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States → Washington

KING COUNTY WATER DISTRICT #54

PWS ID: WA5339950 · Des Moines, Washington 98189

Population Served
5,037
Total Violations
20
Health-Based Violations
6
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
2,175
County
King
School/Daycare
No
MCL Violations
6
Monitoring Violations
11
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 9 2003
Coliform (TCR) MCL 4 2013
Consumer Confidence Rule Other 2 2012
Revised Total Coliform Rule MCL 2 2023
Gross Alpha, Excl. Radon and U MR 1 1979
Coliform (TCR) MR 1 1991

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 119 samples detected PFAS.

Contaminant Date Result MRL Status
NEtFOSAA 8/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 8/18/2025 <0.002 µg/L 0.002 µg/L Not Detected
lithium 8/18/2025 <9 µg/L 9 µg/L Not Detected
PFEESA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 8/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 8/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
11Cl-PF3OUdS 8/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
NFDHA 8/18/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFHxA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 8/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 8/18/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFTrDA 8/18/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 8/18/2025 <0.008 µg/L 0.008 µg/L Not Detected
9Cl-PF3ONS 8/18/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFMBA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 5/19/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 5/19/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 5/19/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 5/19/2025 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 5/19/2025 <0.002 µg/L 0.002 µg/L Not Detected
NMeFOSAA 5/19/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFOA 5/19/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFTrDA 5/19/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 5/19/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFEESA 5/19/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 5/19/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 5/19/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 5/19/2025 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 5/19/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/19/2025 <0.003 µg/L 0.003 µg/L Not Detected
lithium 5/19/2025 <9 µg/L 9 µg/L Not Detected
HFPO-DA 5/19/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/19/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 5/19/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/19/2025 <0.003 µg/L 0.003 µg/L Not Detected
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.