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Community Water System · PWS LA1055156

Lpwd South

Duson, Louisiana 70529 - drinking water served from groundwater sources to 15,132 people, tracked in EPA SDWIS and UCMR5.

15,132
People served
16
EPA violations
7
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 16 drinking-water violations at Lpwd South, 44% of them health-based - below the Louisiana per-system average.

16
Total EPA violations on record
44%
Health-based (MCL / treatment failure)
15,132
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Lpwd South

Lpwd South is a local-owned community water system that delivers drinking water to 15,132 residents in Duson, Louisiana (Lafayette Parish County) through 5,044 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 16 total violations for this system , of which 7 (44%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 8 monitoring and reporting violations are on file. The most recent violation on record dates to 2010.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 7 violations (MCL, health-based). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Louisiana, EPA tracks 1,234 public water systems serving 5,316,532 people, with 115,060 cumulative violations and 62,164 health-based violations on record. About 93% of systems in the state carry at least one violation, and state-wide the average per system is 93.2 violations. Statewide, 218 of 265 UCMR5-tested systems have reported PFAS detections (82.3%).

Lpwd South's 16 violations sit below the Louisiana average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
15,132
Total Violations
16
Health-Based Violations
7
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
5,044
County
Lafayette Parish
School/Daycare
No
MCL Violations
7
Monitoring Violations
8
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 7 2004
TTHM MR 4 2010
Total Haloacetic Acids (HAA5) MR 4 2010

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 58 samples detected PFAS.

Contaminant Date Result MRL Status
6:2 FTS 8/26/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 8/26/2024 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 8/26/2024 <5.00 ppt 5.00 ppt Not Detected
ADONA 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 8/26/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFUnA 8/26/2024 <2.00 ppt 2.00 ppt Not Detected
9Cl-PF3ONS 8/26/2024 <2.00 ppt 2.00 ppt Not Detected
8:2 FTS 8/26/2024 <5.00 ppt 5.00 ppt Not Detected
PFMPA 8/26/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeA 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFEESA 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 8/26/2024 <20.00 ppt 20.00 ppt Not Detected
PFHpS 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFTA 8/26/2024 <8.00 ppt 8.00 ppt Not Detected
PFPeS 8/26/2024 <4.00 ppt 4.00 ppt Not Detected
PFTrDA 8/26/2024 <7.00 ppt 7.00 ppt Not Detected
PFHxA 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 8/26/2024 <6.00 ppt 6.00 ppt Not Detected
PFBS 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxS 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFNA 8/26/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 8/26/2024 <4.00 ppt 4.00 ppt Not Detected
PFOA 8/26/2024 <4.00 ppt 4.00 ppt Not Detected
PFDA 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 8/26/2024 <5.00 ppt 5.00 ppt Not Detected
8:2 FTS 2/11/2025 <5.00 ppt 5.00 ppt Not Detected
PFPeS 2/11/2025 <4.00 ppt 4.00 ppt Not Detected
NFDHA 2/11/2025 <20.00 ppt 20.00 ppt Not Detected
PFEESA 2/11/2025 <3.00 ppt 3.00 ppt Not Detected
PFMBA 2/11/2025 <3.00 ppt 3.00 ppt Not Detected
PFPeA 2/11/2025 <3.00 ppt 3.00 ppt Not Detected
PFMPA 2/11/2025 <4.00 ppt 4.00 ppt Not Detected
4:2 FTS 2/11/2025 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 2/11/2025 <5.00 ppt 5.00 ppt Not Detected
PFBA 2/11/2025 <5.00 ppt 5.00 ppt Not Detected
PFHpS 2/11/2025 <3.00 ppt 3.00 ppt Not Detected
ADONA 2/11/2025 <3.00 ppt 3.00 ppt Not Detected
PFDoA 2/11/2025 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 2/11/2025 <5.00 ppt 5.00 ppt Not Detected
PFHpA 2/11/2025 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 2/11/2025 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 2/11/2025 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 2/11/2025 <7.00 ppt 7.00 ppt Not Detected
PFTA 2/11/2025 <8.00 ppt 8.00 ppt Not Detected
PFUnA 2/11/2025 <2.00 ppt 2.00 ppt Not Detected
PFBS 2/11/2025 <3.00 ppt 3.00 ppt Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Lpwd South.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID LA1055156 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Louisiana Drinking Water Authority

Louisiana's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find LA regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2010 TTHM MR 4 SDWIS / LA1055156 / 2950
2010 Total Haloacetic Acids (HAA5) MR 4 SDWIS / LA1055156 / 2456
2004 Coliform (TCR) MCL 7 SDWIS / LA1055156 / 3100

How Lpwd South Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Lpwd South Louisiana avg Federal benchmark
Total violations 16 93.2 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 7 50.4 Indicates a contaminant exceeded a federal MCL
PFAS detection None 82.3% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 15,132 4,308 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,234 regulated public water systems in Louisiana.

Federal MCL reference, Safe Drinking Water Act thresholds
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Lpwd South water safe to drink?
Lpwd South (PWS ID: LA1055156) has 16 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 15,132 people using Groundwater sources.
How many people does Lpwd South serve?
Lpwd South serves 15,132 people in Duson, Louisiana. It is a Local-owned system using Groundwater water sources with 5,044 service connections.
What type of violations does Lpwd South have?
Lpwd South has 16 total violations: 7 health-based violations (MCL exceedances or treatment failures), 8 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Lpwd South water?
No. Lpwd South was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Lpwd South use?
Lpwd South uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from?
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
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.
Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.