No health-based violations on EPA record since 2016.
Serves about 2,759 people (113 connections) with groundwater from its own wells.
From EPA's record for WA5354192. PurityMap is independent of West Sequim Bay Inc.
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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 2023 to September 2023.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| 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 | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| 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 | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| 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 | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| 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 | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| 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 | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| 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 | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| 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 | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-22 to 2023-09-13 | UCMR5 Analytical Results: WEST SEQUIM BAY INC (WA5354192) |
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 →According to EPA's record, West Sequim Bay Inc uses groundwater from its own wells.
No health-based violations on EPA record since 2016. EPA also lists 7 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in West Sequim Bay Inc's latest lead and copper round, which ended in December 2024, was 1 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for West Sequim Bay Inc. Its mailing address on EPA record is PO BOX 92, SEQUIM, WA 98382. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.