SOUTH DESOTO WATER SYSTEM

Compiled by PlainEnviro Editorial, Environmental Data Editorial Team · July 13, 2026

PWSID: LA1031029 · Mansfield, LA · Serves 963 people

Health Violations

SOUTH DESOTO WATER SYSTEM has 128 health-based violations out of 128 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.

Population Served

963

Total Violations

128

Health Violations

128

Source Type

Groundwater

SOUTH DESOTO WATER SYSTEM (PWSID LA1031029) is a cws water system drawing from a groundwater source, regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. It serves approximately 963 people in Mansfield, LA, and is subject to primacy enforcement by the Louisiana drinking-water program.

The system's federal compliance record contains 128 total violations, with 128 classified as health-based (MCL exceedances or treatment-technique failures). 2 distinct contaminants have been cited, including Total Trihalomethanes (TTHM), Fluoride. Recorded violations span 2015–2025.

A historical violation does not necessarily describe current water quality, systems must notify customers and remediate, and monitoring-type violations often reflect reporting lapses rather than contamination. The most authoritative real-time source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Louisiana state drinking-water program's public portal.

System Details

EPA ID (PWSID): LA1031029
System Type: CWS
Water Source: Groundwater
Location: Mansfield, LA
Population Served: 963
Health Violations: Yes (128)

What contaminants are in this water system?

Contaminant	Violations	Health-Based
Total Trihalomethanes (TTHM)	122	122
Fluoride	6	6

Violation History (128)

Contaminant	Type	Health	Date	Enforcement
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2025	-
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2025	4351
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2025	-
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2025	4347
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2025	4348
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2024	4191
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2024	4345
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2024	4191
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2024	4342
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2024	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2024	4342
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	4322
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	4334
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	4342
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2024	4342
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	-
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	4320
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	4333
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	4342
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2024	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	4314
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	-
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	4314
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	4328
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2023	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	4331
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	4312
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	4312
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2023	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	4309
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	4326
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	4309
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	-
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	4191
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	4299
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	4296
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	4293
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	4286
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	4329
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2021	4284
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2021	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2021	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2021	4279
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2021	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2021	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2021	4272
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2021	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2021	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2021	4272
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2021	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2021	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2020	4272
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2020	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2020	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2020	4272
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2020	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2020	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2020	4272
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2020	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2020	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2020	4272
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2020	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2020	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2019	4272
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2019	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2019	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2019	4272
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2019	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2019	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2019	4272
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2019	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2019	4339
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2019	4272
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2019	4307
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2019	4339
Fluoride	TT	Yes	Oct 2, 2018	4287
Fluoride	TT	Yes	Oct 2, 2018	4287
Fluoride	TT	Yes	Oct 2, 2018	4274
Fluoride	TT	Yes	Oct 2, 2018	4274
Fluoride	TT	Yes	Oct 2, 2018	4288

Showing 100 of 128 violations.

Frequently Asked Questions

Is SOUTH DESOTO WATER SYSTEM water safe to drink?

SOUTH DESOTO WATER SYSTEM has 128 health-based violations out of 128 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed. The system uses groundwater water as its source.

How many people does SOUTH DESOTO WATER SYSTEM serve?

SOUTH DESOTO WATER SYSTEM serves 963 people in Mansfield, LA. It is classified as a CWS water system.

What violations does SOUTH DESOTO WATER SYSTEM have?

SOUTH DESOTO WATER SYSTEM has 128 total violations on record spanning 2015–2025. 128 are health-based violations involving contaminants exceeding EPA limits.

What contaminants have been found in SOUTH DESOTO WATER SYSTEM water?

Violations have been recorded for 2 contaminants. The most frequent: Total Trihalomethanes (TTHM), Fluoride.

Nearby Water Systems

DESOTO PARISH WATER WORKS DISTRICT 1

Mansfield · 7,887 served

26 viol.

NORTH DESOTO WATER SYSTEM

Stonewall · 7,608 served

Clean

MANSFIELD WATER SYSTEM

Mansfield · 7,512 served

70 viol.

KEATCHIE WATER SYSTEM

Keatchie · 3,759 served

52 viol.

LOGANSPORT WATER SYSTEM

Logansport · 2,448 served

47 viol.

EAST DESOTO WATER SYSTEM

Mansfield · 1,455 served

53 viol.

RAMBIN-WALLACE WATER SYSTEM

Pelican · 1,161 served

Clean

SOUTH MANSFIELD WATER SYSTEM

Mansfield · 933 served

17 viol.

GRAND CANE WATER SYSTEM

Keatchie · 675 served

1 viol.

SHERWOOD APARTMENTS WATER SYSTEM

Grand Cane · 60 served

2 viol.

Explore More

Louisiana Water Systems → All States → Contaminants →

About This Data

Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Violation records may span multiple years.

Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services

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

Browse all → | Rankings →