No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting January 2025.
Serves about 3,800 people (2,136 connections) with surface water from its own intake.
From EPA's record for OK1021301. PurityMap is independent of Pawhuska.
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19 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Jan–Mar 2025 | Total trihalomethanes (TTHM) | 0.083 mg/L | 0.080 mg/L | Archived |
| From October 2024 | Lead and copper rule revisions | – | – | Resolved |
| Apr–Jun 2021 | Total trihalomethanes (TTHM) | 0.081 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2020 | Total trihalomethanes (TTHM) | 0.083 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2020 | Total trihalomethanes (TTHM) | 0.082 mg/L | 0.080 mg/L | Resolved |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Jul–Sep 2020 | Total trihalomethanes (TTHM) | 0.081 mg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2020 | Total trihalomethanes (TTHM) | 0.085 mg/L | 0.080 mg/L | Resolved |
| From July 2020 | Interim Enhanced Surface Water Treatment Rule | – | – | Resolved |
| From June 2020 | Interim Enhanced Surface Water Treatment Rule | – | – | Resolved |
| Apr–Jun 2020 | Total trihalomethanes (TTHM) | 0.084 mg/L | 0.080 mg/L | Resolved |
| From March 2020 | Interim Enhanced Surface Water Treatment Rule | – | – | Resolved |
| From February 2020 | Interim Enhanced Surface Water Treatment Rule | – | – | Resolved |
| Jan–Mar 2020 | Total trihalomethanes (TTHM) | 0.081 mg/L | 0.080 mg/L | Resolved |
| Apr–Jun 2019 | Total trihalomethanes (TTHM) | 0.088 mg/L | 0.080 mg/L | Resolved |
| Jan–Mar 2019 | Total trihalomethanes (TTHM) | 0.089 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2018 | Total trihalomethanes (TTHM) | 0.088 mg/L | 0.080 mg/L | Resolved |
| Jan–Mar 2017 | Total trihalomethanes (TTHM) | 0.084 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2016 | Total trihalomethanes (TTHM) | 0.083 mg/L | 0.080 mg/L | Resolved |
| From August 2016 | E. coli | – | – | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from January 2024 to November 2024.
| 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 | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| 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 | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| 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 | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| 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 | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| 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 | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| 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 | 2024-01-10 to 2024-10-16 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| 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 | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-01-10 to 2024-11-20 | UCMR5 Analytical Results: PAWHUSKA (OK1021301) |
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 →Pawhuska's phone number on EPA record is 918-287-3040. Its mailing address is Susan Bayro, Mayor, P.O. Box 539, PAWHUSKA, OK 74056.
According to EPA's record, Pawhuska uses surface water from its own intake.
EPA's record shows 19 health-based violations for Pawhuska in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. The latest legal-limit breach on record was in the period starting January 2025. EPA also lists 19 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Pawhuska's latest lead and copper round, which ended in December 2025, was 3.6 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Pawhuska. Its phone number on EPA record is 918-287-3040. Its mailing address on EPA record is Susan Bayro, Mayor, P.O. Box 539, PAWHUSKA, OK 74056. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.