HENNESSEY, OK · Kingfisher County

HENNESSEY Water System

Current status

No open violations on record as of July 4, 2026.

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): OK2003704
System type: Community Water System
Population served: 2,058
Service connections: 1,155
Ownership: local government
Water source: groundwater (wells)

Violation history

Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 2022 – November 28, 2022
Resolved
Initial, Follow-up, or Routine Source Water M/R
—
Lead and Copper Rule
January 1, 2022 – September 16, 2022
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
January 1, 2022 – March 31, 2022
Resolved
Initial, Follow-up, or Routine Source Water M/R
—
Lead and Copper Rule
July 1, 2021 – December 1, 2022
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
July 1, 2020 – September 30, 2020
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
October 1, 2019 – December 31, 2019
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2019 – February 14, 2019
Resolved
Monitoring, Source Water (GWR)
—
E. COLI
October 24, 2018 – February 14, 2019
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
November 1, 2017 – November 30, 2017
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2017 – December 31, 2017
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
July 1, 2017 – September 30, 2017
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2016 – March 31, 2017
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
October 1, 2014 – December 31, 2014
Resolved
Monitoring, Regular
—
Nitrate-Nitrite
July 1, 2014 – September 30, 2014
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
January 1, 2014 – March 31, 2014
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate-Nitrite
July 1, 2012 – September 30, 2012
Resolved
Monitoring, Regular
—
Glyphosate
January 1, 2008 – December 31, 2010
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate-Nitrite
January 1, 2007 – December 31, 2007
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
January 1, 2003 – March 31, 2003
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
January 1, 2003 – March 31, 2003
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
July 1, 2002 – September 30, 2002
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
January 1, 2002 – March 31, 2002
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
July 1, 2001 – September 30, 2001
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
January 1, 2001 – March 31, 2001
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
January 1, 2001 – March 31, 2001
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
October 1, 2000 – December 31, 2000
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
October 1, 2000 – December 31, 2000
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
July 1, 2000 – September 30, 2000
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 1999 – May 31, 1999
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 1998 – September 30, 1998
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
July 1, 1998 – September 30, 1998
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
July 1, 1998 – September 30, 1998
Archived
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
October 1, 1997 – December 31, 1997
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 1997 – June 30, 1997
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
January 1, 1996 – March 31, 1996
Archived
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
October 1, 1995 – December 31, 1995
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
October 1, 1994 – December 31, 1994
Archived
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
October 6, 1993 – January 5, 1994
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Nitrate
August 11, 1993 – November 10, 1993
Resolved
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
May 1, 1992 – May 31, 1992
Resolved

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2022 – November 28, 2022	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2022 – September 16, 2022	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	—	Resolved
January 1, 2022 – March 31, 2022	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Resolved
July 1, 2021 – December 1, 2022	Initial, Follow-up, or Routine Source Water M/R	Lead and Copper Rule	—	Resolved
July 1, 2020 – September 30, 2020	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Resolved
October 1, 2019 – December 31, 2019	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
January 1, 2019 – February 14, 2019	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 24, 2018 – February 14, 2019	Monitoring, Source Water (GWR)	E. COLI	—	Resolved
November 1, 2017 – November 30, 2017	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2017 – December 31, 2017	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2017 – September 30, 2017	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
July 1, 2016 – March 31, 2017	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
October 1, 2014 – December 31, 2014	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Resolved
July 1, 2014 – September 30, 2014	Monitoring, Regular	Nitrate-Nitrite	—	Resolved
January 1, 2014 – March 31, 2014	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Resolved
July 1, 2012 – September 30, 2012	Maximum Contaminant Level Violation, Single Sample	Nitrate-Nitrite	Health-based	Resolved
January 1, 2008 – December 31, 2010	Monitoring, Regular	Glyphosate	—	Resolved
January 1, 2007 – December 31, 2007	Maximum Contaminant Level Violation, Average	Nitrate-Nitrite	Health-based	Resolved
January 1, 2003 – March 31, 2003	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
January 1, 2003 – March 31, 2003	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
July 1, 2002 – September 30, 2002	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
January 1, 2002 – March 31, 2002	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
July 1, 2001 – September 30, 2001	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
January 1, 2001 – March 31, 2001	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
January 1, 2001 – March 31, 2001	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
October 1, 2000 – December 31, 2000	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
October 1, 2000 – December 31, 2000	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
July 1, 2000 – September 30, 2000	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
May 1, 1999 – May 31, 1999	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
September 1, 1998 – September 30, 1998	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 1998 – September 30, 1998	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
July 1, 1998 – September 30, 1998	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Archived
October 1, 1997 – December 31, 1997	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
June 1, 1997 – June 30, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 1996 – March 31, 1996	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Archived
October 1, 1995 – December 31, 1995	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
October 1, 1994 – December 31, 1994	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Archived
October 6, 1993 – January 5, 1994	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
August 11, 1993 – November 10, 1993	Maximum Contaminant Level Violation, Average	Nitrate	Health-based	Resolved
May 1, 1992 – May 31, 1992	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Resolved

