1 open health-based violation on EPA record.
Serves about 9,696 people (3,232 connections) with groundwater from its own wells.
From EPA's record for LA1073004. PurityMap is independent of Brownville Water System.
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11 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From January 2021 | Groundwater Rule | – | – | Unaddressed |
| Jan–Mar 2019 | Total trihalomethanes (TTHM) | 0.092 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2018 | Total trihalomethanes (TTHM) | 109 µg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2018 | Total trihalomethanes (TTHM) | 131 µg/L | 0.080 mg/L | Resolved |
| Apr–Jun 2018 | Total trihalomethanes (TTHM) | 118 µg/L | 0.080 mg/L | Resolved |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Jan–Mar 2018 | Total trihalomethanes (TTHM) | 105 µg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2017 | Total trihalomethanes (TTHM) | 87 µg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2017 | Total trihalomethanes (TTHM) | 83 µg/L | 0.080 mg/L | Resolved |
| Apr–Jun 2017 | Total trihalomethanes (TTHM) | 119 µg/L | 0.080 mg/L | Resolved |
| Jan–Mar 2017 | Total trihalomethanes (TTHM) | 115 µg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2016 | Total trihalomethanes (TTHM) | 147 µg/L | 0.080 mg/L | 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 | 14.6 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 | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| 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 | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| 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 | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| 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 | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| 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 | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| 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 | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| 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 | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-25 to 2025-08-06 | UCMR5 Analytical Results: BROWNVILLE WATER SYSTEM (LA1073004) |
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 →Brownville Water System's phone number on EPA record is 318-322-3741. Its mailing address is GREATER OUACHITA WATER COMPANY, PO BOX 1257, WEST MONROE, LA 71294.
According to EPA's record, Brownville Water System uses groundwater from its own wells.
EPA's record shows 11 health-based violations for Brownville Water System in the 10 years to July 9, 2026. EPA's record lists 1 open health-based violation. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Brownville Water System's latest lead and copper round, which ended in December 2023, was 2 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Brownville Water System. Its phone number on EPA record is 318-322-3741. Its mailing address on EPA record is GREATER OUACHITA WATER COMPANY, PO BOX 1257, WEST MONROE, LA 71294. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.