TONKAWA, OK · Kay County

TONKAWA Water System

Current status

5 items on record are open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Oklahoma’s official records. Always confirm current status with Oklahoma before making decisions based on this information.

System facts

System ID (PWSID): OK2003603
System type: Community Water System
Population served: 3,299
Service connections: 1,255
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring, Source Water (GWR)
—
E. COLI
August 14, 2025
Unaddressed
LSL Reporting
—
LEAD AND COPPER RULE REVISIONS
October 17, 2024 – July 15, 2025
Resolved
LSL Inventory
Health-based
LEAD AND COPPER RULE REVISIONS
October 17, 2024 – July 15, 2025
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
October 1, 2022 – September 30, 2023
Resolved
Monitoring and Reporting (DBP)
—
TTHM
October 1, 2022 – September 30, 2023
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
January 19, 2017
Unaddressed
Monitoring, Source Water (GWR)
—
E. COLI
September 17, 2015
Unaddressed
Monitoring, Source Water (GWR)
—
E. COLI
September 18, 2014
Unaddressed
Monitoring, Source Water (GWR)
—
E. COLI
August 21, 2014
Unaddressed
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2014 – March 16, 2015
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
September 1, 2013 – September 30, 2013
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2013 – October 14, 2015
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2012 – October 14, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
October 1, 2011 – October 31, 2011
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2009 – May 31, 2009
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2008 – September 30, 2008
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2008 – June 9, 2009
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2008 – June 9, 2009
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
2,4-D
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Atrazine
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
LASSO
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Glyphosate
January 1, 2005 – December 31, 2007
Resolved
Monitoring, Regular
—
Gross Beta Particle Activity
July 1, 2001 – September 30, 2001
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
April 1, 2001 – June 30, 2001
Resolved
Monitoring, Regular
—
Gross Beta Particle Activity
April 1, 2001 – June 30, 2001
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
April 1, 2001 – June 30, 2001
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2001 – December 31, 2001
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 1998 – September 30, 1998
Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
August 14, 2025	Monitoring, Source Water (GWR)	E. COLI	—	Unaddressed
October 17, 2024 – July 15, 2025	LSL Reporting	LEAD AND COPPER RULE REVISIONS	—	Resolved
October 17, 2024 – July 15, 2025	LSL Inventory	LEAD AND COPPER RULE REVISIONS	Health-based	Resolved
October 1, 2022 – September 30, 2023	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
October 1, 2022 – September 30, 2023	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 19, 2017	Monitoring, Source Water (GWR)	E. COLI	—	Unaddressed
September 17, 2015	Monitoring, Source Water (GWR)	E. COLI	—	Unaddressed
September 18, 2014	Monitoring, Source Water (GWR)	E. COLI	—	Unaddressed
August 21, 2014	Monitoring, Source Water (GWR)	E. COLI	—	Unaddressed
July 1, 2014 – March 16, 2015	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
September 1, 2013 – September 30, 2013	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
July 1, 2013 – October 14, 2015	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2012 – October 14, 2015	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
October 1, 2011 – October 31, 2011	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
May 1, 2009 – May 31, 2009	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
September 1, 2008 – September 30, 2008	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
July 1, 2008 – June 9, 2009	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2008 – June 9, 2009	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	2,4-D	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Atrazine	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	LASSO	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 2005 – December 31, 2007	Monitoring, Regular	Glyphosate	—	Resolved
July 1, 2001 – September 30, 2001	Monitoring, Regular	Gross Beta Particle Activity	—	Resolved
April 1, 2001 – June 30, 2001	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
April 1, 2001 – June 30, 2001	Monitoring, Regular	Gross Beta Particle Activity	—	Resolved
April 1, 2001 – June 30, 2001	Monitoring, Regular	Combined Radium (-226 and -228)	—	Resolved
January 1, 2001 – December 31, 2001	Monitoring, Regular	Nitrate	—	Resolved
September 1, 1998 – September 30, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Enforcement actions

September 19, 2025State Public Notification requested3 linked violations
July 15, 2025State Compliance achieved4 linked violations
August 6, 2024State Public Notification received5 linked violations
September 27, 2019State Public Notification received3 linked violations
August 4, 2016State Compliance achieved2 linked violations
August 4, 2016State Compliance achieved3 linked violations
November 14, 2013State Public Notification requested5 linked violations
November 17, 2011State Public Notification requested8 linked violations
March 28, 2010State Compliance achieved4 linked violations
September 21, 2009State Public Notification received10 linked violations
July 27, 2009State Public Notification requested3 linked violations
June 11, 2009State Public Notification received5 linked violations
June 9, 2009State Compliance achieved5 linked violations
September 16, 2008State Administrative/Compliance Order with penalty issued10 linked violations
June 7, 2007State Public Notification received7 linked violations
August 22, 2002State Compliance achieved1 linked violation
March 21, 2002State Compliance achieved1 linked violation
February 6, 2002State Administrative/Compliance Order with penalty issued1 linked violation
February 6, 2002State Administrative/Compliance Order with penalty issued1 linked violation
December 14, 2001State Compliance achieved6 linked violations
November 5, 2001State Administrative/Compliance Order with penalty issued6 linked violations

Contact

TONKAWA

580-628-2508

TONKAWA, OK 74653