PlainWater
States → Louisiana

UNITED WATER SYSTEM

PWS ID: LA1099009 · ARNAUDVILLE, Louisiana 70512

PFAS Detected

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

Population Served
4,446
Total Violations
209
Health-Based Violations
175
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
1,482
County
St. Martin Parish
School/Daycare
No
MCL Violations
160
Monitoring Violations
14
Treatment Tech Violations
15

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 149 2022
Groundwater Rule TT 12 2022
Coliform (TCR) MCL 11 2008
Lead and Copper Rule MR 10 2021
Consumer Confidence Rule Other 9 2016
Public Notice Other 6 2017
Coliform (TCR) MR 4 2013
Lead and Copper Rule TT 3 2017

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 1 of 60 samples detected PFAS.

Contaminant Date Result MRL Status
NFDHA 8/7/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFBA 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 8/7/2024 <9 µg/L 9 µg/L Not Detected
PFEESA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/7/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 8/7/2024 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 8/7/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 8/7/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 8/7/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFDoA 8/7/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/7/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFUnA 8/7/2024 <0.002 µg/L 0.002 µg/L Not Detected
HFPO-DA 2/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 2/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 2/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 2/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 2/3/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 2/3/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 2/3/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 2/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 2/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 2/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 2/3/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 2/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 2/3/2025 <0.006 µg/L 0.006 µg/L Not Detected
ADONA 2/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 2/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFTA 2/3/2025 <0.008 µg/L 0.008 µg/L Not Detected
6:2 FTS 2/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 2/3/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 2/3/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 2/3/2025 <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.