No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting January 2023.
Serves about 7,335 people (2,445 connections) with groundwater from its own wells, and buys water from City of Monroe Water System.
From EPA's record for LA1073046. PurityMap is independent of South Monroe WS Gowc.
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12 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Jan–Mar 2023 | Total trihalomethanes (TTHM) | 0.084 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2022 | Total trihalomethanes (TTHM) | 0.081 mg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2022 | Total trihalomethanes (TTHM) | 0.085 mg/L | 0.080 mg/L | Resolved |
| Jan–Mar 2020 | Total trihalomethanes (TTHM) | 0.093 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2019 | Total trihalomethanes (TTHM) | 0.095 mg/L | 0.080 mg/L | Resolved |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Jul–Sep 2019 | Total trihalomethanes (TTHM) | 0.092 mg/L | 0.080 mg/L | Resolved |
| Apr–Jun 2019 | Total trihalomethanes (TTHM) | 0.103 mg/L | 0.080 mg/L | Resolved |
| Jan–Mar 2019 | Total trihalomethanes (TTHM) | 0.084 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2018 | Total trihalomethanes (TTHM) | 0.087 mg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2018 | Total trihalomethanes (TTHM) | 93 µg/L | 0.080 mg/L | Resolved |
| Jan–Mar 2018 | Total trihalomethanes (TTHM) | 101 µg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2017 | Total trihalomethanes (TTHM) | 113 µg/L | 0.080 mg/L | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from May 2025 to November 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 11.7 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 | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| 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 | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| 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 | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| 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 | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| 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 | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| 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 | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| 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 | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-05-05 to 2025-11-03 | UCMR5 Analytical Results: SOUTH MONROE WS GOWC (LA1073046) |
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 →South Monroe WS Gowc'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, South Monroe WS Gowc uses groundwater from its own wells, and buys water from City of Monroe Water System.
EPA's record shows 12 health-based violations for South Monroe WS Gowc 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 January 2023. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in South Monroe WS Gowc's latest lead and copper round, which ended in December 2023, was 1 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for South Monroe WS Gowc. 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.