PlainWater
States → Washington

SNOQUALMIE WATER

PWS ID: WA5381080 · SNOQUALIME, Washington 98065

Population Served
15,848
Total Violations
39
Health-Based Violations
10
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
5,386
County
King
School/Daycare
No
MCL Violations
10
Monitoring Violations
24
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 10 2003
Lead and Copper Rule MR 10 2007
Consumer Confidence Rule Other 5 2016
1,2-DIBROMO-3-CHLOROPROPANE MR 4 2007
ETHYLENE DIBROMIDE MR 4 2007
Diquat MR 4 2007
Coliform (TCR) MR 1 1992
Gross Alpha, Excl. Radon and U MR 1 1979

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
9Cl-PF3ONS 5/31/2023 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 5/31/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/31/2023 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 5/31/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/31/2023 <0.005 µg/L 0.005 µg/L Not Detected
11Cl-PF3OUdS 5/31/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFPeA 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 5/31/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFMBA 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 5/31/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFPeS 5/31/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFMPA 5/31/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFTrDA 5/31/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFHxS 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
lithium 5/31/2023 <9 µg/L 9 µg/L Not Detected
NEtFOSAA 5/31/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 5/31/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFDA 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 5/31/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFDoA 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 5/31/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 5/31/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 5/31/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 5/31/2023 <0.004 µg/L 0.004 µg/L Not Detected
NEtFOSAA 5/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 5/3/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFEESA 5/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 5/3/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 5/3/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFDoA 5/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 5/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 5/3/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 5/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 5/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 5/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 5/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 5/3/2023 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 5/3/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 5/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/3/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 5/3/2023 <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.