No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting October 2024.
Serves about 10,725 people (3,575 connections) with groundwater from its own wells, and buys water from Cadeville Water District.
From EPA's record for LA1073047. PurityMap is independent of Southwest Ouachita Waterworks, Inc.
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25 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Oct–Dec 2024 | Total trihalomethanes (TTHM) | 0.081 mg/L | 0.080 mg/L | Archived |
| Jul–Sep 2024 | Total trihalomethanes (TTHM) | 0.086 mg/L | 0.080 mg/L | Archived |
| Apr–Jun 2024 | Total trihalomethanes (TTHM) | 0.081 mg/L | 0.080 mg/L | Archived |
| Jan–Mar 2024 | Total trihalomethanes (TTHM) | 0.082 mg/L | 0.080 mg/L | Archived |
| Jul–Sep 2020 | Total trihalomethanes (TTHM) | 0.084 mg/L | 0.080 mg/L | Resolved |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From January 2020 | Groundwater Rule | – | – | Resolved |
| From January 2020 | Groundwater Rule | – | – | Resolved |
| Apr–Jun 2019 | Total trihalomethanes (TTHM) | 0.088 mg/L | 0.080 mg/L | Resolved |
| Jan–Mar 2019 | Total trihalomethanes (TTHM) | 0.081 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2018 | Total trihalomethanes (TTHM) | 0.117 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2018 | Haloacetic acids (HAA5) | 0.075 mg/L | 0.060 mg/L | Resolved |
| Jul–Sep 2018 | Haloacetic acids (HAA5) | 84 µg/L | 0.060 mg/L | Resolved |
| Jul–Sep 2018 | Total trihalomethanes (TTHM) | 136 µg/L | 0.080 mg/L | Resolved |
| Apr–Jun 2018 | Haloacetic acids (HAA5) | 66 µg/L | 0.060 mg/L | Resolved |
| Apr–Jun 2018 | Total trihalomethanes (TTHM) | 203 µg/L | 0.080 mg/L | Resolved |
| Jan–Mar 2018 | Haloacetic acids (HAA5) | 81 µg/L | 0.060 mg/L | Resolved |
| Jan–Mar 2018 | Total trihalomethanes (TTHM) | 246 µg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2017 | Haloacetic acids (HAA5) | 73 µg/L | 0.060 mg/L | Resolved |
| Oct–Dec 2017 | Total trihalomethanes (TTHM) | 257 µg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2017 | Total trihalomethanes (TTHM) | 244 µg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2017 | Haloacetic acids (HAA5) | 65 µg/L | 0.060 mg/L | Resolved |
| Apr–Jun 2017 | Total trihalomethanes (TTHM) | 242 µg/L | 0.080 mg/L | Resolved |
| Jan–Mar 2017 | Total trihalomethanes (TTHM) | 257 µg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2016 | Total trihalomethanes (TTHM) | 260 µg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2016 | Haloacetic acids (HAA5) | 61 µg/L | 0.060 mg/L | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from February 2024 to August 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 10.9 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 | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| 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 | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| 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 | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| 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 | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| 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 | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| 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 | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| 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 | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-02-27 to 2024-08-22 | UCMR5 Analytical Results: SOUTHWEST OUACHITA WATERWORKS, INC (LA1073047) |
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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.
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Follow this water →Southwest Ouachita Waterworks, Inc's phone number on EPA record is 318-325-3371. Its mailing address is SOUTHWEST OUACHITA WATERWORKS, INC., 1840 HIGHWAY 3033, WEST MONROE, LA 71292.
According to EPA's record, Southwest Ouachita Waterworks, Inc uses groundwater from its own wells, and buys water from Cadeville Water District.
EPA's record shows 25 health-based violations for Southwest Ouachita Waterworks, Inc 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 2024. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Southwest Ouachita Waterworks, Inc's latest lead and copper round, which ended in December 2025, was 3 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Southwest Ouachita Waterworks, Inc. Its phone number on EPA record is 318-325-3371. Its mailing address on EPA record is SOUTHWEST OUACHITA WATERWORKS, INC., 1840 HIGHWAY 3033, WEST MONROE, LA 71292. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.