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States → Washington

CROSS VALLEY WATER DISTRICT

PWS ID: WA5316270 · Snohomish, Washington 98296

PFAS Detected

3 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
23,054
Total Violations
33
Health-Based Violations
1
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
7,122
County
Snohomish
School/Daycare
No
MCL Violations
1
Monitoring Violations
29
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Aldicarb MR 5 2008
OXAMYL MR 5 2008
Aldicarb sulfone MR 5 2008
Aldicarb sulfoxide MR 5 2008
Carbofuran MR 5 2008
Consumer Confidence Rule Other 2 2017
Coliform (TCR) MCL 1 1993
Coliform (TCR) MR 1 1997
Lead and Copper Rule MR 1 1998
TTHM MR 1 2020
Total Haloacetic Acids (HAA5) MR 1 2020

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 6 of 420 samples detected PFAS.

Contaminant Date Result MRL Status
PFHxS 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/5/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 8/5/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/5/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 8/5/2024 <0.004 µg/L 0.004 µg/L Not Detected
ADONA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 8/5/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFEESA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 8/5/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 8/5/2024 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 8/5/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFHpS 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
NFDHA 8/5/2024 <0.02 µg/L 0.02 µg/L Not Detected
HFPO-DA 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMBA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/5/2024 <0.004 µg/L 0.004 µg/L Not Detected
lithium 8/5/2024 <9 µg/L 9 µg/L Not Detected
4:2 FTS 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFPeS 8/5/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDoA 5/14/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 5/14/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 5/14/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 5/14/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 5/14/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 5/14/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 5/14/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/14/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 5/14/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 5/14/2024 <0.002 µg/L 0.002 µg/L Not Detected
NMeFOSAA 5/14/2024 <0.006 µg/L 0.006 µg/L Not Detected
lithium 5/14/2024 <9 µg/L 9 µg/L Not Detected
NEtFOSAA 5/14/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 5/14/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFMPA 5/14/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFMBA 5/14/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 5/14/2024 <0.005 µg/L 0.005 µg/L Not Detected
NFDHA 5/14/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 5/14/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 5/14/2024 <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.