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

August 13, 2025State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
August 13, 2025State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
October 2, 2023State Public Notification received1 linked violation
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification received1 linked violation
April 4, 2023State Public Notification received1 linked violation
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification received1 linked violation
April 4, 2023State Public Notification received1 linked violation
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 4, 2023State Public Notification received1 linked violation
February 14, 2023State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 1, 2022State Compliance achieved1 linked violation
December 1, 2022State Compliance achievedgeneral compliance action — not tied to a specific violation on record
December 1, 2022State Compliance achievedgeneral compliance action — not tied to a specific violation on record
November 28, 2022State Compliance achieved1 linked violation
October 24, 2022State Compliance achieved1 linked violation
September 16, 2022State Compliance achieved2 linked violations
September 16, 2022State Compliance achieved1 linked violation
August 30, 2022State Public Notification requested1 linked violation
March 14, 2022State Administrative/Compliance Order without penalty issued6 linked violations
March 1, 2022State Violation/Reminder Notice3 linked violations
March 6, 2021State Public Notification received1 linked violation
September 21, 2020State Public Notification received2 linked violations
September 16, 2020State Administrative/Compliance Order without penalty issued4 linked violations
March 6, 2020State Public Notification requested4 linked violations
November 18, 2019State Public Notification received24 linked violations
December 14, 2018State Public Notification requested1 linked violation
January 12, 2018State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
January 12, 2018State Public Notification requested2 linked violations
January 12, 2018State Violation/Reminder Notice1 linked violation
January 2, 2018State Compliance achieved3 linked violations
December 20, 2017State Compliance achieved2 linked violations
December 14, 2017State Public Notification requested1 linked violation
December 14, 2017State Violation/Reminder Notice2 linked violations
March 31, 2017State Compliance achieved1 linked violation
January 3, 2017State Violation/Reminder Notice1 linked violation
August 4, 2016State Compliance achieved1 linked violation
August 4, 2016State Compliance achieved1 linked violation
August 4, 2016State Compliance achieved1 linked violation
August 4, 2016State Compliance achieved2 linked violations
August 4, 2016State Compliance achieved1 linked violation
August 4, 2016State Compliance achieved2 linked violations
August 4, 2016State Compliance achieved1 linked violation
August 4, 2016State Compliance achieved1 linked violation
August 4, 2016State Compliance achieved1 linked violation
August 4, 2016State Compliance achieved1 linked violation
August 4, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 4, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 4, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 4, 2016State Compliance achieved1 linked violation
August 4, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 4, 2016State Compliance achievedgeneral compliance action — not tied to a specific violation on record
August 4, 2016State Compliance achieved1 linked violation
June 22, 2016State Compliance achieved1 linked violation
June 22, 2016State Compliance achieved1 linked violation
December 5, 2014State Administrative/Compliance Order with penalty issued3 linked violations
April 7, 2014State Public Notification received2 linked violations
March 7, 2014State Public Notification requested5 linked violations
March 13, 2013State Compliance achieved3 linked violations
September 18, 2012State Administrative/Compliance Order with penalty issued2 linked violations
February 22, 2011State Administrative/Compliance Order with penalty issued2 linked violations
February 22, 2011State Public Notification requested1 linked violation
September 17, 2010State Compliance achieved2 linked violations
September 13, 2010State Public Notification received2 linked violations
September 8, 2010State Public Notification requested2 linked violations
February 11, 2010State Public Notification received3 linked violations
February 4, 2010State Violation/Reminder Notice2 linked violations
January 21, 2010State Administrative/Compliance Order with penalty issued3 linked violations
January 21, 2010State Public Notification requested1 linked violation
September 26, 2008State Public Notification received3 linked violations
September 24, 2008State Violation/Reminder Notice2 linked violations
December 18, 2007State Public Notification requested3 linked violations
November 1, 2006State Compliance achieved3 linked violations
October 6, 2006State Public Notification requested3 linked violations
March 26, 2003State Violation/Reminder Notice8 linked violations
July 10, 2002State Public Notification received1 linked violation
May 17, 2002State Public Notification received2 linked violations
April 9, 2002State Violation/Reminder Notice1 linked violation
April 30, 2001State Administrative/Compliance Order with penalty issued4 linked violations
February 3, 2000State Administrative/Compliance Order with penalty issued19 linked violations
July 28, 1994State Administrative/Compliance Order without penalty issued7 linked violations

Contact

HENNESSEY

405-853-2416

HENNESSEY, OK 73742-0306