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GRAND LAKE PWA

Oklahoma — Community Water System — PWSID: OK1021691

System Information

PWSIDOK1021691
System NameGRAND LAKE PWA
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region06
Serves SchoolNo
WholesalerNo
First ReportedDec 3, 1992
Last ReportedNov 14, 2025

Location & Contact

StateOklahoma
CityOCHELATA
ZIP Code74051
AddressRichard Boyd, Chairman
OrganizationGRAND LAKE PWA
Phone918-535-2302

Population & Service

Population Served2,800
Service Connections1,327

Drinking Water Violations (361)

This water system has 361 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Oct 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Jul 11, 2025 Lead and Copper Rule
Oct 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Jul 11, 2025 Lead and Copper Rule
Oct 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Jul 11, 2025 Lead and Copper Rule
Oct 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Jul 11, 2025 Lead and Copper Rule
Jan 1, 2024 Mar 31, 2024 Combined Radium (-226 and -228) MCL Yes No 6 PCI/L 5 pCi/L 5 Resolved Mar 31, 2024 Radionuclides and Revised Rad Rule
Jan 1, 2024 Mar 31, 2024 Combined Radium (-226 and -228) MCL Yes No 6 PCI/L 5 pCi/L 5 Resolved Mar 31, 2024 Radionuclides and Revised Rad Rule
Jan 1, 2024 Mar 31, 2024 Combined Radium (-226 and -228) MCL Yes No 6 PCI/L 5 pCi/L 5 Resolved Mar 31, 2024 Radionuclides and Revised Rad Rule
Oct 2, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jul 11, 2023 Consumer Confidence Rule
Oct 2, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jul 11, 2023 Consumer Confidence Rule
Oct 1, 2023 Dec 31, 2023 Combined Radium (-226 and -228) MCL Yes No 6 PCI/L 5 pCi/L 5 Archived Dec 31, 2023 Radionuclides and Revised Rad Rule
Oct 1, 2023 Dec 31, 2023 Combined Radium (-226 and -228) MCL Yes No 6 PCI/L 5 pCi/L 5 Archived Dec 31, 2023 Radionuclides and Revised Rad Rule
Apr 1, 2022 Jun 30, 2022 Combined Uranium MR No Yes — 30 ug/L — Resolved Jun 30, 2022 Radionuclides and Revised Rad Rule
Apr 1, 2022 Jun 30, 2022 Gross Beta Particle Activity MR No Yes — 4 mrem/yr — Resolved Jun 30, 2022 Radionuclides and Revised Rad Rule
Apr 1, 2022 Jun 30, 2022 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Jun 30, 2022 Radionuclides and Revised Rad Rule
Apr 1, 2022 Jun 30, 2022 Gross Beta Particle Activity MR No Yes — 4 mrem/yr — Resolved Jun 30, 2022 Radionuclides and Revised Rad Rule
Apr 1, 2022 Jun 30, 2022 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Jun 30, 2022 Radionuclides and Revised Rad Rule
Apr 1, 2022 Jun 30, 2022 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Jun 30, 2022 Radionuclides and Revised Rad Rule
Apr 1, 2022 Jun 30, 2022 Combined Uranium MR No Yes — 30 ug/L — Resolved Jun 30, 2022 Radionuclides and Revised Rad Rule
Apr 1, 2022 Jun 30, 2022 Gross Beta Particle Activity MR No Yes — 4 mrem/yr — Resolved Jun 30, 2022 Radionuclides and Revised Rad Rule
Apr 1, 2022 Jun 30, 2022 Combined Uranium MR No Yes — 30 ug/L — Resolved Jun 30, 2022 Radionuclides and Revised Rad Rule
Apr 1, 2022 Jun 30, 2022 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Jun 30, 2022 Radionuclides and Revised Rad Rule
Apr 1, 2022 Jun 30, 2022 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Jun 30, 2022 Radionuclides and Revised Rad Rule
Apr 1, 2022 Jun 30, 2022 Gross Beta Particle Activity MR No Yes — 4 mrem/yr — Resolved Jun 30, 2022 Radionuclides and Revised Rad Rule
Apr 1, 2022 Jun 30, 2022 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Jun 30, 2022 Radionuclides and Revised Rad Rule
Apr 1, 2022 Jun 30, 2022 Combined Uranium MR No Yes — 30 ug/L — Resolved Jun 30, 2022 Radionuclides and Revised Rad Rule
Apr 1, 2022 Jun 30, 2022 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Jun 30, 2022 Radionuclides and Revised Rad Rule
Apr 1, 2022 Jun 30, 2022 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Jun 30, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Combined Uranium MR No Yes — 30 ug/L — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Combined Uranium MR No Yes — 30 ug/L — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Gross Beta Particle Activity MR No Yes — 4 mrem/yr — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Gross Beta Particle Activity MR No Yes — 4 mrem/yr — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Gross Beta Particle Activity MR No Yes — 4 mrem/yr — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Combined Uranium MR No Yes — 30 ug/L — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Gross Beta Particle Activity MR No Yes — 4 mrem/yr — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Combined Uranium MR No Yes — 30 ug/L — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Oct 20, 2020 — E. COLI MR No Yes — — — Resolved Dec 8, 2022 Ground Water Rule
Oct 20, 2020 — E. COLI MR No Yes — — — Resolved Dec 8, 2022 Ground Water Rule
Oct 20, 2020 — E. COLI MR No Yes — — — Resolved Dec 8, 2022 Ground Water Rule
Oct 20, 2020 — E. COLI MR No Yes — — — Resolved Dec 8, 2022 Ground Water Rule
Oct 1, 2018 Oct 31, 2018 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2018 Revised Total Coliform Rule
Oct 1, 2018 Oct 31, 2018 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2018 Revised Total Coliform Rule
Oct 1, 2018 Oct 31, 2018 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2018 Revised Total Coliform Rule

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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