PlainWater
States → Washington

KENNEWICK CITY OF

PWS ID: WA5338100 · Kennewick, Washington 99336

PFAS Detected

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

Population Served
114,468
Total Violations
7
Health-Based Violations
1
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
36,947
County
Benton
School/Daycare
No
MCL Violations
1
Monitoring Violations
5
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MR 2 2023
Total Haloacetic Acids (HAA5) MR 2 2023
Coliform (TCR) MCL 1 1993
Gross Alpha, Excl. Radon and U MR 1 1979
Consumer Confidence Rule Other 1 2016

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 23 of 240 samples detected PFAS.

Contaminant Date Result MRL Status
PFPeS 8/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 8/7/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFBS 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 8/7/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFTrDA 8/7/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFPeA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 8/7/2023 <0.008 µg/L 0.008 µg/L Not Detected
4:2 FTS 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 8/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFMPA 8/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
NEtFOSAA 8/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
lithium 8/7/2023 <9 µg/L 9 µg/L Not Detected
PFNA 8/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 8/7/2023 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 8/7/2023 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 8/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFOA 8/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/7/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFNA 8/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 8/7/2023 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 8/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 8/7/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 8/7/2023 <0.008 µg/L 0.008 µg/L Not Detected
lithium 8/7/2023 <9 µg/L 9 µg/L Not Detected
PFBS 8/7/2023 0.0050 µg/L 0.003 µg/L Detected
PFPeS 8/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 8/7/2023 0.0091 µg/L 0.003 µg/L Detected
PFOS 8/7/2023 0.0105 µg/L 0.004 µg/L Detected
PFOA 8/7/2023 0.0046 µg/L 0.004 µg/L Detected
PFDA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/7/2023 0.0075 µg/L 0.003 µg/L Detected
PFMPA 8/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 8/7/2023 <0.005 µg/L 0.005 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.