No open health-based violations on EPA record in the last 10 years.
Serves about 6,465 people (2,155 connections) with groundwater from its own wells, and buys water from Prairie Ronde Water System Inc.
From EPA's record for LA1097012. PurityMap is independent of Plaisance Water System.
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2 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From November 2018 | Groundwater Rule | – | – | Resolved |
| From November 2018 | Groundwater Rule | – | – | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from February 2025 to August 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 16.4 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| 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 | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| 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 | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| 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 | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| 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 | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| 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 | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| 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 | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-12 to 2025-08-04 | UCMR5 Analytical Results: PLAISANCE WATER SYSTEM (LA1097012) |
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 →Plaisance Water System's phone number on EPA record is 337-501-2599. Its mailing address is PLAISANCE WATER SYSTEM, P.O. BOX 2136, OPELOUSAS, LA 70570.
According to EPA's record, Plaisance Water System uses groundwater from its own wells, and buys water from Prairie Ronde Water System Inc.
EPA's record shows 2 health-based violations for Plaisance Water System in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. EPA also lists 3 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Plaisance Water System's latest lead and copper round, which ended in December 2025. The federal action level is 15 µg/L.
PurityMap has no verified website for Plaisance Water System. Its phone number on EPA record is 337-501-2599. Its mailing address on EPA record is PLAISANCE WATER SYSTEM, P.O. BOX 2136, OPELOUSAS, LA 70570. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.