Total trihalomethanes (TTHM) above the legal limit in the period starting October 2025; 1 open health-based violation on EPA record.
Serves about 561 people (191 connections) with surface water bought from Barnsdall.
From EPA's record for OK3005721. PurityMap is independent of Osage Co RWD # 5.
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98 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) | 0.105 mg/L | 0.080 mg/L | Archived |
| Oct–Dec 2025 | Total trihalomethanes (TTHM) | 0.107 mg/L | 0.080 mg/L | Archived |
| Oct–Dec 2025 | Haloacetic acids (HAA5) | 0.063 mg/L | 0.060 mg/L | Archived |
| Oct–Dec 2025 | Haloacetic acids (HAA5) | 0.064 mg/L | 0.060 mg/L | Archived |
| Jul–Sep 2025 | Total trihalomethanes (TTHM) | 0.106 mg/L | 0.080 mg/L | Archived |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Jul–Sep 2025 | Total trihalomethanes (TTHM) | 0.109 mg/L | 0.080 mg/L | Archived |
| Jul–Sep 2025 | Haloacetic acids (HAA5) | 0.075 mg/L | 0.060 mg/L | Archived |
| Jul–Sep 2025 | Haloacetic acids (HAA5) | 0.078 mg/L | 0.060 mg/L | Archived |
| Apr–Jun 2025 | Total trihalomethanes (TTHM) | 0.083 mg/L | 0.080 mg/L | Archived |
| Apr–Jun 2025 | Total trihalomethanes (TTHM) | 0.104 mg/L | 0.080 mg/L | Archived |
| Apr–Jun 2025 | Haloacetic acids (HAA5) | 0.073 mg/L | 0.060 mg/L | Archived |
| Jan–Mar 2025 | Total trihalomethanes (TTHM) | 0.105 mg/L | 0.080 mg/L | Archived |
| Jan–Mar 2025 | Haloacetic acids (HAA5) | 0.069 mg/L | 0.060 mg/L | Archived |
| From October 2024 | Lead and copper rule revisions | – | – | Addressed |
| Oct–Dec 2024 | Total trihalomethanes (TTHM) | 0.102 mg/L | 0.080 mg/L | Archived |
| Oct–Dec 2024 | Haloacetic acids (HAA5) | 0.072 mg/L | 0.060 mg/L | Archived |
| Jul–Sep 2024 | Total trihalomethanes (TTHM) | 0.096 mg/L | 0.080 mg/L | Archived |
| Jul–Sep 2024 | Haloacetic acids (HAA5) | 0.067 mg/L | 0.060 mg/L | Archived |
| Apr–Jun 2024 | Total trihalomethanes (TTHM) | 0.084 mg/L | 0.080 mg/L | Archived |
| Oct–Dec 2023 | Total trihalomethanes (TTHM) | 0.083 mg/L | 0.080 mg/L | Archived |
| Jul–Sep 2023 | Total trihalomethanes (TTHM) | 0.084 mg/L | 0.080 mg/L | Archived |
| Jul–Sep 2023 | Total trihalomethanes (TTHM) | 0.095 mg/L | 0.080 mg/L | Archived |
| Apr–Jun 2023 | Total trihalomethanes (TTHM) | 0.1 mg/L | 0.080 mg/L | Archived |
| Apr–Jun 2023 | Total trihalomethanes (TTHM) | 0.12 mg/L | 0.080 mg/L | Archived |
| Jan–Mar 2023 | Total trihalomethanes (TTHM) | 0.122 mg/L | 0.080 mg/L | 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 →Osage Co RWD # 5's phone number on EPA record is 918-695-7402. Its mailing address is Dottie Gay, Chairperson, P.O. BOX 467, BARNSDALL, OK 74002.
According to EPA's record, Osage Co RWD # 5 uses surface water bought from Barnsdall.
EPA's record shows 98 health-based violations for Osage Co RWD # 5 in the 10 years to July 9, 2026. Total trihalomethanes (TTHM) were above the legal limit in the period starting October 2025. EPA's record also shows 1 open health-based violation. EPA also lists 22 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Osage Co RWD # 5's latest lead and copper round, which ended in December 2023, was 1.7 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Osage Co RWD # 5. Its phone number on EPA record is 918-695-7402. Its mailing address on EPA record is Dottie Gay, Chairperson, P.O. BOX 467, BARNSDALL, OK 74002. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.