No health-based violations on EPA record since 2016.
Serves about 776 people (1,129 connections) with surface water bought from Central Water System.
From EPA's record for IA3060091. PurityMap is independent of Okoboji Water Supply.
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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 January 2025 to October 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 11 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 | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluorobutanoic acid (PFBA) | 9.2 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| 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 | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| 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 | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| 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 | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| 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 | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| 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 | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| 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 | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-06 to 2025-10-14 | UCMR5 Analytical Results: OKOBOJI WATER SUPPLY (IA3060091) |
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 →Okoboji Water Supply's phone number on EPA record is 712-332-2550. Its mailing address is ATTN NEAL HOUGE WATER SUPT, PO BOX 377, OKOBOJI, IA 51355.
According to EPA's record, Okoboji Water Supply uses surface water bought from Central Water System.
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 Okoboji Water Supply'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 Okoboji Water Supply. Its phone number on EPA record is 712-332-2550. Its mailing address on EPA record is ATTN NEAL HOUGE WATER SUPT, PO BOX 377, OKOBOJI, IA 51355. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.