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TENSAS WATER DISTRICT ASSOCIATION

PWS ID: LA1107009 · ST JOSEPH, Louisiana 71336

PFAS Detected

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

Population Served
3,843
Total Violations
173
Health-Based Violations
141
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
1,268
County
Tensas Parish
School/Daycare
No
MCL Violations
77
Monitoring Violations
22
Treatment Tech Violations
64

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Interim Enhanced Surface Water Treatment Rule TT 44 2025
Total Haloacetic Acids (HAA5) MCL 43 2007
TTHM MCL 26 2006
CARBON, TOTAL TT 12 2005
Total Haloacetic Acids (HAA5) MR 9 2009
TTHM MR 9 2009
Coliform (TCR) MCL 8 2015
Surface Water Treatment Rule TT 8 2022
Interim Enhanced Surface Water Treatment Rule MR 4 2022
Consumer Confidence Rule Other 2 2008

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 1 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
PFTA 9/12/2023 <0.008 µg/L 0.008 µg/L Not Detected
lithium 9/12/2023 <9 µg/L 9 µg/L Not Detected
PFTrDA 9/12/2023 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 9/12/2023 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 9/12/2023 <0.006 µg/L 0.006 µg/L Not Detected
4:2 FTS 8/11/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 8/11/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 8/11/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/11/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 8/11/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/11/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/11/2024 <0.002 µg/L 0.002 µg/L Not Detected
8:2 FTS 8/11/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 8/11/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHpS 8/11/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/11/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/11/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/11/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/11/2024 <0.004 µg/L 0.004 µg/L Not Detected
11Cl-PF3OUdS 8/11/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 8/11/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/11/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/11/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFMPA 8/11/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpA 8/11/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 8/11/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/11/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFEESA 8/11/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/11/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/11/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 6/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 6/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 6/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 6/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 6/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 6/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
lithium 6/7/2023 <9 µg/L 9 µg/L Not Detected
HFPO-DA 6/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 6/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFEESA 6/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 6/7/2023 <0.02 µg/L 0.02 µg/L Not Detected
NEtFOSAA 6/7/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 6/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 6/7/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 6/7/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFPeS 6/7/2023 <0.004 µg/L 0.004 µg/L Not Detected
ADONA 6/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 6/7/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFHpA 6/7/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 6/7/2023 <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.