Total trihalomethanes (TTHM) above the legal limit in the period starting October 2025.
Serves about 1,243 people (502 connections) with surface water from its own intake.
From EPA's record for OK1021304. PurityMap is independent of Barnsdall.
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174 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Oct–Dec 2025 | Total trihalomethanes (TTHM) | 0.104 mg/L | 0.080 mg/L | Archived |
| Oct–Dec 2025 | Total trihalomethanes (TTHM) | 0.099 mg/L | 0.080 mg/L | Archived |
| Oct–Dec 2025 | Haloacetic acids (HAA5) | 0.079 mg/L | 0.060 mg/L | Archived |
| From October 2025 | Carbon, total | 0.66 RATIO | TT | Archived |
| From July 2025 | Carbon, total | 0.67 RATIO | TT | Archived |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Jul–Sep 2025 | Total trihalomethanes (TTHM) | 0.095 mg/L | 0.080 mg/L | Archived |
| Jul–Sep 2025 | Total trihalomethanes (TTHM) | 0.098 mg/L | 0.080 mg/L | Archived |
| Jul–Sep 2025 | Haloacetic acids (HAA5) | 0.073 mg/L | 0.060 mg/L | Archived |
| From June 2025 | Surface Water Treatment Rule | – | – | Archived |
| From June 2025 | Surface Water Treatment Rule | – | – | Archived |
| From June 2025 | Interim Enhanced Surface Water Treatment Rule | – | – | Archived |
| From June 2025 | Interim Enhanced Surface Water Treatment Rule | – | – | Archived |
| From May 2025 | Surface Water Treatment Rule | – | – | Archived |
| From May 2025 | Interim Enhanced Surface Water Treatment Rule | – | – | Archived |
| From April 2025 | Carbon, total | 0.63 RATIO | TT | Archived |
| Apr–Jun 2025 | Total trihalomethanes (TTHM) | 0.093 mg/L | 0.080 mg/L | Archived |
| Apr–Jun 2025 | Total trihalomethanes (TTHM) | 0.097 mg/L | 0.080 mg/L | Archived |
| From January 2025 | Carbon, total | 0.68 RATIO | TT | Archived |
| From December 2024 | Interim Enhanced Surface Water Treatment Rule | – | – | Archived |
| From December 2024 | Interim Enhanced Surface Water Treatment Rule | – | – | Archived |
| From October 2024 | Lead and copper rule revisions | – | – | Resolved |
| From October 2024 | Carbon, total | 0.78 RATIO | TT | Archived |
| Oct–Dec 2024 | Total trihalomethanes (TTHM) | 0.084 mg/L | 0.080 mg/L | Archived |
| From September 2024 | Surface Water Treatment Rule | – | – | Archived |
| From August 2024 | Surface Water Treatment Rule | – | – | Archived |
No lab results for other contaminants (like PFAS) are on file for this system. EPA required that testing from systems serving more than 3,300 people, plus a sample of smaller ones.
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 →Barnsdall's phone number on EPA record is 918-847-3522. Its mailing address is The Honorable John Kelly, Mayor, P.O. Box 879, BARNSDALL, OK 74002-0879.
According to EPA's record, Barnsdall uses surface water from its own intake.
EPA's record shows 174 health-based violations for Barnsdall in the 10 years to July 9, 2026. Total trihalomethanes (TTHM) were above the legal limit in the period starting October 2025. EPA also lists 73 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Barnsdall's latest lead and copper round, which ended in December 2025, was 5.7 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Barnsdall. Its phone number on EPA record is 918-847-3522. Its mailing address on EPA record is The Honorable John Kelly, Mayor, P.O. Box 879, BARNSDALL, OK 74002-0879. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.