected
N/A ppt
Highest single detection
2025-09-16
Latest sample date
partial
Data completeness

All PFAS detection results

Source: EPA UCMR5 (UCMR5)

ContaminantResult (ppt)MCL (ppt)StatusSample date
11Cl-PF3OUdSND—Below MRL2025-03-10
9Cl-PF3ONSND—Below MRL2025-03-10
ADONAND—Below MRL2025-03-10
HFPO-DAND10Below MRL2025-03-10
PFBAND—Below MRL2025-03-10
6:2 FTSND—Below MRL2025-03-10
4:2 FTSND—Below MRL2025-03-10
PFHpSND—Below MRL2025-03-10
PFUnAND—Below MRL2025-03-10
NMeFOSAAND—Below MRL2025-03-10
PFDAND—Below MRL2025-03-10
PFTAND—Below MRL2025-03-10
PFTrDAND—Below MRL2025-03-10
NEtFOSAAND—Below MRL2025-03-10
8:2 FTSND—Below MRL2025-03-10
PFHpAND—Below MRL2025-03-10
PFDoAND—Below MRL2025-03-10
lithiumND—Below MRL2025-03-10
PFMBAND—Below MRL2025-03-10
PFHxAND—Below MRL2025-03-10
PFPeSND—Below MRL2025-03-10
PFMPAND—Below MRL2025-03-10
PFBSND—Below MRL2025-03-10
PFHxSND10Below MRL2025-03-10
PFNAND10Below MRL2025-03-10
PFOSND4Below MRL2025-03-10
PFOAND4Below MRL2025-03-10
NFDHAND—Below MRL2025-03-10
PFEESAND—Below MRL2025-03-10
PFPeAND—Below MRL2025-03-10
PFHxAND—Below MRL2025-06-09
11Cl-PF3OUdSND—Below MRL2025-06-09
6:2 FTSND—Below MRL2025-06-09
PFDoAND—Below MRL2025-06-09
PFDAND—Below MRL2025-06-09
PFOAND4Below MRL2025-06-09
9Cl-PF3ONSND—Below MRL2025-06-09
ADONAND—Below MRL2025-06-09
PFBAND—Below MRL2025-06-09
PFPeAND—Below MRL2025-06-09
PFMPAND—Below MRL2025-06-09
8:2 FTSND—Below MRL2025-06-09
4:2 FTSND—Below MRL2025-06-09
PFMBAND—Below MRL2025-06-09
PFOSND4Below MRL2025-06-09
HFPO-DAND10Below MRL2025-06-09
PFTAND—Below MRL2025-06-09
PFUnAND—Below MRL2025-06-09
lithiumND—Below MRL2025-06-09
PFNAND10Below MRL2025-06-09
NMeFOSAAND—Below MRL2025-06-09
PFEESAND—Below MRL2025-06-09
PFTrDAND—Below MRL2025-06-09
NFDHAND—Below MRL2025-06-09
PFPeSND—Below MRL2025-06-09
PFHpSND—Below MRL2025-06-09
PFBSND—Below MRL2025-06-09
PFHpAND—Below MRL2025-06-09
PFHxSND10Below MRL2025-06-09
NEtFOSAAND—Below MRL2025-06-09
PFPeSND—Below MRL2025-09-16
PFTAND—Below MRL2025-09-16
PFOSND4Below MRL2025-09-16
PFNAND10Below MRL2025-09-16
PFHxSND10Below MRL2025-09-16
PFHpAND—Below MRL2025-09-16
NMeFOSAAND—Below MRL2025-09-16
PFHpSND—Below MRL2025-09-16
PFTrDAND—Below MRL2025-09-16
PFDAND—Below MRL2025-09-16
lithiumND—Below MRL2025-09-16
PFBSND—Below MRL2025-09-16
NEtFOSAAND—Below MRL2025-09-16
HFPO-DAND10Below MRL2025-09-16
6:2 FTSND—Below MRL2025-09-16
4:2 FTSND—Below MRL2025-09-16
8:2 FTSND—Below MRL2025-09-16
PFMPAND—Below MRL2025-09-16
PFPeAND—Below MRL2025-09-16
PFEESAND—Below MRL2025-09-16
ADONAND—Below MRL2025-09-16
NFDHAND—Below MRL2025-09-16
9Cl-PF3ONSND—Below MRL2025-09-16
11Cl-PF3OUdSND—Below MRL2025-09-16
PFUnAND—Below MRL2025-09-16
PFHxAND—Below MRL2025-09-16
PFDoAND—Below MRL2025-09-16
PFOAND4Below MRL2025-09-16
PFMBAND—Below MRL2025-09-16
PFBAND—Below MRL2025-09-16

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