No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting October 2020.
Serves about 7,173 people (2,391 connections) with surface water from its own intake, and buys water from Town of Logansport Water System.
From EPA's record for LA1031030. PurityMap is independent of Desoto Parish Water Works District 1.
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8 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From August 2025 | Surface Water Treatment Rule | – | – | Archived |
| From September 2024 | Surface Water Treatment Rule | – | – | Resolved |
| From January 2024 | Surface Water Treatment Rule | – | – | Resolved |
| From October 2023 | Surface Water Treatment Rule | – | – | Resolved |
| From August 2023 | Surface Water Treatment Rule | – | – | Resolved |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Oct–Dec 2020 | Total trihalomethanes (TTHM) | 0.082 mg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2020 | Total trihalomethanes (TTHM) | 0.093 mg/L | 0.080 mg/L | Resolved |
| Apr–Jun 2020 | Total trihalomethanes (TTHM) | 0.091 mg/L | 0.080 mg/L | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from March 2025 to October 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluoropentanoic acid (PFPeA) | 3.1 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2025-03-26 to 2025-09-10 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-26 to 2025-10-29 | UCMR5 Analytical Results: DESOTO PARISH WATER WORKS DISTRICT 1 (LA1031030) |
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
Turnaround: 5 minutes
What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 2–4 business days after the lab receives it
What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.
Get PurityMap updates about this water system.
Follow this water →Desoto Parish Water Works District 1's phone number on EPA record is 318-872-0004. Its mailing address is DeSoto Waterworks District No. 1, P.O. Box 1409, MANSFIELD, LA 71052.
According to EPA's record, Desoto Parish Water Works District 1 uses surface water from its own intake, and buys water from Town of Logansport Water System.
EPA's record shows 8 health-based violations for Desoto Parish Water Works District 1 in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. The latest legal-limit breach on record was in the period starting October 2020. EPA also lists 27 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Desoto Parish Water Works District 1's latest lead and copper round, which ended in December 2024, was 2 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Desoto Parish Water Works District 1. Its phone number on EPA record is 318-872-0004. Its mailing address on EPA record is DeSoto Waterworks District No. 1, P.O. Box 1409, MANSFIELD, LA 71052. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.