No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting July 2025.
Serves about 2,800 people (1,327 connections) with groundwater from its own wells.
From EPA's record for OK1021691. PurityMap is independent of Grand Lake PWA.
Are you this utility? Correct this listing →
3 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| From July 2025 | Combined radium-226/228 | 7 pCi/L | 5 pCi/L | Archived |
| From January 2024 | Combined radium-226/228 | 6 pCi/L | 5 pCi/L | Resolved |
| From October 2023 | Combined radium-226/228 | 6 pCi/L | 5 pCi/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.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure
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 →Grand Lake PWA's phone number on EPA record is 918-535-2302. Its mailing address is Richard Boyd, Chairman, P.O. Box 420, OCHELATA, OK 74051.
According to EPA's record, Grand Lake PWA uses groundwater from its own wells.
EPA's record shows 3 health-based violations for Grand Lake PWA 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 July 2025. EPA also lists 14 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Grand Lake PWA's latest lead and copper round, which ended in December 2025, was 3.1 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Grand Lake PWA. Its phone number on EPA record is 918-535-2302. Its mailing address on EPA record is Richard Boyd, Chairman, P.O. Box 420, OCHELATA, OK 74051. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.