No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting January 2023.
Serves about 250 people (92 connections) with surface water from its own intake.
From EPA's record for OK1021222. PurityMap is independent of Otoe-Missouria Tribe.
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47 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Jan–Mar 2023 | Total trihalomethanes (TTHM) | 0.082 mg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2022 | Total trihalomethanes (TTHM) | 0.083 mg/L | 0.080 mg/L | Resolved |
| Jan–Mar 2022 | Total trihalomethanes (TTHM) | 0.085 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2021 | Total trihalomethanes (TTHM) | 0.09 mg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2021 | Total trihalomethanes (TTHM) | 0.086 mg/L | 0.080 mg/L | Resolved |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Apr–Jun 2021 | Total trihalomethanes (TTHM) | 0.09 mg/L | 0.080 mg/L | Resolved |
| Jan–Mar 2021 | Total trihalomethanes (TTHM) | 0.091 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2020 | Total trihalomethanes (TTHM) | 0.083 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2019 | Total trihalomethanes (TTHM) | 0.081 mg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2019 | Total trihalomethanes (TTHM) | 0.142 mg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2019 | Haloacetic acids (HAA5) | 0.13 mg/L | 0.060 mg/L | Resolved |
| Apr–Jun 2019 | Total trihalomethanes (TTHM) | 0.182 mg/L | 0.080 mg/L | Resolved |
| Apr–Jun 2019 | Haloacetic acids (HAA5) | 0.137 mg/L | 0.060 mg/L | Resolved |
| From January 2019 | Carbon, total | – | TT | Resolved |
| Jan–Mar 2019 | Total trihalomethanes (TTHM) | 0.211 mg/L | 0.080 mg/L | Resolved |
| Jan–Mar 2019 | Haloacetic acids (HAA5) | 0.147 mg/L | 0.060 mg/L | Resolved |
| From October 2018 | Carbon, total | – | TT | Resolved |
| Oct–Dec 2018 | Total trihalomethanes (TTHM) | 0.243 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2018 | Haloacetic acids (HAA5) | 0.16 mg/L | 0.060 mg/L | Resolved |
| From August 2018 | Surface Water Treatment Rule | – | – | Resolved |
| From August 2018 | Interim Enhanced Surface Water Treatment Rule | – | – | Resolved |
| From July 2018 | Carbon, total | – | TT | Resolved |
| Jul–Sep 2018 | Total trihalomethanes (TTHM) | 0.217 mg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2018 | Haloacetic acids (HAA5) | 0.084 mg/L | 0.060 mg/L | Resolved |
| From April 2018 | Carbon, total | – | TT | Resolved |
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 →Otoe-Missouria Tribe's phone number on EPA record is 580-723-4466. Its mailing address is Kingston Pipestem, Chairperson, 8151 HWY 177, RED ROCK, OK 74651.
According to EPA's record, Otoe-Missouria Tribe uses surface water from its own intake.
EPA's record shows 47 health-based violations for Otoe-Missouria Tribe 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 2023. EPA also lists 4 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Otoe-Missouria Tribe's latest lead and copper round, which ended in December 2025, was 1.3 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Otoe-Missouria Tribe. Its phone number on EPA record is 580-723-4466. Its mailing address on EPA record is Kingston Pipestem, Chairperson, 8151 HWY 177, RED ROCK, OK 74651. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.