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DESOTO PARISH WATER WORKS DISTRICT 1

PWS ID: LA1031030 · MANSFIELD, Louisiana 71052

DESOTO PARISH WATER WORKS DISTRICT 1 serves 7,887 people in MANSFIELD, Louisiana using Surface Water water sources. It has 412 recorded EPA violations, including 261 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: DESOTO PARISH WATER WORKS DISTRICT 1

DESOTO PARISH WATER WORKS DISTRICT 1 is a local-owned community water system that delivers drinking water to 7,887 residents in MANSFIELD, Louisiana (De Soto Parish County) through 2,629 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 412 total violations for this system , of which 261 (63%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 121 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 95 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 0.0031 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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. DESOTO PARISH WATER WORKS DISTRICT 1's 412 violations sit above the Louisiana average. Statewide, 218 of 265 UCMR5-tested systems have reported PFAS detections (82.3%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

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

Population Served
7,887
Total Violations
412
Health-Based Violations
261
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
2,629
County
De Soto Parish
School/Daycare
No
MCL Violations
189
Monitoring Violations
121
Treatment Tech Violations
72

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 95 2014
TTHM MCL 60 2020
Total Haloacetic Acids (HAA5) MR 57 2020
TTHM MR 56 2020
CARBON, TOTAL TT 48 2011
Total Haloacetic Acids (HAA5) MCL 34 2015
Surface Water Treatment Rule TT 18 2025
Public Notice Other 17 2023
Consumer Confidence Rule Other 10 2015
Lead and Copper Rule MR 8 2009
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 6 2004

PFAS Testing Results (UCMR5)

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

Contaminant Date Result MRL Status
lithium 9/10/2025 <9 µg/L 9 µg/L Not Detected
9Cl-PF3ONS 3/26/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFUnA 3/26/2025 <0.002 µg/L 0.002 µg/L Not Detected
NMeFOSAA 3/26/2025 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 3/26/2025 <0.005 µg/L 0.005 µg/L Not Detected
11Cl-PF3OUdS 3/26/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 3/26/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 3/26/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 3/26/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 3/26/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 3/26/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 3/26/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 3/26/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 3/26/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 3/26/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 3/26/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFHxA 3/26/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 3/26/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFBA 3/26/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 3/26/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 3/26/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 3/26/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 3/26/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 3/26/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 3/26/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 3/26/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 3/26/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 3/26/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 3/26/2025 <0.003 µg/L 0.003 µg/L Not Detected
lithium 3/26/2025 <9 µg/L 9 µg/L Not Detected
PFDoA 3/26/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 10/29/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 10/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 10/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 10/29/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 10/29/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 10/29/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 10/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 10/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 10/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 10/29/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 10/29/2025 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 10/29/2025 <0.002 µg/L 0.002 µg/L Not Detected
NEtFOSAA 10/29/2025 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 10/29/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 10/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 10/29/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 10/29/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 10/29/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 10/29/2025 <0.004 µg/L 0.004 µg/L 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 DESOTO PARISH WATER WORKS DISTRICT 1.

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 LA1031030 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
2025 Surface Water Treatment Rule TT 18 SDWIS / LA1031030 / 0200
2023 Public Notice Other 17 SDWIS / LA1031030 / 7500
2020 TTHM MCL 60 SDWIS / LA1031030 / 2950
2020 Total Haloacetic Acids (HAA5) MR 57 SDWIS / LA1031030 / 2456
2020 TTHM MR 56 SDWIS / LA1031030 / 2950
2015 Total Haloacetic Acids (HAA5) MCL 34 SDWIS / LA1031030 / 2456
2015 Consumer Confidence Rule Other 10 SDWIS / LA1031030 / 7000
2014 Coliform (TCR) MCL 95 SDWIS / LA1031030 / 3100
2011 CARBON, TOTAL TT 48 SDWIS / LA1031030 / 2920
2009 Lead and Copper Rule MR 8 SDWIS / LA1031030 / 5000
2004 Stage 1 Disinfectants and Disinfection Byproducts Rule TT 6 SDWIS / LA1031030 / 0400

How DESOTO PARISH WATER WORKS DISTRICT 1 Compares

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

Metric DESOTO PARISH WATER WORKS DISTRICT 1 Louisiana avg Federal benchmark
Total violations 412 93.2 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 261 50.4 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 82.3% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 7,887 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is DESOTO PARISH WATER WORKS DISTRICT 1 water safe to drink? ▼
DESOTO PARISH WATER WORKS DISTRICT 1 (PWS ID: LA1031030) has 412 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 7,887 people using Surface Water sources.
How many people does DESOTO PARISH WATER WORKS DISTRICT 1 serve? ▼
DESOTO PARISH WATER WORKS DISTRICT 1 serves 7,887 people in MANSFIELD, Louisiana. It is a Local-owned system using Surface Water water sources with 2,629 service connections.
What type of violations does DESOTO PARISH WATER WORKS DISTRICT 1 have? ▼
DESOTO PARISH WATER WORKS DISTRICT 1 has 412 total violations: 261 health-based violations (MCL exceedances or treatment failures), 121 monitoring/reporting violations, and 72 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in DESOTO PARISH WATER WORKS DISTRICT 1 water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in DESOTO PARISH WATER WORKS DISTRICT 1's water supply: PFPeA. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does DESOTO PARISH WATER WORKS DISTRICT 1 use? ▼
DESOTO PARISH WATER WORKS DISTRICT 1 uses Surface Water 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.

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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.

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial