PFAS Comply

KING COUNTY WATER DISTRICT #20

PWSID: WA5338950 · Seattle, WA · Serving 38,974 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
2024-09-10
Latest sample date
partial
Data completeness

All PFAS detection results

Source: EPA UCMR5 (UCMR5)

ContaminantResult (ppt)MCL (ppt)StatusSample date
HFPO-DAND10Below MRL2024-03-11
PFEESAND—Below MRL2024-03-11
lithiumND—Below MRL2024-03-11
NMeFOSAAND—Below MRL2024-03-11
NEtFOSAAND—Below MRL2024-03-11
PFTrDAND—Below MRL2024-03-11
PFTAND—Below MRL2024-03-11
PFHpSND—Below MRL2024-03-11
PFPeSND—Below MRL2024-03-11
NFDHAND—Below MRL2024-03-11
4:2 FTSND—Below MRL2024-03-11
PFBSND—Below MRL2024-03-11
PFHpAND—Below MRL2024-03-11
PFHxSND10Below MRL2024-03-11
PFNAND10Below MRL2024-03-11
9Cl-PF3ONSND—Below MRL2024-03-11
PFOSND4Below MRL2024-03-11
PFPeAND—Below MRL2024-03-11
PFMPAND—Below MRL2024-03-11
8:2 FTSND—Below MRL2024-03-11
6:2 FTSND—Below MRL2024-03-11
PFBAND—Below MRL2024-03-11
ADONAND—Below MRL2024-03-11
11Cl-PF3OUdSND—Below MRL2024-03-11
PFUnAND—Below MRL2024-03-11
PFOAND4Below MRL2024-03-11
PFDAND—Below MRL2024-03-11
PFHxAND—Below MRL2024-03-11
PFMBAND—Below MRL2024-03-11
PFDoAND—Below MRL2024-03-11
PFPeAND—Below MRL2024-06-12
PFBSND—Below MRL2024-06-12
PFOAND4Below MRL2024-06-12
PFHxSND10Below MRL2024-06-12
PFTAND—Below MRL2024-06-12
PFOSND4Below MRL2024-06-12
PFDAND—Below MRL2024-06-12
PFNAND10Below MRL2024-06-12
PFHpAND—Below MRL2024-06-12
4:2 FTSND—Below MRL2024-06-12
8:2 FTSND—Below MRL2024-06-12
PFMPAND—Below MRL2024-06-12
NEtFOSAAND—Below MRL2024-06-12
PFPeSND—Below MRL2024-06-12
NMeFOSAAND—Below MRL2024-06-12
PFMBAND—Below MRL2024-06-12
lithiumND—Below MRL2024-06-12
PFHpSND—Below MRL2024-06-12
PFTrDAND—Below MRL2024-06-12
NFDHAND—Below MRL2024-06-12
PFEESAND—Below MRL2024-06-12
11Cl-PF3OUdSND—Below MRL2024-06-12
PFDoAND—Below MRL2024-06-12
PFUnAND—Below MRL2024-06-12
PFHxAND—Below MRL2024-06-12
6:2 FTSND—Below MRL2024-06-12
PFBAND—Below MRL2024-06-12
HFPO-DAND10Below MRL2024-06-12
ADONAND—Below MRL2024-06-12
9Cl-PF3ONSND—Below MRL2024-06-12
NEtFOSAAND—Below MRL2024-09-10
NMeFOSAAND—Below MRL2024-09-10
PFTAND—Below MRL2024-09-10
PFTrDAND—Below MRL2024-09-10
PFHxAND—Below MRL2024-09-10
lithiumND—Below MRL2024-09-10
PFBSND—Below MRL2024-09-10
PFHpAND—Below MRL2024-09-10
PFMPAND—Below MRL2024-09-10
PFMBAND—Below MRL2024-09-10
PFEESAND—Below MRL2024-09-10
NFDHAND—Below MRL2024-09-10
PFPeSND—Below MRL2024-09-10
PFHxSND10Below MRL2024-09-10
PFNAND10Below MRL2024-09-10
PFOSND4Below MRL2024-09-10
PFOAND4Below MRL2024-09-10
PFDAND—Below MRL2024-09-10
PFHpSND—Below MRL2024-09-10
PFBAND—Below MRL2024-09-10
PFPeAND—Below MRL2024-09-10
8:2 FTSND—Below MRL2024-09-10
PFDoAND—Below MRL2024-09-10
6:2 FTSND—Below MRL2024-09-10
HFPO-DAND10Below MRL2024-09-10
ADONAND—Below MRL2024-09-10
9Cl-PF3ONSND—Below MRL2024-09-10
11Cl-PF3OUdSND—Below MRL2024-09-10
PFUnAND—Below MRL2024-09-10
4:2 FTSND—Below MRL2024-09-10
PFHpSND—Below MRL2024-12-04
8:2 FTSND—Below MRL2024-12-04
NMeFOSAAND—Below MRL2024-12-04
NEtFOSAAND—Below MRL2024-12-04
PFTrDAND—Below MRL2024-12-04
PFTAND—Below MRL2024-12-04
PFOSND4Below MRL2024-12-04
PFPeAND—Below MRL2024-12-04
PFPeSND—Below MRL2024-12-04
lithiumND—Below MRL2024-12-04
PFBSND—Below MRL2024-12-04
PFHpAND—Below MRL2024-12-04
PFNAND10Below MRL2024-12-04
PFOAND4Below MRL2024-12-04
PFDAND—Below MRL2024-12-04
PFDoAND—Below MRL2024-12-04
PFHxAND—Below MRL2024-12-04
PFUnAND—Below MRL2024-12-04
PFEESAND—Below MRL2024-12-04
PFHxSND10Below MRL2024-12-04
NFDHAND—Below MRL2024-12-04
11Cl-PF3OUdSND—Below MRL2024-12-04
PFMBAND—Below MRL2024-12-04
PFMPAND—Below MRL2024-12-04
4:2 FTSND—Below MRL2024-12-04
6:2 FTSND—Below MRL2024-12-04
PFBAND—Below MRL2024-12-04
HFPO-DAND10Below MRL2024-12-04
ADONAND—Below MRL2024-12-04
9Cl-PF3ONSND—Below MRL2024-12-04

Next steps