No health-based violations on EPA record since 2016.
Serves about 9,900 people (4,500 connections) with surface water from its own intake.
From EPA's record for IA5640019. PurityMap is independent of Keokuk Municipal Water Works.
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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 August 2024 to May 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 17 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 | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluorobutanesulfonic acid (PFBS) | 6.3 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 | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluorobutanoic acid (PFBA) | 11 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| 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 | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| 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 | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| 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 | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| 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 | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| 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 | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-08-20 to 2025-05-05 | UCMR5 Analytical Results: KEOKUK MUNICIPAL WATER WORKS (IA5640019) |
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 →Keokuk Municipal Water Works's phone number on EPA record is 319-524-2011. Its mailing address is ATTN JIM MADDOX, 20 N 4TH ST PO BOX 10, KEOKUK, IA 52632.
According to EPA's record, Keokuk Municipal Water Works uses surface water from its own intake.
No health-based violations on EPA record since 2016. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Keokuk Municipal Water Works's latest lead and copper round, which ended in December 2023, was 6 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Keokuk Municipal Water Works. Its phone number on EPA record is 319-524-2011. Its mailing address on EPA record is ATTN JIM MADDOX, 20 N 4TH ST PO BOX 10, KEOKUK, IA 52632. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.