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GRADY CO RWD #7 (NINNEKAH)

Oklahoma — Community Water System — PWSID: OK2002633

System Information

PWSIDOK2002633
System NameGRADY CO RWD #7 (NINNEKAH)
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region06
Serves SchoolNo
WholesalerNo
First ReportedJan 22, 1981
Last ReportedNov 14, 2025

Location & Contact

StateOklahoma
CityNINNEKAH
ZIP Code73067
AddressMr. John Donnellan, Chairperson
OrganizationGRADY COUNTY RWD #7 (NINNEKAH)
Phone405-224-2398

Population & Service

Population Served2,425
Service Connections1,225

Drinking Water Violations (87)

This water system has 87 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 17, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Sep 15, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Sep 15, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Resolved Sep 15, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Resolved Sep 15, 2025 Lead and Copper Rule Revisions
Oct 1, 2024 — Lead and Copper Rule MR No No — TT — Unaddressed — Lead and Copper Rule
Oct 1, 2024 — Lead and Copper Rule MR No No — TT — Unaddressed — Lead and Copper Rule
Jan 1, 2024 Jan 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Jan 31, 2024 Revised Total Coliform Rule
Jan 1, 2024 Jan 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Jan 31, 2024 Revised Total Coliform Rule
Jan 1, 2024 Jan 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Jan 31, 2024 Revised Total Coliform Rule
Jan 1, 2024 Mar 31, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2024 Mar 31, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2024 Mar 31, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2017 Dec 31, 2019 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2019 Arsenic Rule
Jan 1, 2017 Dec 31, 2019 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2019 Arsenic Rule
Jan 1, 2017 Dec 31, 2019 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2019 Arsenic Rule
Jan 1, 2017 Dec 31, 2019 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2019 Arsenic Rule
Jan 1, 2014 Dec 31, 2019 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2019 Radionuclides and Revised Rad Rule
Jan 1, 2014 Dec 31, 2019 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2019 Radionuclides and Revised Rad Rule
Jan 1, 2014 Dec 31, 2019 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2019 Radionuclides and Revised Rad Rule
Jan 1, 2014 Dec 31, 2019 Combined Uranium MR No Yes — 30 ug/L — Resolved Dec 31, 2019 Radionuclides and Revised Rad Rule
Jan 1, 2014 Dec 31, 2019 Combined Uranium MR No Yes — 30 ug/L — Resolved Dec 31, 2019 Radionuclides and Revised Rad Rule
Jan 1, 2014 Dec 31, 2019 Combined Uranium MR No Yes — 30 ug/L — Resolved Dec 31, 2019 Radionuclides and Revised Rad Rule
Jan 1, 2014 Dec 31, 2019 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2019 Radionuclides and Revised Rad Rule
Jan 1, 2014 Dec 31, 2019 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2019 Radionuclides and Revised Rad Rule
Jan 1, 2014 Dec 31, 2019 Gross Beta Particle Activity MR No Yes — 4 mrem/yr — Resolved Dec 31, 2019 Radionuclides and Revised Rad Rule
Jan 1, 2014 Dec 31, 2019 Gross Beta Particle Activity MR No Yes — 4 mrem/yr — Resolved Dec 31, 2019 Radionuclides and Revised Rad Rule
Jan 1, 2014 Dec 31, 2019 Gross Beta Particle Activity MR No Yes — 4 mrem/yr — Resolved Dec 31, 2019 Radionuclides and Revised Rad Rule
Jan 1, 2014 Dec 31, 2019 Gross Beta Particle Activity MR No Yes — 4 mrem/yr — Resolved Dec 31, 2019 Radionuclides and Revised Rad Rule
Jan 1, 2014 Dec 31, 2019 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2019 Radionuclides and Revised Rad Rule
Jan 1, 2014 Dec 31, 2019 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2019 Radionuclides and Revised Rad Rule
Jan 1, 2014 Dec 31, 2019 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2019 Radionuclides and Revised Rad Rule
Jan 1, 2014 Dec 31, 2019 Combined Uranium MR No Yes — 30 ug/L — Resolved Dec 31, 2019 Radionuclides and Revised Rad Rule
Jul 1, 2009 Sep 30, 2009 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Sep 30, 2009 Arsenic Rule
Jul 1, 2009 Sep 30, 2009 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Sep 30, 2009 Arsenic Rule
Jul 1, 2009 Sep 30, 2009 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Sep 30, 2009 Arsenic Rule
Jul 1, 2009 Sep 30, 2009 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Sep 30, 2009 Arsenic Rule
Jul 1, 2009 Sep 30, 2009 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Sep 30, 2009 Arsenic Rule
Jul 1, 2009 Sep 30, 2009 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Sep 30, 2009 Arsenic Rule
Apr 1, 2009 Jun 30, 2009 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Jun 30, 2009 Arsenic Rule
Apr 1, 2009 Jun 30, 2009 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Jun 30, 2009 Arsenic Rule
Apr 1, 2009 Jun 30, 2009 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Jun 30, 2009 Arsenic Rule
Apr 1, 2009 Jun 30, 2009 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Jun 30, 2009 Arsenic Rule
Apr 1, 2009 Jun 30, 2009 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Jun 30, 2009 Arsenic Rule
Jan 1, 2009 Mar 31, 2009 Arsenic MCL Yes No .012 MG/L 0.010 mg/L .01 Resolved Mar 31, 2009 Arsenic Rule
Jan 1, 2009 Mar 31, 2009 Arsenic MCL Yes No .012 MG/L 0.010 mg/L .01 Resolved Mar 31, 2009 Arsenic Rule
Jan 1, 2009 Mar 31, 2009 Arsenic MCL Yes No .012 MG/L 0.010 mg/L .01 Resolved Mar 31, 2009 Arsenic Rule
Jan 1, 2009 Mar 31, 2009 Arsenic MCL Yes No .012 MG/L 0.010 mg/L .01 Resolved Mar 31, 2009 Arsenic Rule
Jan 1, 2009 Mar 31, 2009 Arsenic MCL Yes No .012 MG/L 0.010 mg/L .01 Resolved Mar 31, 2009 Arsenic Rule
Oct 1, 2008 Dec 31, 2008 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Dec 31, 2008 Arsenic Rule
Oct 1, 2008 Dec 31, 2008 Arsenic MCL Yes No .011 MG/L 0.010 mg/L .01 Resolved Dec 31, 2008 Arsenic 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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