No health-based violations on EPA record since 2016.
Serves about 4,993 people (4,200 connections) with groundwater from its own wells, and buys water from Palm Beach County Water Utilities.
From EPA's record for FL4504903. PurityMap is independent of Seminole Improvement District.
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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 June 2023 to December 2023.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorooctanesulfonic acid (PFOS) | 11 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluorooctanoic acid (PFOA) | 4.5 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluorohexanesulfonic acid (PFHxS) | 3.7 ng/L | 10 ng/L federal MCL (2024) | Within a historical reference; current applicability unverified | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluorobutanesulfonic acid (PFBS) | 4.8 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluorohexanoic acid (PFHxA) | 5.4 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluorobutanoic acid (PFBA) | 5.5 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluoroheptanoic acid (PFHpA) | 3.4 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluoropentanoic acid (PFPeA) | 6.6 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| 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 | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| 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 | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| 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 | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| 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 | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| 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 | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| 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 | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-07 to 2023-12-06 | UCMR5 Analytical Results: SEMINOLE IMPROVEMENT DISTRICT (FL4504903) |
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 →Seminole Improvement District's phone number on EPA record is 954-603-0031. Its mailing address is 4001 SEMINOLE PRATT WHITNEY RD, WESTLAKE, FL 33414.
According to EPA's record, Seminole Improvement District uses groundwater from its own wells, and buys water from Palm Beach County Water Utilities.
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 Seminole Improvement District's latest lead and copper round, which ended in December 2025, was 1.3 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Seminole Improvement District. Its phone number on EPA record is 954-603-0031. Its mailing address on EPA record is 4001 SEMINOLE PRATT WHITNEY RD, WESTLAKE, FL 33414. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.