PlainWater
States → California

VALLEY WATER CO.

PWS ID: CA1910166 · LA CANADA FLINTRIDGE, California 91011

PFAS Detected

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

Population Served
10,070
Total Violations
4
Health-Based Violations
4
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
3,611
County
Los Angeles
School/Daycare
No
MCL Violations
4
Monitoring Violations
0
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 4 1994

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
NEtFOSAA 9/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 9/7/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFTA 9/7/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 9/7/2023 <0.007 µg/L 0.007 µg/L Not Detected
lithium 8/2/2023 26.0000 µg/L 9 µg/L Detected
PFBA 8/2/2023 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 8/2/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFOS 8/2/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 8/2/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 8/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 8/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 8/2/2023 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/2/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 8/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 8/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 8/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 8/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/2/2023 <0.002 µg/L 0.002 µg/L Not Detected
NFDHA 8/2/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFNA 8/2/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFMBA 8/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/2/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/2/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 8/2/2023 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 8/2/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFPeS 8/2/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 5/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 5/15/2024 <0.002 µg/L 0.002 µg/L Not Detected
NMeFOSAA 5/15/2024 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 5/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 5/15/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 5/15/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFHpS 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 5/15/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 5/15/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 5/15/2024 <0.004 µg/L 0.004 µg/L Not Detected
4:2 FTS 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 5/15/2024 34.6000 µg/L 9 µg/L Detected
ADONA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 5/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
11Cl-PF3OUdS 5/15/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 5/15/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 5/15/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 5/15/2024 <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.