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States → California

SOUTH TAHOE PUD - MAIN

PWS ID: CA0910002 · SOUTH LAKE TAHOE, California 96150

PFAS Detected

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

Population Served
100,000
Total Violations
13
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
14,125
County
El Dorado
School/Daycare
No
MCL Violations
6
Monitoring Violations
3
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 3 2008
Coliform (TCR) MCL 2 1993
Combined Uranium MR 2 1990
Arsenic MR 1 2008
Tetrachloroethylene MCL 1 1990

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 25 of 804 samples detected PFAS.

Contaminant Date Result MRL Status
PFTA 9/7/2023 <0.008 µg/L 0.008 µg/L Not Detected
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
PFTrDA 9/7/2023 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 9/7/2023 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 9/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 9/7/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 9/7/2023 <0.008 µg/L 0.008 µg/L Not Detected
lithium 9/6/2023 <9 µg/L 9 µg/L Not Detected
PFTA 9/6/2023 <0.008 µg/L 0.008 µg/L Not Detected
NMeFOSAA 9/6/2023 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 9/6/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 9/6/2023 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 9/6/2023 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 9/6/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 9/6/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 9/6/2023 <0.008 µg/L 0.008 µg/L Not Detected
lithium 9/6/2023 <9 µg/L 9 µg/L Not Detected
PFTrDA 9/6/2023 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 9/6/2023 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 9/6/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTA 9/6/2023 <0.008 µg/L 0.008 µg/L Not Detected
lithium 9/6/2023 <9 µg/L 9 µg/L Not Detected
PFTA 9/5/2023 <0.008 µg/L 0.008 µg/L Not Detected
NMeFOSAA 9/5/2023 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 9/5/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 9/5/2023 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 9/5/2023 <0.005 µg/L 0.005 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
PFTrDA 9/5/2023 <0.007 µg/L 0.007 µg/L Not Detected
NFDHA 9/27/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFBA 9/27/2023 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 9/27/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 9/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 9/27/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 9/27/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 9/27/2023 0.0120 µg/L 0.003 µg/L Detected
PFHpS 9/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 9/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 9/27/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 9/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 9/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 9/27/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHxA 9/27/2023 0.0113 µg/L 0.003 µg/L Detected
HFPO-DA 9/27/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 9/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 9/27/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 9/27/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 9/27/2023 <0.004 µg/L 0.004 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.