PlainWater
States → California

CITY OF SAN JOSE - NSJ/ALVISO

PWS ID: CA4310019 · SAN JOSE, California 95113

PFAS Detected

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

Population Served
45,559
Total Violations
10
Health-Based Violations
9
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
2,206
County
Santa Clara
School/Daycare
No
MCL Violations
2
Monitoring Violations
1
Treatment Tech Violations
7

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule TT 7 1995
Coliform (TCR) MCL 2 2008
Coliform (TCR) MR 1 2005

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 3 of 215 samples detected PFAS.

Contaminant Date Result MRL Status
PFTrDA 9/5/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFPeA 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 9/5/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 9/5/2023 <0.004 µg/L 0.004 µg/L Not Detected
NMeFOSAA 9/5/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFTA 9/5/2023 <0.008 µg/L 0.008 µg/L Not Detected
NEtFOSAA 9/5/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 9/5/2023 <0.004 µg/L 0.004 µg/L Not Detected
ADONA 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
lithium 9/5/2023 9.2000 µg/L 9 µg/L Detected
PFHpS 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 9/5/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 9/5/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFBA 9/5/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFDA 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 9/5/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 9/5/2023 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 9/5/2023 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 9/5/2023 <0.002 µg/L 0.002 µg/L Not Detected
HFPO-DA 9/5/2023 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 9/5/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 9/5/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 9/5/2023 <0.002 µg/L 0.002 µg/L Not Detected
lithium 9/5/2023 <9 µg/L 9 µg/L Not Detected
PFHpA 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 9/5/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 9/5/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 9/5/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFDoA 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 9/5/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 9/5/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 9/5/2023 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 9/5/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 9/5/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 9/5/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 9/5/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 9/5/2023 <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.