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States → Louisiana

COUSHATTA WATER SYSTEM

PWS ID: LA1081001 · COUSHATTA, Louisiana 71019

PFAS Detected

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

Population Served
3,300
Total Violations
51
Health-Based Violations
30
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
1,100
County
Red River Parish
School/Daycare
No
MCL Violations
5
Monitoring Violations
16
Treatment Tech Violations
25

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Groundwater Rule TT 25 2025
Total Haloacetic Acids (HAA5) MR 8 2013
TTHM MR 8 2013
Coliform (TCR) MCL 5 2009
Consumer Confidence Rule Other 1 1999

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 2 of 60 samples detected PFAS.

Contaminant Date Result MRL Status
NFDHA 7/29/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFMBA 7/29/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 7/29/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 7/29/2024 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 7/29/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 7/29/2024 <0.006 µg/L 0.006 µg/L Not Detected
9Cl-PF3ONS 7/29/2024 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 7/29/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 7/29/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 7/29/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 7/29/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 7/29/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 7/29/2024 <0.005 µg/L 0.005 µg/L Not Detected
lithium 7/29/2024 44.6000 µg/L 9 µg/L Detected
PFPeA 7/29/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 7/29/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 7/29/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxA 7/29/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 7/29/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 7/29/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 7/29/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 7/29/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 7/29/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 7/29/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 7/29/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 7/29/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 7/29/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 7/29/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFMPA 7/29/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 7/29/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 2/14/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 2/14/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 2/14/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 2/14/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 2/14/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 2/14/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 2/14/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 2/14/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 2/14/2024 <0.004 µg/L 0.004 µg/L Not Detected
ADONA 2/14/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 2/14/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 2/14/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 2/14/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 2/14/2024 40.5000 µg/L 9 µg/L Detected
PFOS 2/14/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 2/14/2024 <0.02 µg/L 0.02 µg/L Not Detected
NMeFOSAA 2/14/2024 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 2/14/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 2/14/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 2/14/2024 <0.008 µg/L 0.008 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.