No health-based violations on EPA record since 2016.
Serves about 5,379 people (1,906 connections) with surface water bought from Berwick Bayou Vista WW Commission.
From EPA's record for LA1101015. PurityMap is independent of St Mary Parish W&S #2 Bayou Vista.
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No health-based violations in the last 10 years, from EPA's SDWIS compliance database.
EPA required this system to test for 30 unregulated and emerging contaminants, from February 2025 to November 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorohexanoic acid (PFHxA) | 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluorobutanoic acid (PFBA) | 6.9 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluoropentanoic acid (PFPeA) | 3.1 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| 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 | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| 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 | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| 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 | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| 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 | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| 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 | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| 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 | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| 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 | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-10 to 2025-11-12 | UCMR5 Analytical Results: ST MARY PARISH W&S #2 BAYOU VISTA (LA1101015) |
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 →St Mary Parish W&S #2 Bayou Vista's phone number on EPA record is 985-395-2747. Its mailing address is Chris Cooper - St. Mary No. 2 WS, PO Box 635, PATTERSON, LA 70392.
According to EPA's record, St Mary Parish W&S #2 Bayou Vista uses surface water bought from Berwick Bayou Vista WW Commission.
No health-based violations on EPA record since 2016. EPA also lists 1 missed or late test or report in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in St Mary Parish W&S #2 Bayou Vista's latest lead and copper round, which ended in December 2025, was 0.3 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for St Mary Parish W&S #2 Bayou Vista. Its phone number on EPA record is 985-395-2747. Its mailing address on EPA record is Chris Cooper - St. Mary No. 2 WS, PO Box 635, PATTERSON, LA 70392. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.